819091D
70
PROBLEM Possible Causes
What To Do
Total Compartment
Warm
PC duct blocked Defrost evaporator chassis
Check for door seal
Evaporator ice up Check defrost element, check continuity
Check door seal / door left open
No refrigeration Does cabinet run? If no check power supplies. If yes
check refrigeration system
If running, check for live frost/fully flooded evaporator. If
not check for leak
Fans not working
Check I/O Fault Log
Is there a 12Volt supply, PC lights working
If yes check fan connection(s) at fan end, also at power
module end of the harness
If no check for power / control module failure.
Power /control module
failure
Is the display lighting up?
If not check display module connection
If OK is compressor running?
If not replace power module
FC Too Cold
Total compartment
too cold
FC sensor location Check set temperature
Sensor clipped and located in correct position
Faulty sensor Check calibration of sensor ice point using interface
binary or refer to thermistor resistance table in service
manual
PC fan not going. Check I/O Fault Log
Check for mechanical obstruction
Check power to plug
Check polarity
Replace fan
Check for broken wires.
FC Too Warm
Bottom warm top
frozen
Iced up evaporator Check defrost element is working, replace if faulty.
Check doors are sealing or have they been left open,
adjust and advise customer.
FC fan jammed, clear restriction, replace fan if necessary.
Check defrost sensor position, reposition onto chassis if
not already there.
Total compartment
warm
PC fan not going Check I/O Fault Log
Check for mechanical obstruction
Check power to plug
Check polarity
Replace fan
Check for broken wires.
No refrigeration Is compressor running? If no check power supplies. If
yes check refrigeration system. If running check for live
frost / fully flooded evaporator, if not check for leak.
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