Fisher & Paykel 635 Active Smart - Inverter with Diagnostic Function; Diagnostic Procedures

321144
42
6.5 VCC-3 Inverter With Diagnostic Function
This function has been added to the new generation of VCC inverter in order to help Service Technicians
diagnose faults.
6.5.1 Diagnostic Procedures
Diagnostic codes for VCC-3 inverter.
Through a translucent front cover, the VCC-3 inverter flashes a green LED to indicate a fault due to inverter failure,
compressor failure or lack of signal from the power/control module.
The LED flashes every 0.5 seconds inside a flash cycle, and each flash lasts 125 milliseconds.
Flashing Cycles:
Flash Code 1: 1 cycle every 15 seconds (1 flash every 15 seconds).
Flash Code 2: 2 cycles every 5 seconds (2 flashes every 5 seconds).
Flash Code 3: 3 cycles every 5 seconds (3 flashes every 5 seconds).
Flash Code 4: 4 cycles every 5 seconds (4 flashes every 5 seconds).
VCC-3 Diagnostic Codes
1 Flash - No failure detected.
2 Flashes - No signal from power/control module.
3 Flashes - Inverter failure.
4 Flashes - Compressor failure.
Figure 1 – Label on the VCC-3 inverter box Figure 2 – LED position on
the inverter box
Code Compressor
Status
Probable Root Causes Service Action
ON No Fault Detected.
All OK with the inverter.
¾ Check other refrigerator components in
case the system is not refrigerating.
1 Flash
(every 15
seconds)
OFF No signal from
power/controller module.
- No power to power/control
module?
¾ Unplug VCC from the power supply and
wait 2 minutes.
¾ Reconnect the VCC to the power supply
and wait for 12 minutes.
2 Flashes
(every 5
seconds)
OFF No signal from
power/controller module.
¾ Check frequency cable connection.
¾ Check the power to the power/control
module.
 If the frequency cable connection and
power/control module are OK:
¾ Replace the inverter.
3 Flashes
(every 5
seconds)
OFF Compressor / inverter cable
interrupted (open circuit).
- Inverter damaged?
- Compressor winding open
circuit?
¾ Check inverter/compressor cable is
connected.
¾ Check compressor winding resistance
across all three terminals of the
compressor fusite.
 If the winding resistances are with in
specification and both inverter &
compressor cables are OK:
¾ Replace the inverter.