GE PSC21MGM Technical Service Manual
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GE PSC21MGM Technical Service Manual

GE PSC21MGM Technical Service Manual

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  • Page 2 If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. GE Consumer Home Services Training Technical Service Guide Copyright © 2001 All rights reserved.

  • Page 3: Table Of Contents

    Table of Contents Introduction ............Installation .

  • Page 4: Introduction

    Introduction The freezer has adjustable shelves, a slide-out 2001 Energy SxS models are being introduced in response to the requirement for more energy- Spillproof shelf, a QuickSpace shelf, and deep efficient refrigerators by mid year 2001, along with door shelves, based on the model. The fresh food section has a baking soda holder, a fruit and feature and operation enhancements.

  • Page 5: Installation

    Installation TAPE ROLLER HEIGHT ADJUSTMENT DOOR HEIGHT ADJUSTMENT Use padded hand truck to protect REMOVE ALL CLEAR PROTECTIVE Connect water lines and power cord. TEMPERATURE CONTROLS ARE refrigerator finish. LEAVE TAPE TAPE FROM TRIMS, then move unit ADJUST FRONT ROLLERS so the PRESET IN THE FACTORY FOR ON DOORS until refrigerator is in into position.

  • Page 6: Specifications

    Refrigerant Charge (R134a) ....... 4.75 ounces Compressor ..........690 BTU/hr Minimum Compressor Capacity ....22 inches Minimum Equalized Pressure @ 70°F ............48 PSIG @ 90°F ............60 PSIG MODELS PSC21MGM PSI21MGM PSC23MGM PSI23MGM REPLACEMENT PARTS Temperature Control ..........wr55x10023 Relay ............... wr07x10031 Overload ..............

  • Page 7: Nomenclature

    H = HOTPOINT T = TROPICAL I = DELUXE GLASS D = CUBED ICE/WATER AA = ALMOND/ALMOND P = PROFILE (GE) GLOBALT J = PREMIUM GLASS E = CUBED & CRUSHED ICE/ WATER BB = BLACK/BLACK E = ETERNA (GE) K = SPILLPROOF GLASS F = 6 MO.

  • Page 8: Warranty Information

    Warranty Information Sales slip or cancelled check is required as proof of original purchase date to obtain service under warranty. All warranty service is provided by our Factory Service Centers or an authorized Customer Care® technician. l l i t l i f r t r s l i l l i...

  • Page 9: Operating Characteristics

    Operating Characteristics Table of Contents Fresh Food/Freezer Independent Operation ......8 Normal Operating Characteristics, but Different from Previous Models ..8 Abnormal Operating Characteristics (Incorrect Operation) .

  • Page 10: Fresh Food/Freezer Independent Operation

    Fresh Food/Freezer Independent Abnormal Operating Characteristics Operation (Incorrect Operation) In previous models, the fresh food and freezer • Fresh food fan on and evaporator fan off. compartment components worked at the same • Evaporator fan on, fresh food fan and time.

  • Page 11: Cooling Operation (Adaptive Defrost)

    Cooling Operation (Adaptive Defrost) than 20 minutes. Typical defrost time is 20-30 minutes. During the cooling operation, the main control The defrost system is protected by a defrost board monitors door opening (fresh food and thermostat (switch). The thermostat opens when freezer doors) and compressor run times.

  • Page 12: Electronic Icemaker

    Electronic Icemaker Door Alarm This refrigerator is equipped with an Electronic The DOOR ALARM pad is used to turn on and Icemaker. Refer to Pub # 31-9063 for more turn off the door alarm feature. If the feature is on, information.

  • Page 13: Filters

    Filters Airflow (Cabinet Interior) The FreshSaver filter is located on the FRESH AIR FLOW PRODUCE drawer and will last for 1 year. Some models are equipped with a FreshSaver FILTER LED. After 1 year of refrigerator operating time, the FreshSaver FILTER LED will illuminate as a reminder to the owner to change the filter.

  • Page 14: Jelly Roll" Condenser

    “Jelly Roll” Condenser GEA00911 The “jelly roll” condenser is a new type of condenser. The condenser fan is located at one end of the “jelly roll” condenser and a solid plate is located at the other end. Air is drawn in through the outside diameter of the condenser and pulled out by the condenser fan.

  • Page 15: Main Control Board

    Main Control Board THERMISTOR MODEL DAMPER ENCODER COMMUNICATION COILS INPUTS INPUTS SELECT INPUT/OUTPUT INPUTS ACCUMULATED FF AND FRZ DOOR OPENINGS (MINUTES) FAN OUTPUTS COMPRESSOR RUN TIME (MINUTES) DEFROST HEATER ON TIME (MINUTES) PROCESSING UNIT OUTPUTS COOLING PRE-CHILL DEFROST COMPRESSOR DOOR DEFROST SWITCH OUTPUTS...

