517672
7
2.10
PC Fan
The PC fan is a 230v shaded pole motor. The fan cycles with the compressor and turns off when
the door is opened
.
2.11
Fault Alarm
If the control module detects a fault, which it is unable to recover, an alarm is sounded. The alarm
only comes on when the door is opened. The number of beeps indicate the fault code. If the door
is closed, the alarm discontinues until the door is opened again.
2.12
Compressor Starting
The compressor is started by the control module. It is a timed start, therefore if the compressor
does not start within 1 second, the controller will cancel the start. If the compressor draws too
much current, the overload will activate and cut power to the compressor.
3
FAULT CODES
If a fault should develop in the temperature measuring system, defrost system, temperature control
variable resistor, or should the compressor fail to start, an audio fault alarm will sound when the
door is opened. The alarm consists of a number of beeps emitted by the beeper located in the
control module. The number of beeps emitted indicates the fault as shown in the Fault Code table
below.
3.1
Fault Code Table
Fault 2:
2 beeps
Reason:
Defrost sensor failed to reach 8º C within 30 minutes. This has happened in
the last three defrosts, therefore probably defrost heater failure.
Action:
Check connections at the control module and inline connectors.
Check defrost heater. If faulty, replace.
Fault 3:
3 beeps
Reason:
The resistance of both sensors is outside the normal range (> 45K Ohms)
Primary Action:
Check the 4-way connector at the control module.
Secondary Action: Check sensor resistance.
Re-terminate the 4-way connector.
Tertiary Action:
Replace control module.
Fault 4:
4 beeps
Reason:
The resistance of both sensors is outside the normal range (< 660 Ohms).
Primary Action:
Check the 4-way connector at the control module.
Secondary Action: Check sensor resistance.
Re-terminate the 4-way connector.
Tertiary Action:
Replace control module.
