[9A] Indoor Unit Miswiring/Misconnection; [9F] Refrigerant Circulation Amount Shortage Judgement - Toshiba HFCR407C Service Manual

Check code
[9A]
Indoor unit miswiring/misconnection
Was the outdoor unit stopped for
20 minutes or more before
checking miswiring ?
Did you check miswiring
according to the temp.
conditions Table 1 ?
Are there any other
check codes ?
Investigate the check code.
Remove the cause, and check
miswiring again.
Check code
[9F]
Refrigerant circulation amount
shortage judgement
14
Is indoor PMV normal ?
1. Connector connection
2. Wiring
3. Coil
4. Valve
5. Indoor PC board
Are the following sensors
normal? TC1, TC2, TA, Pressure
Is wiring correct ?
Blockage or pipe breakage.
Troubleshooting
Diagnostic procedure for check code
Stop the outdoor unit for 20
No
minutes or more, and then check
Yes
Yes
No
Yes
No
Insufficient refrigerant, miswiring
Yes
No
Yes
No
Yes
No
(Check with miswiring check function of the outdoor unit.)
Yes
Operation cause
1. Miswiring/Mispiping of indoor/outdoor units
2. Insufficient refrigerant
3. Blockage in pipe run
miswiring again.
No
Is 9A displayed again ?
or blockage
Table 1
Indoor
Outdoor
Operation cause
1. Indoor unit PMV connection error/main unit error
2. TC1 sensor/TC2 sensor/TA sensor error
3. Miswiring/Mispiping between indoor and outdoor
units
4. Blockage in pipe
96
Wiring is correct.
Check miswiring according to conditions
in Table 1.
Cooling miswiring
18 to 32 °C
15 to 43 °C
Repair indoor PMV.
Replace defective sensor.
Modify wiring.