MODEL HRE-MA series HFE-MA series HRFE-MA series

MODEL HRE-MA series HFE-MA series HRFE-MA series. i ... Philippine Plug (230V±10% 60Hz) ... Keep the following in mind when making electrical connecti...

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NO. R262-841 ISSUED: MAY. 31, 2011 REVISED: APR. 30, 2014

HOSHIZAKI

COMMERCIAL REFRIGERATOR/FREEZER MODEL

HRE-MA series HFE-MA series HRFE-MA series SERVICE MANUAL



CONTENTS PAGE

I. GENERAL INFORMATION---------------------------------------------------------------------------1 1. SAFETY INSTRUCTIONS--------------------------------------------------------------------------1 2. DIMENSIONS/SPECIFICATIONS----------------------------------------------------------------3 [a] HRE-77MA-CHD----------------------------------------------------------------------------------3 [b] HRE-127MA-CHD--------------------------------------------------------------------------------4 [c] HRE-147MA-CHD--------------------------------------------------------------------------------5 [d] HRE-187MA-CHD--------------------------------------------------------------------------------6 [e] HFE-77MA-CHD----------------------------------------------------------------------------------7 [f] HFE-127MA-CHD---------------------------------------------------------------------------------8 [g] HFE-147MA-CHD--------------------------------------------------------------------------------9 [h] HFE-187MA-CHD------------------------------------------------------------------------------ 10 [i] HRFE-77MA-CHD------------------------------------------------------------------------------- 11 [j] HRFE-127MAF-CHD--------------------------------------------------------------------------- 12 [k] HRFE-147MAF-CHD-------------------------------------------------------------------------- 13 [l] HRFE-187MAF-CHD--------------------------------------------------------------------------- 14 II. TECHNICAL INFORMATION---------------------------------------------------------------------- 15 1. WIRING DIAGRAM--------------------------------------------------------------------------------- 15 Standard models------------------------------------------------------------------------------------ 15 [a] HRE-77MA-CHD-------------------------------------------------------------------------------- 15 [b] HRE-127MA-CHD, HRE-147MA-CHD---------------------------------------------------- 15 [c] HRE-187MA-CHD------------------------------------------------------------------------------ 16 [d] HFE-77MA-CHD-------------------------------------------------------------------------------- 16 [e] HFE-127MA-CHD, HFE-147MA-CHD----------------------------------------------------- 17 [f] HFE-187MA-CHD------------------------------------------------------------------------------- 17 [g] HRFE-77MA-CHD------------------------------------------------------------------------------ 18 [h] HRFE-127MAF-CHD, HFE-147MAF-CHD----------------------------------------------- 19 [i] HRFE-187MAF-CHD--------------------------------------------------------------------------- 20 Forced drain water evaporation models------------------------------------------------------ 21 [j] HRE-77MA-CHD--------------------------------------------------------------------------------- 21 [k] HRE-127MA-CHD, HRE-147MA-CHD---------------------------------------------------- 22 [l] HRE-187MA-CHD------------------------------------------------------------------------------- 23 [m] HFE-77MA-CHD------------------------------------------------------------------------------- 24 [n] HFE-127MA-CHD, HFE-147MA-CHD----------------------------------------------------- 25 [o] HFE-187MA-CHD------------------------------------------------------------------------------ 26 2. REFRIGERATION CIRCUIT--------------------------------------------------------------------- 27 3. ELECTRONIC CONTROLS---------------------------------------------------------------------- 29 [a] SET POINT TEMPERATURE--------------------------------------------------------------- 29 [b] CABINET TEMPERATURE DIFFERENTIAL-------------------------------------------- 29 [c] DEFROST CYCLE----------------------------------------------------------------------------- 29 [d] DEFROST TERMINATION TEMPERATURE-------------------------------------------- 29 [e] TEMPERATURE DISPLAY------------------------------------------------------------------- 29 [f] COMPRESSOR SOFT START-------------------------------------------------------------- 30 [g] HIGH PRESSURE SWITCH----------------------------------------------------------------- 30 [h] CHECKING SET POINT TEMPERATURE----------------------------------------------- 31 [i] MANUAL DEFROST---------------------------------------------------------------------------- 32

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[j] ERROR CODES--------------------------------------------------------------------------------- 32 4. TIMING CHART------------------------------------------------------------------------------------- 33 [a] STARTUP - CONTROL----------------------------------------------------------------------- 33 [b] DEFROST---------------------------------------------------------------------------------------- 34 5. CONTROLLER-------------------------------------------------------------------------------------- 35 [a] HRE SERIES, HRFE SERIES - REFRIGERATOR------------------------------------ 35 [b] HFE SERIES, HRFE SERIES - FREEZER---------------------------------------------- 38 III. SERVICE DIAGNOSIS----------------------------------------------------------------------------- 43 1. ERROR CODES------------------------------------------------------------------------------------ 43 [a] HRE SERIES, HRFE SERIES - REFRIGERATOR------------------------------------ 43 [b] HFE SERIES, HRFE SERIES - FREEZER---------------------------------------------- 43 2. FLOWCHART---------------------------------------------------------------------------------------- 44 [a] HRE SERIES, HRFE SERIES - REFRIGERATOR------------------------------------ 44 [b] HFE SERIES, HRFE SERIES - FREEZER---------------------------------------------- 46 3. COMPONENTS------------------------------------------------------------------------------------- 47 4. CONTROLLER-------------------------------------------------------------------------------------- 49 [a] SERVICING CONTROLLER----------------------------------------------------------------- 49 [b] CHECKING THERMISTOR------------------------------------------------------------------ 50 IV. REMOVAL AND REPLACEMENT OF COMPONENTS----------------------------------- 51 1. CONTROLLER AND THERMISTOR----------------------------------------------------------- 51 [a] CONTROLLER---------------------------------------------------------------------------------- 51 [b] THERMISTOR----------------------------------------------------------------------------------- 51 2. REFRIGERATION CIRCUIT--------------------------------------------------------------------- 54 [a] COMPRESSOR--------------------------------------------------------------------------------- 54 [b] CONDENSER AND DRIER------------------------------------------------------------------ 54 [c] EVAPORATOR---------------------------------------------------------------------------------- 55 [d] CONDENSER FAN MOTOR----------------------------------------------------------------- 55 [e] DEFROST HEATER AND THERMAL FUSE-------------------------------------------- 56 3. AIR DUCT--------------------------------------------------------------------------------------------- 57 [a] AIR DUCT---------------------------------------------------------------------------------------- 57 [b] INTERIOR FAN MOTOR (Except HRFE-77MA)---------------------------------------- 58 [c] INTERIOR FAN MOTOR (HRFE-77MA)-------------------------------------------------- 59 4. DOOR PARTS--------------------------------------------------------------------------------------- 60 [a] HINGE SPACER-------------------------------------------------------------------------------- 60 [b] LIFT HINGE-------------------------------------------------------------------------------------- 60 [c] DOOR GASKET--------------------------------------------------------------------------------- 60 5. EVAPORATION TANK----------------------------------------------------------------------------- 61 [a] DRAIN TANK HEATER------------------------------------------------------------------------ 61 [b] THERMOSTAT---------------------------------------------------------------------------------- 61 [c] THERMAL FUSE-------------------------------------------------------------------------------- 61 6. CONDENSER CLEANING PAN----------------------------------------------------------------- 62 7. OPTIONAL PARTS--------------------------------------------------------------------------------- 63 [a] HINGE KIT--------------------------------------------------------------------------------------- 63 [b] LEG------------------------------------------------------------------------------------------------ 63 [c] CASTER------------------------------------------------------------------------------------------ 63

