SUB-ZERO Refrigerator Error Codes

SUB-ZERO 400 series Error Codes

 

05 Upper Cabinet Thermistor read open / short for 10+ seconds, or repeatedly erratic temp’s.

06 Upper Evap. Thermistor read open / short for 10+ seconds, or repeatedly erratic temp’s.

07 Lower Cabinet Thermistor read open / short for 10+ seconds, or repeatedly erratic temp’s.

08 Lower Evap. Thermistor read open / short for 10+ seconds, or repeatedly erratic temp’s.

10 Upper Cabinet Warm Temperature alarm

11 Upper Cabinet Cold Temperature alarm

12 Lower Cabinet Warm Temperature alarm

13 Lower Cabinet Cold Temperature alarm

15 Sealed System Fault (evap temp. cannot drop 5° in 5 minutes, 3 consecutive valve activations)

 

30 SERVICE (Illuminated) 2 hour thermistor temperature average (at left) with index number. Number 1 is most recent 2 hour period. - Press WARMER key in multiple keystrokes to toggle up through indexes, from 1 to 168.

50 Excessive Refrigerator compressor run

60 4 hour compartment temperature average (at left) with index number. Number 64 is oldest recorded 4 hour period. - Press COLDER key in multiple keystrokes to toggle down

through indexes, from 64 to 1.

66 BELL ON Illuminated indicates power failure / interruption.

68 SERVICE illuminated indicates unit was switched off with UNIT ON / OFF key

SUB-ZERO 600 series Error Codes

 

05 Refrig. Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s

06 Refrig. Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s

07 Freezer Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s

08 Freezer Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s

20 Defrost Underheat with No Voltage Feedback Through Gray / White Wire at Defrost Start

21 Defrost Overheat

22 No Voltage Feedback Through Gray / White Wire at Defrost Start

23 Defrost Overheat with No Voltage Feedback through Gray / White Wire at Defrost Start

 

24 Defrost Underheat

30 Excess IM Water Valve Solenoid Activation (> 15 Seconds)

40 Excessive Freezer Comp Run

50 Excessive Refrigerator Comp Run

SUB-ZERO 700 series Error Codes

 

05 Ref. cabinet therm. read open, short or erratic temp for 10+ sec’s

06 Ref. evap. therm. read open, short or erratic temp for 10+ sec’s

07 Fre. cabinet therm. read open, short or erratic temp for 10+ sec’s

08 Fre. evap. therm. read open, short or erratic temp for 10+ sec’s

20 Defrost underheat & no feedback thru Gr/Wh wire at defrst start

21 Defrost overheat

22 No feedback thru Gr/Wh wire at defrost start

23 Defrost overheat & no feedback thru Gr/Wh wire at defrost start

24 Defrost underheat

80 High VS compressor differential pressures or low voltage supplied to VS compressor

81 High Amperage Draw at VS compressor

82 VS comp. couldn’t maintain min. speed at highest current draw

83 Locked VS compressor Rotor

84 Short circuit at VS compressor controller output circuit

85 VS compressor inverter overheated & shut down VS compressor

86 Serial communication failure between VS compressor controller and electronic control board

87 Speed information from electronic control board is out of spec.

88 Electronic control board not receiving status data in response to speed commands

SUB-ZERO 648 PRO & ICB648 PRO Error Codes 

 

EC ZONE SERVICE INSTRUCTION

01 X Zone “X” Cabinet Thermistor Failure (Device or Wiring)

02 X Zone “X” Evaporator Thermistor Failure (Device or Wiring)

03 X Zone “X” Condenser Thermistor Failure (Device or Wiring)

04 0 Ambient Thermistor Failure (Device or Wiring)

20 X Check Zone “X” Defrost Bi-metal for Proper Operation

21 X Check Zone “X” Defrost Bi-metal for Proper Operation

22 X Check Zone “X” Defrost Wiring

23 X Check Zone “X” Defrost Wiring

24 X Check Zone “X” Defrost Heater Ohms

30 0 Check for Stuck Icemaker or Water Valve Failure

35 X Check Zone “X” Fan, Fan Speed Error

40 X Zone “X” Excessive Run

41 X Check Zone “X” Compressor and Wiring

42 0 Check Condenser Fan and/or Wiring

43 X Check Left Refrigerant Valve and Wiring

44 X Check Zone “X” Glass Door Heater and Wiring

45 X Errors Detectable with Red Door Switches-Disabled Now. Check Overhead Lighting

46 0 Check Ice Accessory Wiring for Open Circuit

47 3 Check Accent Lighting Wiring for Short Circuit

80 X Check Power to Compressor Controller for Zone “X”, Troubleshoot with Manual Activation Mode

83 X Replace Zone “X” VS Compressor and Filter-Drier

84 X Check Zone “X” VS Compressor Wiring

85 X Zone “X” VS Compressor Control Overheat

86 X Check Communication Wiring, Replace Zone “X” VS Controller

87 X Check for Broken Wiring or Open Defrost Heater

89 X Check Icemaker Solenoid Valve and Wiring

 

90 X Change Main Control Board

92 0 Check Keypad Wiring

93 0 Replace Keypad

94 1 Check Wiring / Replace User Display #1

94 3 Check Wiring / Replace User Display #2

96 0 Datalogger Malfunction

97 0 Check Communications Cables / Connectors

98 0 Brownout Check Input Power Supply