  • Page 16: General Locator Views

    General Locator Views Temperature Temperature Temperature Controls Controls Damper Damper Freezer Light Freezer Light Switch Switch Evaporator Evaporator Evaporator Evaporator Thermistor Thermistor Thermistor Evaporator Evaporator Fresh Food Fresh Food Thermistor Thermistor Thermistor Freezer Freezer Thermistor Thermistor Thermistor Fresh Food Fresh Food Light Switch Light Switch GEA00979...
  • Page 17 Control Control Board Board Jelly Roll Jelly Roll Water Water Compressor Compressor Condenser Condenser Condenser Condenser Solenoids Solenoids Capacitor Capacitor Overload and Relay Overload and Relay Dryer Dryer (under cover) (under cover) GEA00977 – 15 –...

  • Page 18: Mechanical Disassembly

    Mechanical Disassembly Table of Contents Door Handle ............18 Door Gasket .
  • Page 19 Freezer Light ........... . . 26 Evaporator Fan .

  • Page 20: Door Handle

    Door Handle Fresh Food Compartment Quick Access Door The door handles allow access into the fresh food and freezer compartments. They are front The fresh food compartment allows access to the mounted with 1 Torx head screw. fresh food compartment without opening the fresh food door.

  • Page 21: Fresh Food Door Light Switch

    Fresh Food Door Light Switch In addition to the quick access door light switch, the fresh food compartment has a door light switch located in the lower right corner for the compartment. 1. Use a small flat-blade screwdriver to unlock the locking tab tabs and pull the switch out until the wire connector is visible.

  • Page 22: Water Filter

    GEA00930 Fresh Food Fan and Mullion Damper 2. To access the lower lights, pull the deli fresh The fresh food compartment fan is located under damper adjusting knob off. the upper ductwork in the fresh food compartment. This fan distributes cold air from the freezer via the 3.

  • Page 23: Deli Fresh Damper

    3. Remove the upper water filter cover. 9. Lay the fan and damper assembly against the compartment and open the back cover. 4. Unlock the upper opaque light cover tabs and 10. Disconnect the wire connections and remove remove the cover. the damper or fan.

  • Page 24: Temperature Control Panel

    1. With a small flat-blade screwdriver, unlock the Freezer Door Bins tabs and remove the assembly. The freezer door bins are located on the inside of 2. Remove the thermistor from the cover and the freezer door and tilt out to allow easy access disconnect the wire connector.

  • Page 25: Fresh Food Door Adjustment

    4. With a small flat-blade screwdriver, disengage Fresh Food Door Adjustment the locking tabs of the upper hinge cover and IMPORTANT: The freezer door is not adjustable. remove it. The fresh food door can be adjusted to match the 5. Remove the Torx head hinge screws (2) and height of the freezer door.

  • Page 26: Roller Adjustment

    Roller Adjustment The front (2) rollers are adjustable. Adjust them so that the refrigerator is solid and the doors close easily. 1. Remove the base grille. 2. With a flat-blade screwdriver, turn the adjusting screw clockwise to raise the roller and counterclockwise to lower the roller.

  • Page 27: Ice Dispenser Auger Drive And Cube Solenoid

    Note: Drive fork has reverse threads; turn 6. With 2 small flat-blade screwdrivers, unlock clockwise to remove. the ice crusher locking tabs located at either side of the ice crusher. 3. Remove the fork from the drive motor by turning it clockwise. 7.

  • Page 28: Freezer Light

    2. Remove 1/4-in. ice dispenser drive mounting bracket screws (2) and remove the brackets. Screws Screws Screws Screws GEA00955 Freezer Light GEA00958 The freezer light is located in the upper rear of the freezer compartment. The light is covered by an 3.

  • Page 29: Evaporator Thermistor

    Defrost Thermostat The defrost thermostat is snapped onto the top portion of the evaporator. The thermostat sends temperature information to the processor. The defrost heater must be replaced when replacing the thermostat. 1. Remove the lower fan duct work from the evaporator cover.

  • Page 30: Evaporator Drip Pan

    Evaporator Drip Pan Caution: To prevent damage to the capillary tube, the capillary tube must be desoldered first. The evaporator drip pan is located under the 6. Desolder the capillary tube from the evaporator. This pan catches condensation from evaporator. the evaporator that is generated during the defrost mode of operation.

  • Page 31: Condenser Fan

    Condenser Fan The condenser fan is located in the rear of the unit. It provides forced-draft cooling for the condenser coil. 1. Remove the 1/4-in. back panel access screws (5) and remove the back panel. Locks Locks GEA00969 Water Solenoids When the solenoids receive a signal from the 2.
  • Page 32 Notes – 30 –...
  • Page 33 Notes – 31 –...

