Fisher & Paykel 790 Active Smart, Service Manual

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46
9.2 “T” Models
PC TOO COLD * FC fan not going (alarm will
sound and fault code will be
displayed) - Check power to plug
- 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 * Evaporator iced 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 (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/control 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/control module
* PC delivery duct blocked
-
De-ice area behind chassis
-
FC 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 fanr - Check PC cooling, fan running
FC TOO WARM * 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
TOTAL CABINET TOO WARM * 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
- Compressor is not running, check power/control module
voltage outputs
- Check compressor and ancillaries
FC COOLING - PC WARMING * Iced up evaporator - Check defrost circuit continuity
- Doors sealing, adjust
- Is PC fan is running? (alarm will sound and fault code will
be displayed if faulty). If not, refer PC too warm