Troubleshooting; Iii Troubleshooting - Danfoss ERC 102 Reference Manual

APPENDIX III: TROUBLESHOOTING
Problem
Compressor does not start
Fan does not start
Defrost does not start
Alarm does not sound
Display brightness is weak
Shift between Eco and Normal mode does
not happen on ambient light change
E01, E02 or E03 is shown on display
Display alternates between Con and
temperature
Display alternates between Hi and
temperature
Display alternates between Lo and
temperature
Display shows dEf
52 ERC 102 Reference manual – APPENDIX III: TROUBLE SHOOTING
Probable cause
Waiting for compressor delay timer
Defrost in progress
Line voltage to compressor too low
or too high
Door is open or door contact is defective
Controller in pull-down mode
Alarm delayed
Ambient light sensor broken
Ambient light sensor broken
or light level not set properly
E01: Sensor S1 defective
E02: Sensor S2 defective
E03: Sensor S3 defective
Condenser too hot
Temperature too high
Temperature too low
Defrost in progress
Remedy
Check CoP->CSt
Check CoP ->Pot /Pod
Check dEF ->dit, dot
Check CoP->uLi, uLo, uHi
Fan stops when door is opened
Check that door contact is ok
Defrost might be delayed during pull-down
Check parameter Pud->Pdi
Check ALA->Htd, Abd
Check Pud->Pdd
Replace sensor
Check Eng->SLd, SLn
Replace sensor
Clean condenser
Check Con ->CAL, CbL
Check ALA->HAt
Check ALA -> LAt
Check diS ->SdF