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Explanation for Model Name

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*

- *

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Product Classification

Door Type

HRE: Refrigerator

HD: Half door type

HFE: Freezer

LD: Long door type

HRFE: Refrigerator/Freezer

Power Supply Type C: Chinese Plug (220V±10% 50Hz) S: UK Plug (230V±10% 50Hz) T: Taiwanese Plug (220V±10% 60Hz) P: Philippine Plug (230V±10% 60Hz)

Custom Type F: Two freezer compartments

Body Dimensions

Product Type

Width

Depth

B: High class series

70: 700 mm

800 mm

MA: A-FIT series

77: 700 mm

750 mm

127: 1200 mm

750 mm

140: 1400mm

800 mm

147: 1400 mm

750 mm

187: 1800mm

750 mm

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I. GENERAL INFORMATION 1. SAFETY INSTRUCTIONS The following instructions contain important safety precautions and should be strictly observed. The terms used here are defined as follows: WARNING: There is a possibility of death or serious injury to the service person and a third party or the user due to improper service operations or defects in serviced products. CAUTION: There is a possibility of injury to the service person and a third party or the user or damage to their property* due to improper service operations or defects in serviced products. * The term “damage to their property” here refers to extensive damage to household effects, houses and pets.

WARNING 1. Always ask the user to keep children away from the work area. They may be injured by tools or disassembled products. 2. When there is no need to energize the unit during disassembly or cleaning, be sure to unplug the unit or disconnect the main power supply before servicing the unit to prevent electric shocks. 3. If the unit must be energized for inspection of the electric circuit, use rubber gloves to avoid contact with any live parts resulting in electric shocks. 4. Keep the following in mind when servicing the refrigeration circuit: (1) Be sure to recover the refrigerant. Do not discharge it into the atmosphere. It will affect the environment. (2) Check for any flames in the vicinity, and ensure good ventilation. (3) If the refrigerant should leak in servicing, immediately put out any fire used in the vicinity. (4) When unbrazing the refrigeration circuit connections, check that the circuit is completely evacuated. The refrigerant may produce a poisonous gas when coming in contact with an open flame. (5) Do not braze in an enclosed room to prevent carbon monoxide poisoning. (6) In case of a refrigerant leak, locate and repair the leaking part completely before recharging the refrigerant and checking for further leaks. If the leaking part cannot

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be located, be sure to check again for further leaks after recharging the refrigerant. Leaked refrigerant may produce a poisonous gas when coming in contact with an open flame of a gas cooking stove or a fan heater. (7) Before servicing, check the surface temperature of the refrigeration circuit to prevent a burn. 5. Keep the following in mind when making electrical connections: (1) Check for proper earth connections, and repair if necessary to prevent electric shocks. (2) Always use service parts intended for the applicable model for replacement of defective parts. Use proper tools to secure the wiring. Otherwise abnormal operation or trouble may occur and cause electric leaks or fire. (3) Check for proper part installations, wiring conditions and soldered or solderless terminal connections to avoid fire, heat or electric shocks. (4) Be sure to replace damaged or deteriorated power cords and lead wires to prevent fire, heat or electric shocks. (5) Cut-off lead wires must be bound using closed end connectors or the like, with their closed ends up to avoid entrance of moisture that could lead to electric leaks or fire. (6) After servicing, always use a megohmmeter (500V DC) to check for the insulation resistance of at least 1 megohm between the live part (attachment plug) and the dead metal part (earth terminal). (7) Do not service the electrical parts with wet hands to prevent electric shocks. (8) The capacitors used for the compressor and other components may be under high voltage and should be discharged properly before servicing.

CAUTION 1. After servicing, follow the instructions below: (1) Always check the unit for proper operation before finishing services. (2) Be sure to reassemble the parts completely. Loose assembly of such parts as control box cover may cause entrance of vermins resulting in a short circuit between terminals and possible ignition.

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2. DIMENSIONS/SPECIFICATIONS *Representative (standard) models only [a] HRE-77MA-CHD (Model Code: R262-C501)

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2013.09.16

ホシザキ電機

参考図

[b] HRE-127MA-CHD (Model Code: R263-C501)

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[c] HRE-147MA-CHD (Model Code: R264-C501)

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[d] HRE-187MA-CHD (Model Code: R265-C501)

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[e] HFE-77MA-CHD (Model Code: R266-C501)

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[f] HFE-127MA-CHD (Model Code: R267-C501)

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[g] HFE-147MA-CHD (Model Code: R268-C501)

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[h] HFE-187MA-CHD (Model Code: R269-501)

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[i] HRFE-77MA-CHD (Model Code: R281-C501)

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[j] HRFE-127MAF-CHD (Model Code: R282-C501)

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[k] HRFE-147MAF-CHD (Model Code: R283-C501)

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[l] HRFE-187MAF-CHD (Model Code: R284-C501)

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II. TECHNICAL INFORMATION 1. WIRING DIAGRAM *Standard models: model names and model codes for representative models only [a] HRE-77MA-CHD (Model Code: R262-C501)

[b] HRE-127MA-CHD (Model Code: R263-C501) HRE-147MA-CHD (Model Code: R264-C501)

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[c] HRE-187MA-CHD (Model Code: R265-C501)

[d] HFE-77MA-CHD (Model Code: R266-C501)

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[e] HFE-127MA-CHD (Model Code: R267-C501) HFE-147MA-CHD (Model Code: R268-C501)

[f] HFE-187MA-CHD (Model Code: R269-501)

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[g] HRFE-77MA-CHD (Model Code: R281-C501)

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[h] HRFE-127MAF-CHD (Model Code: R282-C501) HRFE-147MAF-CHD (Model Code: R283-C501)

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[i] HRFE-187MAF-CHD (Model Code: R284-C501)

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*Forced drain water evaporation models: model names and model codes for representative models only [j] HRE-77MA-CHD (Model Code: R262-C571)

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[k] HRE-127MA-CHD (Model Code: R263-C571) HRE-147MA-CHD (Model Code: R264-C571)

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[l] HRE-187MA-CHD (Model Code: R265-C571)

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[m] HFE-77MA-CHD (Model Code: R266-C571)

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[n] HFE-127MA-CHD (Model Code: R267-C571) HFE-147MA-CHD (Model Code: R268-C571)

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[o] HFE-187MA-CHD (Model Code: R269-C571)

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2. REFRIGERATION CIRCUIT Compressor

HRE/HFE

Fan Motor

Condenser

Heat Exchange

Evaporator Drier

HRFE-77MA

Compressor (Freezer)

Fan Motor

Condenser

Heat Exchange

Drier

Evaporator

Compressor (Refrigerator) Heat Exchange

Drier

Evaporator

Refrigerant: HFC-134a (HRE series) (HRFE refrigerator) HFC-404A (HFE series) (HRFE freezer)

There may be exceptions for some customized models.

