3-77
Check code
Operation cause
[9A]
Miswiring/Misconnection of indoor
1. Miswiring/Mispiping of indoor/outdoor units
2. Insufficient refrigerant
3. Blockage in pipe run
YES
YES
YES
YES
NO
NO
NO
NO
Indoor
Outdoor
18 to 32˚C
15 to 43˚C
Cooling miswiring
18 to 32˚C
–10 to 15˚C
Heating miswiring
Did you stop the outdoor unit
for 20 minutes or more before
checking miswiring?
Did you check
miswiring according to the temp.
conditions (Table 1)?
Is there other check codes?
Is “9A” displayed again?
Check miswiring according
to conditions in Table 1.
Wiring is correct.
Stop the outdoor unit for
20 minutes or more, and
then check miswiring again.
Check the check code.
Remove the cause, and
check miswiring again.
*Table 1
Insufficient refrigerant,
miswiring, blockage
Check code
Operation cause
[9F]
Indoor PMV blockage
1. Indoor unit PMV connection error/main unit error
2. TC1 sensor/TC2 sensor/TA sensor error
3. Miswiring/Mispiping between indoor and outdoor
4. Blockage in pipe
YES
YES
YES
NO
NO
NO
(Check with miswiring check function of the outdoor unit.)
Are the following sensors normal?
In cooling : TC1, TC2, TA, Pressure
In heating : TC1, TC2, TA
Is wiring correct?
Repair indoor PMV.
Replace defective sensor.
Set normal wiring.
Blockage or pipe breakage
Is indoor PMV normal?
1. Connector connection
2. Wiring 3. Coil
4. Valve
5. Indoor P.C. board
