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ManualsBrandsSUB-ZERO ManualsRefrigeratorSUB-ZERO ICBBI-42UFDID Over and Under Refrigerator or Freezer

BUILT-IN FAULT CODE TROUBLESHOOTING GUIDE

FAULT CODE TROUBLESHOOTING GUIDE

Code Service

Icon

State

Description and Action

10 1 00 On

Refrigerator cabinet thermistor open.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 1 01 On

Refrigerator cabinet thermistor shorted.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 1 02 On

Refrigerator cabinet thermistor unstable.

Check for bad connections and/or damaged

wires. Repair connection or wire.

10 2 00 On

Freezer cabinet thermistor open.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 2 01 On

Freezer cabinet thermistor shorted.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 2 02 On

Freezer cabinet thermistor unstable.

Check for bad connections and/or damaged

wires. Repair connection or wire.

10 3 00 On

Condenser thermistor open.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 3 01 On

Condenser thermistor shorted.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 3 02 On

Condenser thermistor unstable.

Check for bad connections and/or damaged

wires. Repair connection or wire.

10 3 10 This code is inactive. Please ignore.

10 3 11 This code is inactive. Please ignore.

10 3 12 This code is inactive. Please ignore.

10 7 00

Ambient thermistor open.

Verify temperature reading. Replace control

board if temperature is not correct.

10 7 01

Ambient thermistor shorted.

Verify temperature reading. Replace control

board if temperature is not correct.

FAULT CODE TROUBLESHOOTING GUIDE

Code Service

Icon

State

Description and Action

10 7 02

Ambient thermistor unstable.

Verify temperature reading. Replace control

board if temperature is not correct.

10 F 00 On

Freezer evaporator thermistor open.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 F 01 On

Freezer evaporator thermistor shorted.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 F 02 On

Freezer evaporator thermistor unstable.

Check for bad connections and/or damaged

wires. Repair connection or wire.

10 r 00 On

Refrigerator evaporator thermistor open.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 r 01 On

Refrigerator evaporator thermistor shorted.

Verify temperature reading and ohm thermistor.

Replace thermistor if bad.

10 r 02 On

Refrigerator evaporator thermistor unstable.

Check for bad connections and/or damaged

wires. Repair connection or wire.

10 r 09

Refrigerator evaporator thermistor read higher

than cabinet thermistor by at least 10 degrees.

Error may indicate problem with thermistor or a

unique evaporator issue.

15 1 00

Flash

with

Chime

Refrigerator compressor relay stuck open. No

power to compressor.

Verify refrigerator compressor relay stuck open.

Replace control board.

15 1 01

Flash

with

Chime

Refrigerator compressor relay stuck closed.

Power to compressor at all times.

Verify refrigerator compressor relay stuck

closed. Replace control board.

15 2 00

Flash

with

Chime

Freezer compressor relay stuck open. No power

to compressor.

Verify freezer compressor relay stuck open.

Replace control board.

15 2 01

Flash

with

Chime

Freezer compressor relay stuck closed. Power

to compressor at all times.

ICBBI-42UFDID

Troubleshooting

service.subzero.com

7041397 REVA 12/2017

155

Summary of content (12 pages)

