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Problem
TOTAL CABINET TOO
WARM
FC COOLING PC
WARMING
ALARM ON
FAULT DISPLAYED, NO
ALARM
LIGHT NOT
FUNCTIONING
Possible Causes
* No refrigeration.
* Iced up evaporator.
* Iced up return duct.
* Defrost heater.
* Sensors.
* Door switch fault.
* Display flashing fault
code, but no alarm
sounding.
* Blown LED PCB.
* Reed Switch.
* Poor connection.
-
Does compressor 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.
-
Check defrost circuit continuity.
-
Check doors are sealing.
-
PC fan 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 (refer to
Sections 10.1.8 or 10.2.6), wait for defrost
relay to "click" on (refer to Section 4.3).
-
If no "click", check power/control module.
-
If "click" heard, check the defrost heater 230v
output at the power/control module.
-
Check display for fault codes 0 - 5.
-
Sensors above or below limit? Refer
thermistor resistance table (Section 4.22).
-
Check that no fault code is shown on the
display.
-
Check that PC/FC doors activate reed
switches by using Input/Output test (refer to
Sections 10.1.6 or 10.2.4).
-
Check operation of reed switches with
magnet.
-
Check
wiring
module.
-
Alarm has been switched off by user.
-
Piezo alarm faulty. Replace power/control
module.
-
Check power supply to socket 7 volts. If nil,
check plug at power/control module.
-
Check reed switch is working by using a
magnet.
-
Check reed switch operation using
Input/Output test (refer to Sections 10.1.6 or
10.2.4).
-
Lamp holder, replace where possible.
-
Connector on power/control module.
125
What To Do
harness
to
power/control
321144
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