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HRFE-127,147,187MAF

Compressor (Refrigerator)

Fan Motor

Condenser

Heat Exchange

Evaporator Drier

Compressor (Freezer)

Fan Motor

Condenser

Heat Exchange

Evaporator Drier

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3. ELECTRONIC CONTROLS [a] SET POINT TEMPERATURE (compressor OFF temperature)

4K

Average Cabinet Temperature

-2 to +12°C -23 to -7°C

Interior Thermistor Temperature

Off-cycle defrost (HRE series, HRFE series - refrigerator): Heater defrost (HFE series, HRFE series - freezer):

Time Set Point Temperature Compressor

ON OFF

[b] CABINET TEMPERATURE DIFFERENTIAL 4 K (from “set point temp” to “set point temp + 4 K”) The compressor stops when the cabinet temperature reaches down to the set point temperature, and starts when the cabinet temperature rises to the set point temperature + 4°C. Accordingly, the average cabinet temperature will be around the set point temperature + 2°C. [c] DEFROST CYCLE The unit automatically defrosts the evaporator 3 hours (refrigerator) or 6 hours (freezer) after the refrigeration starts. The defrost indicator light on the operation panel comes on when the defrost cycle starts. [d] DEFROST TERMINATION TEMPERATURE Off-cycle defrost (HRE series, HRFE series - refrigerator): Heater defrost (HFE series, HRFE series - freezer): Heater defrost (Only HFE-187MA):

+5 +30°C +20°C

[e] TEMPERATURE DISPLAY During a defrost cycle, the screen indicates “dF” (HFE series, HRFE series - freezer).

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[f] COMPRESSOR SOFT START 1) Startup Power ON 3 min

Compressor Condenser Fan Motor Cabinet Temp Display Interior Fan Motor (HRE, HRFE - refrigerator) Interior Fan Motor (HFE, HRFE - freezer)

ON OFF ON OFF 1 min ON OFF

When the power supply is turned on, the screen shows the cabinet temperature and the interior fan motor starts up immediately (HRE series, HRFE series - refrigerator) or with a 1 minute delay (HFE series, HRFE series - freezer). The compressor and condenser fan motor start up with a 3 minute delay. This delay is intended to minimize the difference between the high-side and low-side pressures and to reduce the load on the compressor so that it can start easily in case of a short (especially instantaneous) power failure. 2) Normal Control Interior Thermistor

Set Point + 4K Set Point

Compressor Condenser Fan Motor

ON

3 min

OFF

3 min

When the compressor turns off during normal control, it has a mandatory 3 minute delay before startup. For example, if the compressor turns off by its thermistor and the door is opened immediately after (causing the cabinet temperature to immediately exceed the restart temperature), the compressor will still not start until 3 minutes have passed since its shutdown. [g] HIGH PRESSURE SWITCH (HFE series, HRFE series - freezer) Pressure Switch

4.0 MPa

Set Point

Compressor Condenser Fan Motor

3.0 MPa ON OFF

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[h] CHECKING SET POINT TEMPERATURE Note: See “5. CONTROLLER” for the operation panel key locations. HRE series, HRFE series - refrigerator Press and hold the up key on the operation panel to display the set point temperature on the screen. When releasing the up key, the screen displays the cabinet temperature again. HFE series, HRFE series - freezer Press and hold the set key on the operation panel for 3 seconds to display “SEt” on the screen. Press the set key again to display the set point temperature on the screen. After 10 seconds, the screen displays the cabinet temperature again. ● Use the controller on the left side to set the refrigerator compartment temperature. Refer to the standard model instruction manual for temperature setting details. ● Use the controller on the right side to set the freezer compartment temperature. Refer to the standard model instruction manual for temperature setting details. Note: The right side controller has a darker display than the left side controller, but is not defective. HRFE-77MA R

HRFE-127 / 147MAF F

R

HRFE-187MAF R

F

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F

R: Refrigerator F: Freezer

[i] MANUAL DEFROST To start the manual defrost cycle, press the defrost/rest key (HRE series, HRFE series refrigerator) or defrost key (HFE series, HRFE series - freezer) for 3 seconds. The defrost indicator light on the operation panel comes on when the defrost cycle starts. [j] ERROR CODES HRE series, HRFE series - refrigerator Code Possible Cause E1 Cabinet sensor (interior thermistor) error E2 Evaporator (defrost thermistor) error

Operation and Remedy Compressor shuts down. Press any key to stop beep. When troubleshooting is over, system recalculates compressor delay time. See “III. 1. ERROR CODES” for further details. Defrost termination temperature is invalid. Press any key to stop beep. See “III. 1. ERROR CODES” for further details.

HFE series, HRFE series - freezer Code HHH LLL

Possible Cause Operation and Remedy Cabinet sensor Compressor cycles on for 45 minutes (interior thermistor) and off for 15 minutes. Check cabinet error temperature. See “III. 1. ERROR CODES” for further details.

HHH Forcibly finishes defrost cycle at Cabinet sensor * With [6] down key pressed (defrost thermistor) the end of defrost time. See “III. 1. ERROR CODES” for further details. error LLL * With [6] down key pressed

* The code “dF” is not an error code but indicates the unit is in defrost cycle. * When the defrost thermistor is defective, error code will not be displayed without [6] down key being pressed. See “5. [b] HFE SERIES, HRFE SERIES - FREEZER” for operation panel detail.

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4. TIMING CHART [a] STARTUP - CONTROL HRE, HFE, HRFE series

[1] 3 min

Min 3 min

Power Supply

Temp Display

Frame Heater

Compressor Condenser Fan Motor

HRE series HRFE series - refrigerator Interior Fan Motor Interior Thermistor Temp

Set Point Temp + 4 K

Set Point Temp

HFE series HRFE series - freezer 1 min Drain Pipe Heater Interior Fan Motor Interior Thermistor Temp

Set Point Temp + 4 K

Set Point Temp

[1] Standby at Startup Only temperature indication is available for 3 min (not a sign of failure).

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[b] DEFROST HRE series, HRFE series - refrigerator (Off-cycle defrost) Frame Heater Compressor Condenser Fan Motor Interior Fan Motor Detects end of cycle (5°C) Defrost (Interior) Thermistor Temp Defrost (Until Thermistor detects) Temp Display

Temp

HFE series, HRFE series - freezer (Heater defrost) Frame Heater Compressor Condenser Fan Motor Interior Fan Motor Defrost Heater Duct Heater Detects end of cycle [30°C, (20°C for HFE-187MA)] Defrost (Interior) Thermistor Temp

Defrost (Until Thermistor detects) Temp Display

Temp

Drain 10 min

Interior Display FM delay delay 5 min 3 min

"dF"

Temp

* Forced drain water evaporation model only (HRE/HFE)

Evaporation Signal Evaporation Pan Heater Evaporation Pan Thermostat

110°C OFF

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90°C ON

5. CONTROLLER [a] HRE SERIES, HRFE SERIES - REFRIGERATOR [1] [2]

[8]

[3]

[7]

[4]

[6] [5]

Operation Panel

Indicator Lights Indicator Light Set indicator light

Symbol SET

Refrigeration indicator light Defrost indicator light

Status On Off Flash On Off Flash On Off

[1] Defrost Indicator Light [2] Refrigeration Indicator Light [3] Set Key [4] Defrost/Reset Key [5] Set Indicator Light [6] Screen [7] Down Key [8] Up Key

Meaning Parameter setting Measuring and controlling status Parameter check, password input Refrigerating Refrigeration stopped Refrigeration delayed Defrosting Defrost stopped

Parameters Code Function F01 Menu password F02 F03 F04 F05 F06 F07 F08 F09

Set Range Default Unit 00 to 99 55 NC 00: cancel keypad lock function Temperature value setting -2 to 12 1 °C Temperature return difference setting 1 to 15 4 °C Delay time of compressor startup 1 to 15 3 min Cabinet temperature calibration -5 to +5 -1 °C Maximum defrost time 1 to 60 60 min Defrost cycle 1 to 30 6 30 min Defrost termination temperature -20 to +30 5 °C Whether activate evaporator sensor 00: inactivate 1 NC or not 01: activate

