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All heating operation
Is indoor PMV normal?
Is SV5 circuit normal?
Is there a clogging?
Check and correct cabling.
Repair SV5 circuit.
Replace PMV body
.
Repair faulty parts.
Replace TC2 or TCJ sensor.Repair faulty parts.
Eliminate the interfered causes.
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
Is connector
connection of indoor
heat exchanger fan or
fan motor normal?
Are characteristics
of sensor TC2 and TCJ
resistance normal?
Is connector connection
coil normal?
Does heating indoor fan
normally operate?
Is check valve of main
discharge pipe normal?
Are there indoor units connected
to different refrigerant circuits?
Check indoor P.C. board.
Faulty Replace
C
Are there
any obstructions to the
operation of the heat exchanger?
1. Air filter clogging
2. Blocked heat exchanger
3. Air short circuit
Coil error, choke,
disconnection of cable, etc.
( )
( )
Use the mis-wiring check function
of outdoor unit.
Repair check valve. Replace
Repair check valve. Replace
YES
YES
YES
YES
NO
NO
Check operation of 4-way valve.
Replace 4-way valve.
Normal
Abnormal
Check clogging of SV11 circuit.
Replace defective parts.
Normal
Abnormal
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
YES
NO
NO
NO
Check code
[P22] / [1A]
(TCC-L / AI-NET)
Check code name
Outdoor fan IPDU error
Cause of operation
1. Fan lock
2. Fan IPDU P.C. board error
3. Overload
4. External cause such as power surge
5. Fan IPDU power P.C. board error
Sub-code: 0 ∗ : IGBT short circuit 1∗ : Position detect circuit error
3∗ : Motor lock error 4 ∗ : Motor current error detected
C∗ : TH sensor error (Heat sink overheat) D∗ : TH sensor error
E∗ : Vdc error
Is the outdoor fan motor locked?
Is sub-code of outdoor I/F P.C. board [0d]?
Is the fan IPDU firmly attached to the heat sink.
Check fan IPDU.
Correct cable connector connection.
Correct cause of overload.
Retightening of screws, etc.
Replace fan IPDU.
Replace motor.
YES
YES
YES
YES
YES
Is winding resistance of the motor correct?
13 to 33 (Between R and S, R and T, S and T)
Is there no problem such as stuffing or
blast blowing to discharge port of outdoor fan?
Are wire connections on the fan IPDU
and the power P.C. board assembly normal?
YES
NO
YES
NO
NO
NO
NO