  • Page 34: Diagnostics

    Diagnostics Table of Contents Efficient Use of Diagnostics ......... 32 Failure Causes (Table 1) .

  • Page 35: Failure Causes (Table 1)

    t s i t s i t s i u l i u l i u l i u l i c t i u l i c t i u l i y t l y t l y t l y t l u l i ) t i...
  • Page 36 the refrigerator display. When a test code has been entered, the displays will flash to confirm the test code. Press any button other than a temperature adjust button to begin the test. When testing has been completed, do one of the following things: •...

  • Page 37: Communication Tests (0 2, 0 3, Or 0 4)

    o i t o i t o i t - f l - f l - f l - f l l l i f e i , y l l l i l l i l l i l l i o i t s t i .

  • Page 38: Dispenser Board

    Dispenser Board No self diagnostic tests exist for the dispenser board. Dispenser board operation is tested by pressing each button and checking for proper operation. Control and Sensor System Self-Test (0 7) This test checks all five thermistors located throughout the unit. Once the test is initiated, the test code (0 7) will stop flashing and the thermistor test results will appear on the freezer display in the test order listed below.

  • Page 39: Main Control Board (Low-Voltage Side)

    Main Control Board (Low-Voltage Side) 1 - Blk 1 - Yel 1 - Blu / Red 2 - Red 2 - Red / Blk 2 - Yel 3 - Blu 3 - Wht / Brn 3 - Red / Wht 4 - Pur 4 - Blu / Yel 4 - Blu / Wht...

  • Page 40: Main Control Board (120-Vac Side)

    Main Control Board (120-VAC Side) PROCESSING UNIT OUTPUTS COOLING PRE-CHILL DEFROST COMPRESSOR DOOR DEFROST SWITCH OUTPUTS INPUTS 1 - Beige 2 - Sil 3 - Yel 4 - Red / Wht 5 - Blu / Wht 6 - Pur 7 - Red 8 - Not Used 9 - Orn GEA00907...

  • Page 41: Main Control Board Locator Table (Low-Voltage Side)

    o l l o l l o l l c i l c i l – 39 –...

  • Page 42: Main Control Board Locator Table (120-Vac Side)

    o l l n i l n i l n i l o l l n i l – 40 –...
  • Page 43 – 41 –...

  • Page 44: Unit Dead, No Sound & No Cooling (Diagnostic Chart)

    Unit Dead, No Sound & No Cooling Repair wire and connection Advise consumer to call at 6 pin connector ! an electrican! Check for 120VAC at 6 pin Repair or replace Are the interior lights on? Check house supply voltage. connector at rear of unit.

  • Page 45: Fresh Food Warm - Freezer Warm (Diagnostic Chart)

    Fresh Food Warm - Freezer Warm Basic refrigerator checks: Door gasket seal OK? Repair as Door switch - light turning off with door closed? necessary Dispenser duct door closing properly? Run Service Diagnostics Test (0-7) Thermistor check - see page 53 Repair fault Did test check OK? Run Service Diagnostics Test (1-3) Pre-Chill -...

  • Page 46: Fresh Food Warm - Freezer Normal (Diagnostic Chart)

    Fresh Food Warm - Freezer Normal Check control settings and temperatures Food at setting of 5 and 5 with no door Control settings Adjust settings and allow opens for 12 hours should be: require 24 hrs to stabilize Fresh food 34°F to 42°F adjustment Freezer -8°F to +6°F Control settings...

  • Page 47: Fresh Food Too Cold - Freezer Normal (Diagnostic Chart)

    Fresh Food Too Cold - Freezer Normal Check control settings and temperatures Controls at a setting of 5 and 5 with no door Control settings Adjust settings and allow openings for 12 hours should be: require 24 hrs to stabilize Fresh Food 34°F to 42°F adjustment Freezer-8F to 6F...

  • Page 48: Freezer Warm - Fresh Food Normal (Diagnostic Chart)

    Freezer Warm - Fresh Food Normal Check control settings and temperatures Food at a setting of 5 and 5 with no Control settings Adjust settings and allow door openings for 12 hours should be: require 24 hrs to stabilize Fresh food 34°F to 42°F adjustment Freezer -8°F to +6°F Control settings...

  • Page 49: Compressor Not Running (Diagnostic Chart)

    Compressor Not Running Run Service Diagnostic Test ( 1-3 ) Pre-Chill - see page 33 for entering diagnostic mode. Check temperature setting of Is the compressor running? unit Check for 120VAC at connector J7-9 Direct test the Replace orange wire to TAB1 / J11 Black wire. compressor.