Key Functions Key Set key Up key Down key Defrost/reset key

Function Press to enter password input status; Parameter setting mode; SET Switch mode between menu and parameter Press to check set point temperature; Choose menu item; Adjust parameter and password value Press to check evaporator sensor value; Choose menu item; Adjust parameter and password value Exit parameter setting status; Manually start or stop defrosting 35

Operations 1. Under temperature measuring and controlling status: 1) Press the set key for 3 seconds: When the keypad password is set as “0”, the set indicator light comes on and the screen displays the “F01” menu. There is no password authentication, so directly enter the menu mode to set parameter. When the keypad password is not set as “0”, the set indicator light flashes and the screen displays “00”. Press the up or down key to input the password. Press the set key to confirm the password input. Then, the system enters the menu setting status if the password is correct. If the password is incorrect, the set indicator light goes off and the system goes back to the normal measuring and controlling status. 2) Parameter check: Press the up key. The set indicator light flashes and the screen displays the set point temperature. Press the down key. The set indicator light flashes and the screen displays the temperature of the evaporator sensor. 2. After entering the menu setting status, press the up or down key to choose the desired menu item (from F01 to F09). 3. After choosing the desired menu item, press the set key to set parameter value. Press the up or down key to adjust parameter value, and then repress the set key to go back to the menu setting status. 4. Under the setting status, press the defrost/reset key or perform no operation for 30 seconds. The system will save the parameters and exit from the parameter setting mode. 5. Press the defrost/reset key for 3 seconds to start or stop the manual defrost cycle. Output Control 1. Compressor: The compressor starts up when the delay time runs out, if the measured temperature is higher than the “fixed temperature value + temperature return difference”. The compressor stops running when the measured temperature is lower than the set point temperature. 2. Defrosting: Defrosting starts automatically according to the defrost cycle setting, or can be started manually. If the evaporator sensor is activated and the evaporator sensor temperature is higher than the defrost termination temperature, the manual start is not available.

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When the cabinet sensor errors happen, the controller will flashing indicate the alarm code E1, with the buzzer doing nothing; close the compressor, when the troubleshooting is over, system will recalculate the compressor delay time. Defrosting automatically when evaporator reaches defrost When stops the door-trip alarms, the the controller will temperature flashing indicate thethe alarm code termination temperature or when the defrost time runs out, or can be stopped manually. E2, with the buzzer ringing after running the time of "F5". If the evaporator sensor is not activated or in error, defrosting stops when the defrost time runs out, or can be stopped manually.

Alarm code

Reason

Output mode

Sensor Error Alarm Close the compressor, when the Cabinet sensor Alarm Code Possible Cause Operation E1 troubleshooting is over, system will error(interior E1 Cabinet sensor Compressor shuts down. When troubleshooting is recalculate compressor delay time. thermistor) error over, system the recalculates compressor delay time. defrosting termination temperature E2 Evaporator sensor (defrostThe Defrost termination temperature is invalid. is E2 thermistor) Evaporator error error invalid.

NinthǃWiring Wiring Diagramdiagram:

Interior

Defrost

TenthǃSafety Rules: ƾ Dangerous˖ 1ǃStrictly distinguish the sensor down-lead, power wire and output interface of the relay, and prohibit wrong connections or overloading the relay. 6

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[b] HFE SERIES, HRFE SERIES - FREEZER [8]

[3] [2] [1]

[1] Fan Indicator Light [2] Set Indicator Light [3] Refrigeration Indicator Light [4] Defrost Indicator Light [5] Defrost Key [6] Down Key [7] Up Key [8] Set Key

[7] [6] [5] [4]

Operation Panel

Indicator Lights Indicator Light

Symbol

Refrigeration

Defrost

Fan Set Celsius

SET C

Status On Off Flash Quick flash On Off Flash Quick flash On Off Flash On Off On Off

Meaning Compressor running Compressor stopped Compressor delayed Manual refrigeration Defrosting Defrost stopped Defrost drain Manual defrost Fan running Fan stopped Fan delayed Setting mode Normal mode Celsius display under normal mode Fahrenheit display under normal mode

Key Functions and Setting Modes Key Operation Set

Function 1 (Normal Mode)

Function 2 (User Setting Mode)

Function 3 (Administrator Setting Mode) Save parameter and return Enter parameter setting to setting interface Exit setting Exit setting

Set (3 sec) Enter user setting Set + Down (10 sec) Enter administrator setting Down Check menu item Down (3 sec) Fast forward menu item Up Upload copy key Check menu item Start/stop forced Up (3 sec) Fast rewind menu item *See Note refrigeration Defrost (3 sec) Start/stop manual defrost Up + Down (10 sec) Lock key operation

Calibrate parameter Quickly calibrate parameter Calibrate parameter Quickly calibrate parameter

Note: Do not use “Up (3 sec)” in normal mode because defrost cycle may not start. If “Up (3 sec)” key operation starts forced refrigeration, defrost cycle will not start until temperature reaches set point. During forced refrigeration, [3] refrigeration indication light will flash quickly. Forced refrigeration can be cancelled by “Up (3 sec)” key operation. After cancellation, defrost cycle will automatically start.

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Administrator

User

Parameters (Items with * are to be changed to administrator menu later.) Menu Item Range Default Remark SEt Min temp setting to max temp setting -20 Temp parameter setting *HY 1 to 25°C 4 Return difference setting *MdF 0 to 255 min 60 Defrost time *IdF 0 to 120 hrs 6 Defrost cycle LS -45.5°C to SEt -23 Min temp setting US SEt to 99.9°C -7 Max temp setting ot -10 to +10°C -1 Room temp calibration oE -10 to +10°C 0 Defrost temp calibration AC 0 to 50 min 3 Compressor delay time Interior thermistor error CON 0 to 255 min 45 compressor ON time Interior thermistor error CoF 0 to 255 min 15 compressor OFF time CF °C: Celsius, °F: Fahrenheit °C Temp measurement unit EL: 0 (Electric heating) tdF EL Defrost type HtG: 1 (Thermal) Defrost termination temp 30 (except HFE-187MA) dtF -45.5 to +49.9°C Defrost termination temp 20 (only HFE-187MA) Rt: 0 (Normal display of room temp) It: 1 (Defrost start temp) dFd dEF Display delay after defrosting SEt: 2 (Display set point) dEF: 3 (Display dF) Display delay time after dAd 0 to 255 min 18 defrosting Fdt 0 to 255 min 10 Draining time after defrost dPo y: 0 (Immediately), n: 1 (Later) n Defrost cycle at initial startup Defrost delay after forced dAF 0 to 24 hrs 0 refrigeration C-N: Start/stop with compressor, OFF when defrosting O-N: Continuous, OFF when defrosting FnC O-N Fan operation mode C-Y: Start/stop with compressor, ON when defrosting O-Y: Continuous, ON when defrosting Fnd 0 to 255 min 15 Fan delay after defrosting Forced startup by difference FCt 0 to 50°C 50 between room temp and evaporator temp ALU ALL to 110°C 110 Upper alarm temp limit ALL -45.5°C to ALU -45.5 Lower alarm temp limit ALd 0 to 255 min 15 Temp alarm delay Temp alarm delay after dAo 0 to 24 hrs 1 energized Cot 0 to 255 min 0 Thermistor error delay FSt -45.5 to 49.9 40 Fan stop temp 39

