Code decoder
Kolpak error codes
Pick the maker and the equipment, or type the code. Each page says what the code means on that control, what is safe to check and when to stop.
- Codes
- 2,442
- Makers with codes
- 98
- Updated
- November 2026
AIR TEMP SENSORKolpak Walk-In Cooler Alarm AIR TEMP SENSOR: Return Air ProbeCOIL TEMP SENSORKolpak Walk-In Cooler Alarm COIL TEMP SENSOR: Evaporator ProbeEXCESS DEFROSTKolpak Walk-In Cooler Alarm EXCESS DEFROST: 32 Defrosts in 48 HoursHIGH AIR TEMPKolpak Walk-In Cooler Alarm HIGH AIR TEMP: Room Too WarmHIGH SUPERHEATKolpak Walk-In Cooler Alarm HIGH SUPERHEAT: Above Upper LimitLOW AIR TEMPKolpak Walk-In Cooler Alarm LOW AIR TEMP: Room Too ColdLOW SUPERHEATKolpak Walk-In Cooler Alarm LOW SUPERHEAT: Below Lower LimitPRESSURE SENSORKolpak Walk-In Cooler Alarm PRESSURE SENSOR: Suction Pressure ReadingSUCTION TEMP SENSORKolpak Walk-In Cooler Alarm SUCTION TEMP SENSOR: Open or ShortedAUX1 SENSORKolpak Walk-In Cooler Error Code AUX1 SENSOR: Main AUX1 Shorted or OpenAUX2 SENSORKolpak Walk-In Cooler Error Code AUX2 SENSOR: Main AUX2 Shorted or OpenAUX3 SENSORKolpak Walk-In Cooler Error Code AUX3 SENSOR: Main AUX3 Shorted or OpenCOMMUNICATION ERRORKolpak Walk-In Cooler Error Code COMMUNICATION ERROR: Bonded ControllersCOMP SEQ COMM ERRORKolpak Walk-In Cooler Error Code COMP SEQ COMM ERROR: Sequencer Link LostDEFR TERM ON TIMEKolpak Walk-In Cooler Error Code DEFR TERM ON TIME: Defrost Ended on TimeDISP EXTERNAL ALARM 1Kolpak Walk-In Cooler Error Code DISP EXTERNAL ALARM 1: Display AUX1 ActiveDISP EXTERNAL ALARM 2Kolpak Walk-In Cooler Error Code DISP EXTERNAL ALARM 2: Display AUX2 ActiveDISP EXTERNAL ALARM 3Kolpak Walk-In Cooler Error Code DISP EXTERNAL ALARM 3: Display AUX3 ActiveDISPLAY AUX2 SENSORKolpak Walk-In Cooler Error Code DISPLAY AUX2 SENSOR: Display AUX2 Shorted or OpenDISPLAY AUX3 SENSORKolpak Walk-In Cooler Error Code DISPLAY AUX3 SENSOR: Display AUX3 Shorted or OpenDOOR OPEN ALARMKolpak Walk-In Cooler Error Code DOOR OPEN ALARM: Door Input OpenDOOR TEMP HIGHKolpak Walk-In Cooler Error Code DOOR TEMP HIGH: Door Temperature Above LimitDOOR TEMP LOWKolpak Walk-In Cooler Error Code DOOR TEMP LOW: Door Temperature Below LimitDOOR TEMP SENSOR ALARMKolpak Walk-In Cooler Error Code DOOR TEMP SENSOR ALARM: Temp 1 Open or ShortedDOOR TEMP SENSORKolpak Walk-In Cooler Error Code DOOR TEMP SENSOR: Display AUX1 Shorted or OpenEMAIL FEATUREKolpak Walk-In Cooler Error Code EMAIL FEATURE: Email Alert Not ConfirmedEXTERNAL ALARM 1, 2, OR 3Kolpak Walk-In Cooler Error Code EXTERNAL ALARM 1, 2, OR 