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9 SERVICE REFERENCE
9.1 “B” Models
PC TOO COLD
Cold Crispers * Ambient heater open circuit
(alarm will sound and fault
code will be displayed)
- Check continuity of element using multimeter.
Ice In Crispers * PC fan fitted upside down - Fan hub to be facing PC
* PC fan not going - Check voltage to plug, check wiring polarity
* Air leakage base duct cover - Seal with foam tape on duct divider spigot
* PC sensor location - Ensure tip of sensor not against duct
Bottom of Compartment Cold –
Top Warm
* PC fan not going (alarm will
sound and fault code will be
displayed)
- Check for mechanical obstruction
- Check power to plug
- Check polarity
- Check for broken wires
- Replace fan
Total Compartment Too Cold * FC fan not going (alarm will
sound and fault code will be
displayed)
- Check power to plug
- Check for broken wires
- Check polarity
- Replace fan
* Short of gas - Check run percentage, if high check evaporator
- Check fully flooded evaporator, check for leak
* PC sensor inaccurate - Check calibration of sensor ice point using interface binary
or refer to thermistor resistance table in service manual
PC TOO WARM
Top of Compartment Warm –
Bottom Cold
* PC fan not going (alarm will
sound and fault code will be
displayed)
- Check power to plug
- Check polarity
- Check for broken wires
- Check fan is not jammed with ice or anything else
- Replace fan
* PC fan upside down - Fan hub to be facing FC – refit
* Return duct iced up - De-ice duct area behind chassis
- Check PC duct insulation for good seal in return duct
- Check doors are sealing
Total Compartment Warm * PC duct blocked - Defrost evaporator chassis
- Check for door seal
* Evaporator iced up - Check defrost element, check continuity
- Check door seal / door left open
* No refrigeration - Does cabinet run? If not 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 (alarm will
sound and fault code will be
displayed)
- Is there a 12Volt supply, PC light 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
- Are lamp / interface L.E.D.’s working?
- 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 faulty fan (alarm will
sound and fault code will be
displayed)
- Check PC cooling, fan running
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