Operations 1. Compressor functions: A. Under electric heating defrost mode: Start condition: Compressor relay closes when both a) and b) or both a) and c) are met. a) Compressor delay time exceeds the set delay time. b) Forced refrigeration starts when the room temperature is higher than the set point temperature. c) Under non-defrost mode, the room temperature is higher than the set point temperature + return difference. Stop condition: Compressor relay opens when any of the following conditions is met. a) Room temperature is lower than the set point temperature. b) At the start of defrost cycle. c) Forced refrigeration stops. B. Under thermal defrost mode: Start condition: Compressor relay closes when both a) and b), both a) and c) or both a) and d) are met. a) Compressor delay time exceeds the set delay time. b) Under non-defrost mode, the room temperature is higher than the set point temperature + return difference. c) Forced refrigeration starts when the room temperature is higher than the set point temperature. d) In defrost cycle. Stop condition: Compressor relay opens when any of the following conditions is met. a) Room temperature is lower than the set point temperature. b) At the end of defrost cycle. c) Forced refrigeration stops, and defrost cycle does not start immediately. 2. Defrost functions: Defrost relay closes when the following conditions are met. a) Defrost delay time meets the set delay time. b) Defrost thermistor temperature is lower than the defrost termination temperature. c) Defrost cycle ends or manual defrost starts. Defrost relay opens when any of the following conditions is met. a) Defrost time runs out. b) Defrost thermistor temperature is higher than the defrost termination temperature.

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3. Fan functions: Fan relay closes when any of the following conditions is met. a) Defrost temperature is higher than the fan stop temperature; Difference between room temperature and evaporator temperature is more than the set difference. b) Operation mode “0”; Compressor starts; Defrost thermistor temperature is lower than the fan stop temperature; Fan delay time after defrost exceeds the set value. c) Operation mode “1”; Under non-defrost mode, the defrost temperature is lower than the fan stop temperature; Fan delay time after defrost exceeds the set value. d) Operation mode “2”; When the compressor is running or during defrost cycle, the defrost temperature is lower than the fan stop temperature; Fan delay time after defrost exceeds the set value. e) Operation mode “3”; Defrost temperature is lower than the fan stop temperature. Fan relay opens when the following conditions are met. a) Defrost temperature is higher than the fan stop temperature; Difference between room temperature and evaporator temperature is less than the set difference. b) Operation mode “0”; Compressor stops or defrost starts. c) Operation mode “1”; Defrost starts. d) Operation mode “2”; Compressor stops. 4. Alarm functions: LED flashes and displays alarm information when the room temperature exceeds the upper or lower alarm temperature limit and the set alarm delay time runs out. LED displays “HHH” when the room temperature exceeds the upper limit of measured temperature or the thermistor short-circuits and runs out of the thermistor error delay time. LED displays “LLL” when the room temperature is lower than the lower limit of measured temperature or the thermistor short-circuits and runs out of the thermistor error delay time. 5. Copy key operations: Under the controller power-on mode, plug in the copy key and press the up key to display “UPL”. At this time, press the set key to upload the parameters to the copy key. LED displays normal temperature after uploading. Then, turn off the controller and unplug the copy key. LED flashes and displays “err” if there is any error while uploading. Under the controller power-off mode, plug in the copy key and turn on the controller. At this time, the controller automatically detects the copy key and downloads the parameters. LED displays “DOW” while downloading and “End” after downloading. Then, turn off the controller and unplug the copy key. Restart the controller. LED flashes and displays “err” if there is any parameter error or controller model error. 6. Key lock functions: Under normal mode, press and hold the up and down keys at the same time for 10 seconds to turn on/off the key lock. At this time, LED displays the key lock on/off mode. Release the up and down keys. LED displays normal temperature. All the parameters can be checked but cannot be modified.

41

Wiring Diagram

Defrost Thermistor

Interior Thermistor

 Safety Rules ★ Dangerous: 1、Strictly distinguish the sensor down-lead, power wire and output interface of the relay, and prohibit wrong connections or overloading the relay. 2、It must cut off the power supply before any connecting of the wire terminals. ★Warning: Prohibit using the machine under the environment of over damp, high temp., strong electromagnetism interference or strong corrosion. ★Notices: 1、The power supply should conform to the voltage value indicated in the instruction , and make sure the power supply steady. 2、To avoid the possible interference, the sensor down-lead and power wire should be kept a distance.  Size 1、Product size:75*34.5*85mm

2、Mounting size:71*29mm

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III. SERVICE DIAGNOSIS 1. ERROR CODES [a] HRE SERIES, HRFE SERIES - REFRIGERATOR Code Display Error Description Possible Cause E1 E1 only Interior Interior thermistor • Interior thermistor thermistor is defective. circuit open, defective Compressor stops. connector unplugged Beeper sounds. • Interior thermistor circuit shorted, dusty connector E2 E2 and Defrost Defrost thermistor • Defrost Thermistor circuit open, temperature thermistor is defective. alternately defective Defrost cycle ends connector unplugged by timer control. • Defrost Thermistor Beeper sounds. circuit shorted, dusty connector

Reset • Press any key to stop beep • Automatically resets after cause is removed

• Press any key to stop beep • Automatically resets after cause is removed

[b] HFE SERIES, HRFE SERIES - FREEZER Display Error Description Possible Cause Reset Interior Repeats starting • Interior thermistor • Automatically HHH thermistor and stopping resets after circuit shorted, defective operation at certain dusty connector cause is removed interval. Repeats starting • Interior thermistor • Automatically resets after circuit open, LLL and stopping cause is operation at certain connector removed unplugged interval. • Defrost Thermistor • Automatically Defrost Forcibly finishes resets after HHH thermistor defrost cycle at the circuit shorted, cause is * With [6] down defective end of defrost time dusty terminal removed key pressed and starts normal operation. • Defrost Thermistor • Automatically Forcibly finishes resets after LLL defrost cycle at the circuit open, cause is * With [6] down end of defrost time connector removed unplugged key pressed and starts normal operation. * When the defrost thermistor is defective, error code will not be displayed without [6] down key being pressed. See “II. 5. [b] HFE SERIES, HRFE SERIES - FREEZER” for operation panel detail.

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2. FLOWCHART [a] HRE SERIES, HRFE SERIES - REFRIGERATOR PROBLEM No refrigeration

PROBLEM Compressor will not start

Compressor starts and stops

POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS")

No temp indication

[1] Safety Breaker

OFF

[2] Controller

Open circuit, connector unplugged

E1 error indication

[4] Interior Thermistor

Abnormal resistance, bad contact

No error indication

[4] Interior Thermistor

Abnormal resistance, bad contact

[7] Compressor

Winding open, electrical part defective

No error indication

Ambient temp too high

immediately

Condensing capacity insufficient

Compressor runs with

E2 error indication

no refrigeration

(frosted evaporator) No error indication

Heat source, ventilation

[14] Air Filter

Clogged

[8] Condenser Fan Motor

Locked, open circuit

[4] Interior Thermistor

Location

[7] Compressor

Locked, etc

[5] Defrost Thermistor

Abnormal resistance, bad contact

Ambient temp too high Condensing capacity insufficient

Heat source, ventilation

[14] Air Filter

Clogged

Internal load too large Door gap [4] Interior Thermistor

Location

[9] Interior Fan Motor

Open circuit, defective

[2] Controller

Defective

[12] Refrigeration Circuit

Capillary, drier

[13] Refrigerant Leak

Poor refrigeration

Slow refrigeration

Locked, open circuit

[7] Compressor

Defective

Set point is reached

Interior overloaded

Set point is not reached

See "Compressor runs with no refrigeration" above

Normal temp indication

Interior overloaded

with poor refrigeration

Heat load inside [9] Interior Fan Motor

Open circuit, defective

[2] Controller

Defective

[4] Interior Thermistor

Abnormal resistance, bad contact, location

Defrost cycle setting readjusted

Too long

[5] Defrost Thermistor

Abnormal resistance

Compressor runs continuously

[4] Interior Thermistor

Location

Normal temp indication

[4] Interior Thermistor

Abnormal resistance

[2] Controller

Defective

Frosted evaporator

Excessive refrigeration

[8] Condenser Fan Motor

No error indication

Cold air outlet loaded Cold air inlet blocked Ambient temp too low

Abnormal noise

[7] Compressor [8] Condenser Fan Motor [9] Interior Fan Motor [2] Controller

44

Beep with thermistor error [4] [5]

