Toshiba HFC R407C - Page 39

39
Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[09] 1. Compressor running but not pumping.
No temperature change in TC temperature 2. Bi-Metal thermostat protection device.
3. Compressor wiring.
4. Faulty TC temperature sensor.
Is the power supply
voltage to the outdoor
unit normal?
Is the compressor
running but not
pumping?
Are the gas suction,
gas discharge and
liquid packed valves
fully open?
Is the wiring of the
compressor normal?
See judgement flow [1d]
compressor fault
j
j
j
j
Ye s
Ye s
Ye s
Ye s
Is the indoor unit in
frost conditions?
Is the indoor TC sensor
normal and connected
correctly?
Confirm:
Lack of gas charge
Pipe blockage
j
j
Ye s
Ye s
Modify power supply
No
No
Open packed valves
No
Modify connection of
wiring
No
h
h
h
h
See judgement flow
[1d] compressor fault
No
Replace TC sensor
No
h
h