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