PROBLEM Condensation

PROBLEM

POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS")

Frame heater is not energized

Open circuit

Frame heater is energized Water leak from rear

Drain water is not evaporated

Duty ratio too high Sheath heater is not energized

45

[17] Cam Timer (HRE only)

Open circuit, defective

[16] Thermostat

Contact

[3] Relay

Output

[11] Thermal Fuse

Conductivity

[15] Sheath Heater

Open circuit, defective

[b] HFE SERIES, HRFE SERIES - FREEZER PROBLEM No refrigeration

PROBLEM Compressor will not start

Compressor starts and stops

POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS")

No temp indication

[1] Safety Breaker [2] Controller

Open circuit, connector unplugged

No error indication

[4] Interior Thermistor

Abnormal resistance, bad contact

No error indication

OFF

[6] Pressure Switch

Defective

[3] Relay

Output

[7] Compressor

Winding open, electrical part defective

Ambient temp too high

immediately

Condensing capacity insufficient

Heat source, ventilation

[14] Air Filter

Clogged

[8] Condenser Fan Motor

Locked, open circuit

[3] Relay

Output

[6] Pressure Switch

Defective

[4] Interior Thermistor

Location

[7] Compressor

Locked, etc

[5] Defrost Thermistor

Open circuit, short circuit

See II. 5. [b] and III. 1.

[11] Thermal Fuse

Blown out

LLL, HHH error indication

[4] Interior Thermistor

Open circuit, short circuit

[2] Controller

Hold down Up Key for 3 seconds to cancel

Compressor runs with

LLL, HHH error indication

no refrigeration

(Down Key pressed)

(No button operation) See III. 1. Refrigeration Indicator Light flashes quickly every

forced refrigeration. After cancellation,

0.5 second (No button

defrost cycle starts automatically.

operation) See II. 5. [b]. No error indication

Ambient temp too high Condensing capacity insufficient

Heat source, ventilation

[14] Air Filter

Clogged

Internal load too large Door gap [4] Interior Thermistor

Location

[9] Interior Fan Motor

Open circuit, defective

[2] Controller

Defective

[12] Refrigeration Circuit

Capillary, drier

[13] Refrigerant Leak

Poor refrigeration

Slow refrigeration

[8] Condenser Fan Motor

Locked, open circuit

[7] Compressor

Defective

[10] Defrost Heater

Open circuit, defective

Set point is reached

Interior overloaded

Set point is not reached

See "Compressor runs with no refrigeration" above

Normal temp indication

Interior overloaded

with poor refrigeration

Heat load inside

Frosted evaporator

High cabinet temperature

LLL, HHH error indication

after defrost

(Down Key pressed)

[9] Interior Fan Motor

Open circuit, defective

[2] Controller

Defective

[4] Interior Thermistor

Abnormal resistance, bad contact, location

Defrost cycle setting readjusted

Too long

[5] Defrost Thermistor

Abnormal resistance

[10] Defrost Heater

Open circuit, defective

[11] Thermal Fuse

Blown out

[5] Defrost Thermistor

Open circuit, short circuit

[5] Defrost Thermistor

Location

See II. 5. [b] and III. 1. No error indication

46

PROBLEM

PROBLEM

Excessive refrigeration

Compressor runs continuously

Compressor stops

POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS")

High temp indication

[4] Interior Thermistor

Location

Normal temp indication

[4] Interior Thermistor

Abnormal resistance

[2] Controller

Defective

No error indication

Cold air outlet loaded Cold air inlet blocked Ambient temp too low

LLL, HHH error indication

[4] Interior Thermistor

Open circuit, defective

(Normal condition) See III. 1. Abnormal noise

[7] Compressor [8] Condenser Fan Motor [9] Interior Fan Motor

Condensation

Frame heater is not energized

Open circuit

Frame heater is energized Water leak from rear

Drain water is not evaporated

Duty ratio too high Sheath heater is not energized

[17] Cam Timer (HRE only)

Open circuit, defective

[16] Thermostat

Contact

[3] Relay

Output

[11] Thermal Fuse

Conductivity

[15] Sheath Heater

Open circuit, defective

3. COMPONENTS CHART NO. COMPONENT [1] Safety Breaker [2]

Controller

[3]

Relay

[4]

Interior Thermistor

[5]

[6]

CHECK Safety breaker trips Safety breaker splashed with water Open circuit Input/output (interior fan motor) See wiring label Connector disconnected Connector dusty/dirty 7 segment display partially/totally off Electronic parts defective/burnt out Fast-on terminal/pin disconnected Connector dusty/dirty Open circuit Output to each load Check with wiring diagram/timing chart Abnormal noise Location (holder in front of evaporator) Disconnected, replaced with defrost thermistor, etc Incorrect temp indication

(HRE series)

Short circuit (temp displayed as "E1")

(HFE series)

Open circuit (temp displayed as "E1") Short circuit (temp displayed as "HHH")

Defrost Thermistor

Open circuit (temp displayed as "LLL") Location (plug in from evaporator back) Disconnected, replaced with interior thermistor, etc Abnormal resistance

(HRE series)

Short circuit (temp displayed as "E2")

(HFE series)

Open circuit (temp displayed as "E2") Short circuit (temp displayed as "HHH")

Pressure Switch

Open circuit (temp displayed as "LLL") Open circuit

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REMEDY Locate earth leakage/short circuit Dry and replace if necessary Correct or replace Replace Correct Remove Replace Correct Remove Correct Replace Correct Immerse in ice water to check resistance (25 - 30k) Replace if necessary Clean/dry connector Replace Replace Clean/dry connector Replace Replace Correct Immerse in ice water to check resistance (25 - 30k) Replace if necessary Clean/dry connector Replace Replace Clean/dry connector Replace Replace Replace

CHART NO. COMPONENT [7] Compressor

CHECK Resistance between terminals

REMEDY

Compressor

[8]

[9]

[10] [11] [12] [13]

[14] [15] [16]

Winding resistance (Ω) Start Run AE2360Y 22.37 11.49 AEA2410Y    21.29 7.00 AE2420ZK-SR   17.70 6.10 AE2432ZK    8.56     3.26 AEA2413Y    17.00 4.20 SC21CL 14.4 3.4 SC12CL 13.7 5.0 TL4G 18.2 15.1 FR8.5CL 12.0 7.3 AE1350Y-2 29.77 9.68 AE2390Y-2 17.40 5.40 AE2411Y-2SR 10.39 4.57 AE2428ZK-2SR 6.30 3.10 SC18CLX.2 9.5 2.6 Abnormal noise Insufficient compression (discharge temp too low) Compressor electrical part defective - Run/start capacitor ruptured/deformed - Capacitor defective Check resistance between terminals Gradually reduces: No problem 0 from start: Defective - Starter defective Loose terminal, no conductivity, damaged - Overload relay defective Loose terminal, no conductivity, damaged Condenser Fan Motor Open circuit Locked (not rotating with voltage) Abnormal noise Burning smell Interior Fan Motor Open circuit Locked (not rotating with voltage) Abnormal noise Burning smell Defrost Heater Open circuit Conductivity Insulation resistance 1MΩ or more at 500V Thermal Fuse Conductivity Contact welding of relay Refrigeration Circuit Discharge pressure: High Clogged Suction pressure: Low (vacuum) Refrigerant Leak Discharge pressure: Low Suction pressure: Low Compressor discharge pipe will not heat up Compressor suction pipe will not cool down Air Filter Clogged Sheath Heater * Open circuit Conductivity Insulation resistance 1MΩ or more at 500V Thermostat * Open circuit Conductivity Air-Cooled Condenser Dirty fins