  • Page 50: Damper Door Not Opening Or Not Closing (Diagnostic Chart)

    Damper Door Not Opening or Not Closing Run Service Diagnostic Test ( 1-0 ) Damper door test Check damper door phyiscal Damper door good! movement at beginning of test. Look elsewhere for the Does it move? problem Push on damper door to check Damper jammed! manual movement.

  • Page 51: Condenser Fan Not Running (Diagnostic Chart)

    Condenser Fan Not Running Run Service Diagnostic Test (1-3 ) Pre-Chill - see page 33 for entering diagnostic mode. Condenser fan OK! Is the condenser fan running? Look elsewhere for the problem. Condensor motor stalled ! Repair or replace condenser motor. Remove J2 connector from the main board.

  • Page 52: Evaporator Fan Not Running (Diagnostic Chart)

    Evaporator Fan Not Running Run Service Diagnostic Test ( 1-3 ) Pre-Chill - see page 33 for entering diagnostic mode Replace motor Check voltage at J2-3 white wire Replace board and J2-4 yellow and motor wire. Remove J2 harness connector from board and check for Check the resistance on More than 8 vdc? resistance between red wire pin 8 and white wire pin 3 on...

  • Page 53: Fresh Food Fan Not Running (Diagnostic Chart)

    Fresh Food Fan Not Running Fan Motor OK ! Run Service Diagnostic Test ( 1-1 ) Go back to previous flow Did the FF fan run? chart Remove J2 harness connector from board and Check the voltage at the main board J2. check for resistance between red wire J2-8 Motor stalled! Is there at least 8vdc between pins 8 and...

  • Page 54: Heavy Frost On Evaporator (Diagnostic Chart)

    Heavy Frost on Evaporator Run Service Diagnostic Test (1-4) Defrost system check Check door ajar Does defrost heater come on? Customer usage - numerous door openings Check for 120 VAC from Carefully unplug J9 blue connector from Reinstall blue connector neutral orange wire J7 to Replace main board.

  • Page 55: Thermistor Test (Diagnostic Chart)

    Thermistor Test Run Service Diagnostic Test (0-7) Thermistor test - see page 33 for entering diagnostic mode Verify thermistors are within Do all thermistors available on specific proper range using model pass diagnostic test? temperature/resistance chart on page 54 Did diagnostic test show O? Check wiring connections for an open ( open sensor ) circuit.

  • Page 56: Thermistor Values (Table 3)

    Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω Ω 5 Ω 4 Ω Ω Ω Ω Ω Ω Ω NOTE: The thermistor’s resistance has a negative coefficient. As the temperature increases, the thermistor’s resistance decreases. – 54 –...

  • Page 57: Component And Connector Locator Views

    Component and Connector Locator Views Freezer Freezer Thermistor Thermistor Freezer Freezer Light Switch Light Switch Evaporator Evaporator Light Light Defrost Defrost Thermostat Thermostat Evaporator Evaporator Thermistor Thermistor Evaporator Evaporator Defrost Defrost Heater Heater GEA00978 – 55 –...
  • Page 58 Damper Damper Fresh Food Fresh Food Fresh Food Fresh Food Thermistor Thermistor Lights Lights Fresh Food Fresh Food Light Switch Light Switch GEA00980 – 56 –...
  • Page 59 Control Control Board Board Jelly Roll Jelly Roll Water Water Compressor Compressor Condenser Condenser Condenser Condenser Solenoids Solenoids Capacitor Capacitor Overload and Relay Overload and Relay Dryer Dryer (under cover) (under cover) GEA00977 – 57 –...
  • Page 60 Main Control Board (Low-Voltage Side) 1 - Blk 1 - Yel 1 - Blu / Red 2 - Red 2 - Red / Blk 2 - Yel 3 - Blu 3 - Wht / Brn 3 - Red / Wht 4 - Pur 4 - Blu / Yel 4 - Blu / Wht...
  • Page 61 Main Control Board (120-VAC Side) PROCESSING UNIT OUTPUTS COOLING PRE-CHILL DEFROST COMPRESSOR DOOR DEFROST SWITCH OUTPUTS INPUTS 1 - Beige 2 - Sil 3 - Yel 4 - Red / Wht 5 - Blu / Wht 6 - Pur 7 - Red 8 - Not Used 9 - Orn GEA00907...
  • Page 62 Thermistor Locator Evaporator Thermistor Fresh Food (Located on Thermistors Evaporator) Freezer Thermistor GEA00765 – 60 –...

  • Page 63: Schematics And Strip Circuits

    Schematics – 61 –...
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  • Page 65: Illustrated Parts Catalog

    Illustrated Parts Catalog Exploded views of PSS25MGMABB are for general reference Always refer to specific model for latest part information – 63 –...
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  • Page 70 Ref No. Part Number Description WR85X10022 Low Side Assembly – 68 –...
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