Toshiba HFC R407C - Page 38

38
Troubleshooting
Diagnostic procedure for check code
Is 4-way valve coil connector
connected?
Are connectors of TS, TE, Pd
sensors connected?
Is there a problem on wiring of
fixed-speed compressor?
4-way valve error
Modify connector connection
(4-way valve coil: CN 317)
Restart the operation if a trouble has not
occurred in trial operation.
j
j
j
h
No
Ye s
Ye s
Ye s
Are the output voltage
characteristics of Pd sensor
normal?
Sensor error
j
h
No
Ye s
Are resistance value
characteristics of TS and TE
sensors normal?
Sensor error
j
h
No
Ye s
Check code Operation cause
[08] 1. 4-way valve operation error.
4-way valve reversal alarm 2. TS sensor/TE sensor error.
3. Pd sensor error.
4. Fixed-speed compressor Mg-SW operation error.
Modify connection of connectors.
TS sensor: PJ3
TE sensor: PJ4
Pd sensor: PJ7
h
No
j
No
Is fixed-speed compressor
activated?
Restart the operation after manual reset
h
No
Does 4-way valve operate?
j
h
Ye s
No
Does refrigerant bypass
from discharge to suction
on 4-way valve?
Does OL of Mg-SW
operate?
h
h
Check 4-way valve
h
No
No
Ye s
Ye s
Is 4-way valve cool normal?
4-way valve cool error
j
h
No
Ye s
Correct wiring
h
Ye s
Reset power supply and perform
trial heating operation.
j
Mg-SW error
h
Does IOL of fixed-speed
compressor operate?
j
No
Restart the operation after compressor
IOL reset (automatic reset)
h
Ye s