Replace

*Forced drain water evaporation model only

48

Replace if no gas leaks Replace

Correct Replace Correct Replace Correct Replace Replace Replace relay Replace capillary/expansion valve (Replace drier at same time) Locate leakage and replace (Replace drier at same time) Clean Correct Replace Replace Correct Replace if not conductive

4. CONTROLLER [a] SERVICING CONTROLLER 1) When receiving a service call, ask the user to turn off the power supply and turn it back on after 30 seconds, while watching the unit. This will reset the controller, and in some cases normal operation will resume. 2) Keep the following in mind when servicing the controller: * Check that the unit has been earthed properly. If not, the controller will not work properly. * To get static free, always touch the cabinet (earth) before servicing. Electrostatic discharge will cause severe damage to the controller. * The controller and thermistor can be replaced separately. * Do not drop the controller on the floor. * The thermistor and pressure switch leads have a thin coating and are potentially breakable. Do not tension the leads. * The connectors must not be subjected to tension to prevent disconnection or breakage. After servicing the controller, check for disconnected connectors. * The thermistor is provided with single-wire leads. Do not bend or stretch them. * Do not pinch or weigh down the thermistor and thermistor leads. The coatings may be broken, resulting in a short circuit.

49

[b] CHECKING THERMISTOR 1) Remove the thermistor from the controller. 2) Put ice and water in a glass or other container to make 0°C water. Immerse the thermistor bulb in the water for 5 minutes (at the center of the container). 3) Use the Ω range of the tester to measure the resistance between the thermistors. 4) If the measured resistance is not within 25 - 30 kΩ (standard 27 kΩ), replace the thermistor (see the T-R curve below). T-R Curve (Interior/Defrost Thermistor) The graph shows reference values only and may differ from actual values.

120 110 100 90

R (kΩ)

80 70 60 50 40 30 20 10 0 -40 -30 -20 -10 0

10 20 30 40 50 60 70 80

Temperature (°C)

50

IV. REMOVAL AND REPLACEMENT OF COMPONENTS 1. CONTROLLER AND THERMISTOR [a] CONTROLLER 1) Unplug the unit. 2) Loosen the screw at the rear.

3)

3) Remove the two screws at both sides to take off the control box cover. 4) Use a precision screwdriver to remove the wiring cover and wiring. 5) Push the stoppers at both sides of the controller, and slide off the stoppers to the rear.

3)

3) 6) 5)

5)

6) Remove the controller to the front. 7) To replace the removed parts, reverse the above procedure.

2)

Controller

Rear view (HFE-77MA)

8) Check that the operation panel is securely mounted. [b] THERMISTOR 1) Remove the air duct inside the cabinet. See “3. [a] AIR DUCT”. 2) Remove the interior thermistor bulb on the ceiling in front of the evaporator by unhooking the two tabs securing the thermistor holder. 3) Remove the defrost thermistor bulb inside the evaporator fins by pinching off the thermistor holder. 4) Pull out the thermistors through the hole in the refrigeration unit base. Be careful not to press hard on the bulbs and leads. 5) Remove the control box cover, use a precision screwdriver to loosen the terminal block screws, and remove the thermistors. Note: 1. To replace the removed parts, reverse the above procedure.

2. To prevent the evaporator from freezing, putty the wire hole in the refrigeration unit base.

51



3. If the defrost thermistor color is not white, wind white vinyl tape around the thermistor as shown below for indication. Sensor

Vinyl Tape (White)

Terminal Side

Interior Thermistor Bulb Location

Interior Thermistor

Defrost Thermistor Bulb Location HRE HRFE-127,147,187MAF - refrigerator

Defrost Thermistor

Bottom HFE HRFE-77MA, 127,147,187MAF - freezer

70

Fan Motor Side 150

Bottom

Defrost Thermistor

Fan Motor Side

52

HRFE-77MA - refrigerator

Defrost Thermistor

Interior Thermistor

53

2. REFRIGERATION CIRCUIT For HRFE-77MA, it is structurally difficult to replace the whole refrigeration circuit. Replace the individual parts. [a] COMPRESSOR 1) Unplug the unit. 2) Remove the front panel. 3) Remove the top panel. 4) Remove the protector cover enclosing the electrical parts. Remove the overload relay, starting relay, and other parts. 5) Recover the refrigerant from the low side access valve. 6) Disconnect the discharge and suction pipes by using brazing equipment. 7) Remove the hexagon bolts securing the compressor. 8) To replace the removed parts, reverse the above procedure. [b] CONDENSER AND DRIER 1) Unplug the unit. 2) Remove the front panel. 3) Recover the refrigerant from the low side access valve. 4) Unscrew the condenser. 5) Disconnect the condenser from the upper inlet pipe connection using brazing equipment. 6) Remove the condenser and drier from the refrigeration unit base, and disconnect them using brazing equipment. 7) To replace the removed parts, reverse the above procedure. Note: The capillary tube is directly brazed to the drier. To prevent brazing material from clogging, be sure to insert the capillary tube securely into the point of stopper before brazing.

54

[c] EVAPORATOR 1) Unplug the unit. 2) Remove the front panel. 3) Recover the refrigerant from the low side access valve. 4) Remove the insulation hoses on the refrigeration unit base. Disconnect the evaporator using brazing equipment. 5) Remove the air duct. 6) Disconnect the defrost heater wires. See “[e] DEFROST HEATER AND THERMAL FUSE”. 7) Unscrew and remove the evaporator. 8) To replace the removed parts, reverse the above procedure. [d] CONDENSER FAN MOTOR 1) Unplug the unit. 2) Remove the front panel. 3) Disconnect the condenser fan motor. 4) Remove the two screws securing the bracket on the refrigeration unit base. 5) Pull up the fan motor together with the bracket. 6) Loosen the nut securing the fan motor shaft, and remove the fan motor. 7) Remove the fan motor from the bracket. 8) To replace the removed parts, reverse the above procedure. Note: After replacement, check for abnormal noise or vibration noise by trial run.

55

[e] DEFROST HEATER AND THERMAL FUSE 1) Unplug the unit. 2) Disconnect the defrost heater at the back of the refrigeration unit. The defrost heater and thermal fuse are connected in series and interchangeable without any operational problems. 3) Remove the putty from the wire hole in the refrigeration unit base, and put the connector through the hole.

Thermal Fuse

Bracket Evaporator

Defrost Heater

4) Remove the air duct. See “3. [a] AIR DUCT”. 5) Remove the supports at both ends of the evaporator bottom by loosening the screws at the front and unhooking the backside.

