Viking FDSB5481 - Diagnostics; VCC3 Inverter Diagnostic Codes

Diagnostics
46 ©2012 Viking Preferred Service
Code Compressor
Status
Possible Fault Service Action
1 Flash
(every 15
seconds)
ON 1. No failure
detected
• If system is not working properly, check other refrigeration
components.
OFF 1. No signal
from control
board
2. Open
Thermistor
• If refrigerator settings (thermistor conditions) are at levels
in which the compressor should be “ON”.
• Unplug inverter from power supply and wait for 2
minutes, reconnect the inverter to the power supply
and wait for 12 minutes.
• If inverter still shows 1 flash code and compressor is
OFF, then check the control board.
2 Flashes
(every 5 sec-
onds)
OFF 1. No signal
from the con-
trol board
• Check frequency cable connection
• If frequency cable connection is good , replace
inverter.
3 Flashes
(every 5 sec-
onds)
OFF 1. Compressor
/ inverter cable
open circuit
2. Compressor
winding open
circuit
• Check compressor/inverter cable connection
• Check compressor winding resistances (among the 3
terminal hermetic pins)
• If resistances are within specications and
compressor/inverter cable is OK, replace inverter.
4 Flashes
(every 5 sec-
onds)
OFF 1. Compressor
damaged /
system
damaged
• Check compressor input power
• Check compressor winding resistances
• Check leakage current between hermetic terminal
pins and compressor shell.
• If resistance or leakage current is out of spec, replace
the compressor.
• If resistance and leakage current are within spec,
check inverter/compressor cable for open circuit.
• Unplug inverter from power supply and wait for 2
minutes, reconnect the inverter to the power supply
and wait for 12 minutes.
• If inverter still shows 4 flash code and compressor is
OFF, replace the compressor.
No Flash OFF 1. No input
power
2. Inverter
damaged
• Check the input power (115V)
• If there is no signal, check input power connections
• If voltage is within specs, unplug inverter from power
supply and wait for 2 minutes, reconnect the inverter to
the power supply and wait for 12 minutes.
• If inverter still shows no flash code and compressor is
OFF, change the inverter.
• If the inverter shows no flash code and the compressor is
ON, diagnostic function is not working properly.
VCC3 Inverter Diagnostic Codes
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power source to unit, unless test
procedures require power to be connected. Discharge capacitor through a resistor before attempting to service.
Ensure all ground wires are connected before certifying unit as repaired and/or operational.
WARNING!