Fisher & Paykel 790 Active Smart Service Manual page 44

FC TOO WARM
Total Compartment Warm
TOTAL CABINET TOO WARM
FC COOLING - PC WARMING
ALARM ON
FAULT DISPLAYED, NO ALARM
LIGHT NOT FUNCTIONING
CONSOLE NO L.E.D. LIGHTS
* Iced up evaporator
* No refrigeration
* No refrigeration
* Iced up evaporator
* Iced up return duct
* Defrost heater
* Sensors (alarm will sound
and fault code will be
displayed)
* Door switch fault
* Display flashing fault code,
but no alarm sounding
* Blown bulb
* Cabinet type
* Poor connection
* Power/control module no
power
* Power/control module not
initialized
- Check defrost element is working (alarm will sound and
fault code will be displayed if faulty), 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.
- Does cabinet run? If no check power supplies. If yes
check refrigeration system.
/ fully flooded evaporator, if not check for leak.
- 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.
- Check reed switches are working OK by entering the
Input/Output mode (refer to Section 6.2.4) and placing a
magnet over the reed switch
- Check defrost circuit continuity
- Doors sealing, adjust
- PC fan is running, if not refer PC too warm
- De-ice duct area
- Check PC duct insulation for good seal in return duct
- Check doors are sealing
- Check display for any fault code
- Check defrost element continuity
- Put cabinet into manual defrost, wait for defrost relay to
"click" on (2 ½ minutes after pressing buttons)
- If no "click", check power/control module
- If "click" heard, check the defrost heater 110v output at the
power/control module
- Check console for fault codes 0-5
- Sensors above or below limit, refer thermistor service
table in service manual
- Check that no fault code is shown on the display
- Check that PC/FC doors activate reed switches
- Check also reed switches with magnet
- Check wiring harness to power/control module
- Alarm has been switched off by user
- Piezo alarm faulty, replace power/control module
- Check power supply to socket 7Volts, if nil check plug at
display module
- Check continuity of bulb, if nil replace
- Power / console module not initialised, close FC door and
press compartment select button
- Spread halogen bulb legs
- Check lamp holder, replace where possible
- Check connector on display module
- Check harness and plugs on 5 way display module
harness at both ends
- Initiate cabinet
- Initialize power/control module, close FC door and push
any button on display module
- If raspberry noise still made, check door switches
44
If running check for live frost