Support

6) Remove the defrost heater from the evaporator by pulling each U bend from the front to the back. 7) Unscrew and remove the thermal fuse from the evaporator and bracket. 8) Pull out the wire through the hole in the refrigeration unit base. 9) To replace the removed parts, reverse the above procedure. Note: Locate the defrost heater in the same position as before. Fit the first front line into the first slot channel, and position the rest according to the U-bend dimensions. Front

Fit into the first slot channel

56

3. AIR DUCT [a] AIR DUCT 1) Remove the screws securing the air duct. 2) Hold both sides of the air duct, and pull it out towards you. The air duct for the HFE series is provided with a gasket in the drain pipe and must be pulled hard to remove. 3) To prevent tension on the wires, place the removed air duct on a shelf. 4) To replace the air duct, first insert the drain pipe into the drain outlet at the rear of the unit. 5) Fit the air duct in the back. 6) Tighten all the screws. Note: Be careful not to catch the interior fan motor leads in the air duct.

Gasket (HFE only)

57

[b] INTERIOR FAN MOTOR (Except HRFE-77MA) 1) Unplug the unit.

Fan Motor

2) Disconnect the interior fan motor connector beside the refrigeration unit.

Air Duct

3) Unscrew the refrigeration unit.

Insulation Tube

4) Slightly lift up the refrigeration unit, and put the interior fan motor leads inside the cabinet. 5) Remove the air duct.

Fan

6) Loosen the screws securing the fan cover, and remove the fan cover.

Fan Cover

7) Remove the interior fan motor from the air duct. 8) To replace the removed parts, reverse the above procedure. Keep the fan 5 mm from the end of the motor shaft as shown. Cover the interior fan motor leads with the insulation tube as a cushion through the hole in the refrigeration unit. Note: To prevent the leads from being caught between the fan blades, fix the leads with the wire retainer inside the air duct before fitting the air duct.

58

Wire Retainer

[c] INTERIOR FAN MOTOR (HRFE-77MA) 1) Unplug the unit. 2) Open the door to the refrigerator. Unscrew and remove the cooling duct. 3) Unscrew and remove the interior fan motor assembly. 4) Remove the screws securing the interior fan motor to the bracket, and take off the interior fan motor. 5) Cut the fan motor leads at their connection. (Keep the lead re-connectable.) 6) Loosen the screws securing the fan cover, and remove the fan cover. 7) Remove the interior fan motor from the air duct.

Fan motor assembly

8) To replace the removed parts, reverse the above procedure. Note: 1. To prevent water from coming in, the lead terminals must be caulked and covered with plastic bag. Be sure to connect the leads outside the unit.

2. Seal the lead hole with putty later.

Duct

59

4. DOOR PARTS [a] HINGE SPACER For door closing adjustment, the hinge spacers may be provided between the hinges and cabinet. When removed, the hinge spacers must be reinstalled in the correct position. When the door is replaced or the gasket is often caught in the door, order the following parts and replace the hinge spacers: Hinge Spacer 473352M01 [b] LIFT HINGE To ensure smooth door closing, the hinge shaft employs a lift hinge. If the hinge makes an abnormal noise or the worn out lift hinge hinders smooth door closing, apply White Alcom Grease or equivalent food grade grease. If the lift hinge is severely worn out, replace the hinge collar (lift hinge) on both the door and hinge sides. * Apply White Alcom Grease also when the door is replaced in the field. [c] DOOR GASKET To replace the door gasket: 1) Pinch and pull out the door gasket from the corners. 2) Push the convex of the new door gasket into the concave of the door interior. Insert the corners first to facilitate replacement.

Gasket

Replacement of the door or door gasket may cause a gap between the cabinet and the gasket. To correct this gap, slightly heat the gasket with a drier. To avoid melting the gasket: 1) Keep the drier at least 100 mm away from the gasket. 2) Move the drier up and down to heat the entire gap. Gap

Min 100 mm

60

5. EVAPORATION TANK (Forced drain water evaporation model only) 1) Unplug the unit. 2) Unscrew and remove the rear panel. 3) Unscrew the upper part of the evaporation tank cover, and lift off the cover. [a] DRAIN TANK HEATER 1) Unscrew and remove the drain tank duct. 2) Unscrew the drain tank flange securing the drain tank heater. 3) Cut the drain tank heater leads at their connection. 4) Lift the drain tank heater off the drain tank. 5) Lift off the drain tank heater together with the heater bush from the drain tank flange. 6) Remove the heater bush from the drain tank heater. 7) To replace the removed parts, reverse the above procedure. [b] THERMOSTAT 1) Unscrew the thermostat attached to the drain tank bottom. 2) Cut the thermostat leads at their connection. 3) To replace the removed parts, reverse the above procedure. [c] THERMAL FUSE 1) Unscrew the fuse holder at the drain tank bottom, and remove the thermal fuse. 2) Cut the thermal fuse leads at their connection. 3) To replace the removed parts, reverse the above procedure.

61

6. CONDENSER CLEANING PAN The condenser is designed to allow the cleaning pan at the bottom. * Insert the cleaning pan (wastewater pan), and connect the drain hose to the drain outlet. Use the cleaning pan (A) for the 280 mm wide condenser [HRE / HRFE-77/127/147/187, HFE-77], and connect the cleaning pan (A) and cleaning pan (B) for the 500 mm wide condenser [HFE-127/147/187].

280 mm Cleaning Pan (A)

510 mm Insert Cleaning Pan (B) Cleaning Pan (A)

* Cover the cleaning pan with a waste cloth to prevent wastewater from splashing around (especially the compressor and condenser fan motor). * The cleaning pan has a capacity of about 1 L and takes 1 minute to drain. Do not allow a large amount of water into the cleaning pan. The cleaning pan is not provided in the unit and must be ordered by the following part numbers: 354309G01 354310G01 for connection only

255 mm

Cleaning Pan (A) Cleaning Pan (B)

280 mm

Dimensions: W280 x D255 x H16 (t 0.8) mm Drain Outlet: 16 mm OD x 14 mm ID Drain Hose: 16 mm DIA Capacity: 1.0 L

16 mm 16 mm OD

62

7. OPTIONAL PARTS [a] HINGE KIT The door hinges for HRE-77MA, HFE-77MA and HRFE-77MA can be moved to the other side of the door by using the following hinge kit. Hinge Kit (R) Door Hinge (R) - Lo Door Hinge (R) - Up Door Hinge (R) - CT Hinge Collar - Hinge

375316G01 375317G01 375315G01 339948-01

1 pc 1 pc 1 pc 2 pcs

Hinge Kit (L) Door Hinge (L) - Lo Door Hinge (L) - Up Door Hinge (L) - CT Hinge Collar - Hinge

375319G01 375318G01 375320G01 339948-01

1 pc 1 pc 1 pc 2 pcs

[b] LEG Width Leg H=90 Leg H=150 Leg SUS H=90

P00316-01 446733-01 4Y2043-01

700/1200/1400mm 4 pcs 4 pcs 4 pcs

1800mm 6 pcs 6 pcs 6 pcs

P00635-01 FWPL20F0 471512M01 471513M01

700/1200/1400mm 4 pcs 4 pcs 4 pcs 1 pc

1800mm 6 pcs 6 pcs 6 pcs 1 pc

[c] CASTER Width Caster Plain Washer Spacer - Caster Spanner

To adjust the height of the unit, use the spanner (accessory) to loosen the casters and insert the spacers (accessory). The unit should always be level from side to side and back to front. All the four casters are provided with stoppers. Always lock the stoppers of the front casters when in use. Unlock the casters to move the unit for cleaning or other purposes. Be sure to attach the plain washer (M20) provided before Plain Washer (M20) fixing the caster to the cabinet. The fixing part of caster Caster may deform without the plain washer (M20). 63

Spacer Spanner