PAGE 1
ICBBI-42UFDID Troubleshooting service.subzero.com Code BUILT-IN FAULT CODE TROUBLESHOOTING GUIDE Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State Ambient thermistor unstable. 10 7 02 Verify temperature reading. Replace control board if temperature is not correct. Refrigerator cabinet thermistor open. 10 1 00 On Freezer evaporator thermistor open. Verify temperature reading and ohm thermistor.
PAGE 2
ICBBI-42UFDID Troubleshooting service.subzero.com Built-In Fault Code Troubleshooting Guide (continued) Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State 15 4 00 15 4 01 On Flash Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State Verify freezer compressor relay stuck closed. Replace control board. Verify main lights relay is stuck open. Replace control board. Defrost relay is stuck open. No power to defrost heater.
PAGE 3
ICBBI-42UFDID Troubleshooting service.subzero.com Built-In Fault Code Troubleshooting Guide (continued) Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State Code Verify wiring and defrost heater. Check defrost heater ohms. Replace defrost heater if necessary. Ice accessories open circuit. 30 8 00 Check wiring for fill tube heater and mullion chute heater. 35 A 37 Check air filter fan is connected and no shorts are evident.
PAGE 4
ICBBI-42UFDID Troubleshooting service.subzero.com Built-In Fault Code Troubleshooting Guide (continued) Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State Check wiring and power to heater. Freezer variable speed compressor communication error. 60 2 02 Four-watt glass well heater not detected. 44 9 43 Main refrigerator lights open circuit.
PAGE 5
ICBBI-42UFDID Troubleshooting service.subzero.com Built-In Fault Code Troubleshooting Guide (continued) Code FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State 90 3 56 Code Verify condenser fan operation. Replace control board if fault is active. 90 A 56 Condenser fan triac shorted. 90 b 80 This code is inactive. Please ignore. No stepper microcommunication. Replace control board. Verify condenser fan operation. Replace control board if fault is active.
PAGE 6
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN FAULT CODE TROUBLESHOOTING GUIDE (continued) Code GENERAL TROUBLESHOOTING Problem Display Test/Action Warm or ▪ No power to the unit. erratic Check plug and temperatures circuit breaker. without ▪ Display shows "0" illuminated and "FF." Tap . or flashing. ▪ Unit in Showroom FAULT CODE TROUBLESHOOTING GUIDE Service Description and Action Icon State 95 2 01 Freezer compressor microprocessor pin stuck in on position. Replace control board.
PAGE 7
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN GENERAL TROUBLESHOOTING (continued) GENERAL TROUBLESHOOTING Display Test/Action Problem "L0 C" shown on display. See Built-In Fault Code Troubleshooting Guide. "H2 L0" shown on display. "d0 0r" shown on display. 6 Measure the resistance of the thermistor through the control board connector. 7 If thermistor is outside the normal range of 30,000 to 33,000 ohms, replace it. See Built-In Fault Code Troubleshooting Guide.
PAGE 8
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN FREEZER CABINET THERMISTOR (continued) FREEZER CABINET THERMISTOR Thermistor Condition Action ▪ ▪ Open or shorted High temperature offset reached ▪ ▪ FREEZER EVAPORATOR THERMISTOR Thermistor Condition Action ▪ EE on display. Service wrench icon flashes. Fault code logged. Compressor on 20 minutes and off 20 minutes. ▪ Open or shorted ▪ ▪ Freezer evaporator temperature above 2°C after defrost Evaporator fan does not start.
PAGE 9
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN CONDENSER FAN TESTING (continued) 4 To measure the resistance of the isolation valve solenoid: Check for no voltage from the return lead on the condenser fan connector to ground. 1 Turn off the power to the unit. 2 Disconnect the electrical leads from the isolation valve solenoid. Evaporator Fan Test - Direct Current ▪ The evaporator fan has 12 VDC power at all times. Evaporator temperature determines the fan speed.
PAGE 10
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN DISPENSER WATER VALVE TEST PROCEDURE (continued) On dispenser models, activating the dispenser confirms that the dispenser water valve is opening. DEFROST HEATER TEST PROCEDURES Measurement Procedure To measure the resistance of the dispenser water valve solenoid: Defrost heater resistance 1 Turn off the power to the unit. 2 Disconnect the defrost heater wire harness from the unit wire harness.
PAGE 11
ICBBI-42UFDID Troubleshooting service.subzero.com BUILT-IN DEFROST HEATER TEST PROCEDURE (continued) SEALED SYSTEM DEFROST HEATER TEST PROCEDURES Measurement Procedure connections from the defrost terminator to the defrost heater. Control board voltage Sealed System Troubleshooting 5 If the voltage is not good, measure the voltage from the control board. 1 Activate the defrost system in manual component activation mode.
PAGE 12
ICBBI-42UFDID Troubleshooting service.subzero.com LOW SIDE LEAK (continued) 6 Recharge the system with virgin R600a refrigerant. Contaminated Sealed System 1 Always evacuate R600a refrigerant to the outdoors. 2 Use nitrogen for back-flushing the system. 3 Repair any leaks at the solder joint, or replace the defective component. 4 Replace the compressor. 5 Replace the high-side filter drier. 6 Replace the evaporator or heat exchanger assembly if the cap tube clogs.