Service Reference; B" Models; Pc Too Cold - Fisher & Paykel 790 Active Smart Service Manual

9

SERVICE REFERENCE

9.1

"B" Models

PC TOO COLD

Cold Crispers
Ice In Crispers
Bottom of Compartment Cold –
Top Warm
Total Compartment Too Cold
PC TOO WARM
Top of Compartment Warm –
Bottom Cold
Total Compartment Warm
FC TOO COLD
Total Compartment Too Cold
* Ambient heater open circuit
(alarm will sound and fault
code will be displayed)
* PC fan fitted upside down
* PC fan not going
* Air leakage base duct cover
* PC sensor location
* PC fan not going (alarm will
sound and fault code will be
displayed)
* FC fan not going (alarm will
sound and fault code will be
displayed)
* Short of gas
* PC sensor inaccurate
* PC fan not going (alarm will
sound and fault code will be
displayed)
* PC fan upside down
* Return duct iced up
* PC duct blocked
* Evaporator iced up
* No refrigeration
* Fans not working (alarm will
sound and fault code will be
displayed)
* Power/control module
failure
* FC sensor location
* Faulty sensor
* PC faulty fan (alarm will
sound and fault code will be
displayed)
- Check continuity of element using multimeter.
- Fan hub to be facing PC
- Check voltage to plug, check wiring polarity
- Seal with foam tape on duct divider spigot
- Ensure tip of sensor not against duct
- Check for mechanical obstruction
- Check power to plug
- Check polarity
Check for broken wires
-
- Replace fan
- Check power to plug
- Check for broken wires
- Check polarity
- Replace fan
- Check run percentage, if high check evaporator
- Check fully flooded evaporator, check for leak
- Check calibration of sensor ice point using interface binary
or refer to thermistor resistance table in service manual
- Check power to plug
- Check polarity
- Check for broken wires
- Check fan is not jammed with ice or anything else
- Replace fan
- Fan hub to be facing FC – refit
- De-ice duct area behind chassis
- Check PC duct insulation for good seal in return duct
- Check doors are sealing
- Defrost evaporator chassis
- Check for door seal
- Check defrost element, check continuity
- Check door seal / door left open
- 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
- 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.
- Are lamp / interface L.E.D.'s working?
- If not check display module connection
- If OK is compressor running
- If not replace power module
- Check set temperature
Sensor clipped and located in correct position
- Check calibration of sensor ice point using interface binary
or refer to thermistor resistance table in service manual
- Check PC cooling, fan running
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