Service manual

Troubleshooting
Diagnostic Procedure for Check Code
81
14
Check code Operation cause
1. Miswiring/Mispiping of indoor/outdoor units
[9A]
2. Insufficient refrigerant
Miswiring/Misconnection of indoor
3. Blockage in pipe run
Was the outdoor unit stopped
for 20 minutes or more before
checking miswiring?
Did you check
miswiring according to the temp.
conditions Table 1?
Is 9A displayed again?
Stop the outdoor unit for
20 minutes or more, and then
check miswiring again.
Insufficient refrigerant,
miswiring or blockage
Check miswiring according
to conditions in Table 1.
Investigate the check code.
Remove the cause, and
check miswiring again.
Wiring is correct.
No
Yes
No
Yes
Yes
No
Are there any other check codes?
No
Yes
Table 1 Cooling miswiring
Indoor 18 to 32°C
Outdoor 15 to 43°C
Check code Operation cause
1. Indoor unit PMV connection error/main unit error
[9F] 2. TC1 sensor/TC2 sensor/TA sensor error
Indoor PMV blockage 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 P.C. board
Are the following sensors
normal? TC1, TC2,
TA, Pressure
Replace defective sensor.
Modify wiring.
Repair indoor PMV.
Blockage or pipe breakage.
(Check with miswiring check function of the outdoor unit.)
No
Yes
No
Yes
Is wiring correct?
No
Yes