Fisher & Paykel RB36S25MKIW, Service Manual

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10 FAULT FINDING PROCEDURE
10.1 Fault Display Codes (Both Visual And Audible)
If a fault should develop in the temperature measurement system, a fault code will be shown automatically
on the display and the fault audio alarm will sound when the drawer is opened.
The alarm consists of a number of beeps emitted by the beeper located on the power/control module. The
number of beeps indicate the fault code as listed on the following pages. Also displayed on the user
interface is a binary code with the fault code displayed. This is seen in the temperature increase/decrease
LEDs.
10.1.1
Binary Code
When a fault occurs, the fault (spanner) LED is flashing. The pattern of red LEDs illuminated in the
temperature LEDs forms a binary code. Each LED has a value, and by adding the values of the illuminated
LEDs, a total value is obtained.
Example:
In the illustration above, the LEDs illuminated have a value of 8 + 2 + 1, so the fault code is 11.
10.1.2
Fault Codes
The faults and their respective codes are as shown below.
Display Code: 0
No faults present.
Display Code: 1
Compressor Can’t Start.
Reason:
The compressor has failed to start after 6 attempts.
Action:
Check the compressor windings. If faulty, replace compressor. If compressor O.K.,
replace power/control module.
Display Code: 2
Defrost Timeout.
Reason:
Defrost was aborted after 40 minutes. This has happened in the last two defrosts,
therefore it is probably a defrost heater failure.
Action:
Check to see if the evaporator is iced up. If so, this may be due to the fact that the
drawer was left open. Manually force a defrost and check that the defrost heater is
operating. If faulty, replace.
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