3: Input ActiveEXTERNAL ALARM 1Kolpak Walk-In Cooler Error Code EXTERNAL ALARM 1: Main AUX1 Input ActiveEXTERNAL ALARM 2Kolpak Walk-In Cooler Error Code EXTERNAL ALARM 2: Main AUX2 Input ActiveEXTERNAL ALARM 3Kolpak Walk-In Cooler Error Code EXTERNAL ALARM 3: Main AUX3 Input ActiveFLASH MEM ERRORKolpak Walk-In Cooler Error Code FLASH MEM ERROR: Internal Controller AlarmHELP - PANICKolpak Walk-In Cooler Error Code HELP - PANIC: Panic Button PressedHIGH DOOR TEMP ALARMKolpak Walk-In Cooler Error Code HIGH DOOR TEMP ALARM: Door Above OffsetHIGH MONITOR TEMP2 ALARMKolpak Walk-In Cooler Error Code HIGH MONITOR TEMP2 ALARM: Temp 2 Above OffsetHIGH MONITOR TEMP2Kolpak Walk-In Cooler Error Code HIGH MONITOR TEMP2: Monitor2 Above LimitHIGH MONITOR TEMP3 ALARMKolpak Walk-In Cooler Error Code HIGH MONITOR TEMP3 ALARM: Temp 3 Above OffsetHIGH MONITOR TEMP3Kolpak Walk-In Cooler Error Code HIGH MONITOR TEMP3: Monitor3 Above LimitLOW DOOR TEMP ALARMKolpak Walk-In Cooler Error Code LOW DOOR TEMP ALARM: Door Below OffsetLOW MONITOR TEMP2 ALARMKolpak Walk-In Cooler Error Code LOW MONITOR TEMP2 ALARM: Temp 2 Below OffsetLOW MONITOR TEMP2Kolpak Walk-In Cooler Error Code LOW MONITOR TEMP2: Monitor2 Below LimitLOW MONITOR TEMP3 ALARMKolpak Walk-In Cooler Error Code LOW MONITOR TEMP3 ALARM: Temp 3 Below OffsetLOW MONITOR TEMP3Kolpak Walk-In Cooler Error Code LOW MONITOR TEMP3: Monitor3 Below LimitLOW PRESSUREKolpak Walk-In Cooler Error Code LOW PRESSURE: Suction Pressure Too LowMONITOR TEMP2 SENSOR ALARMKolpak Walk-In Cooler Error Code MONITOR TEMP2 SENSOR ALARM: Temp 2 Open or ShortedMONITOR TEMP3 SENSOR ALARMKolpak Walk-In Cooler Error Code MONITOR TEMP3 SENSOR ALARM: Temp 3 Open or ShortedPUMPDOWN TIMEOUTKolpak Walk-In Cooler Error Code PUMPDOWN TIMEOUT: LPCO Pump Down Too LongROOMTEMP2 SENSOR ALARMKolpak Walk-In Cooler Error Code ROOMTEMP2 SENSOR ALARM: Temp 2 Shorted or OpenROOMTEMP3 SENSOR ALARMKolpak Walk-In Cooler Error Code ROOMTEMP3 SENSOR ALARM: Temp 3 Shorted or OpenSHORT COMP CYCLEKolpak Walk-In Cooler Error Code SHORT COMP CYCLE: Compressor Starting Too OftenWATCHDOG ERRORKolpak Walk-In Cooler Error Code WATCHDOG ERROR: Internal Controller AlarmSF alternating with OPKolpak Walk-In Display SF Alternating with OP: Open SensorSF alternating with SHKolpak Walk-In Display SF Alternating with SH: Shorted SensorEEKolpak Walk-In Error Code EE: Program Failure
Book a visit
Code not listed, or no code at all?
A unit that shows nothing often points to power or the control. Call us with the maker and model number and we talk it through.