Toshiba R410A Service Manual page 160

C
All heating operation
NO
Does heating indoor fan
normally operate?
YES
NO
Is indoor PMV normal?
YES
Is connector connection
coil normal?
YES
Repair faulty parts.
Is there a clogging?
YES
Replace PMV body
.
NO
Is check valve of main
discharge pipe normal?
YES
Are there
any obstructions to the
YES
operation of the heat exchanger?
1. Air filter clogging
2. Blocked heat exchanger
3. Air short circuit
NO
NO
Is SV5 circuit normal?
YES
Abnormal
Check operation of 4-way valve.
Normal
Abnormal
Check clogging of SV11 circuit.
Normal
NO
Are there indoor units connected
to different refrigerant circuits?
( Use the mis-wiring check function
of outdoor unit.
YES
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
Is connector
NO
connection of indoor
heat exchanger fan or
fan motor normal?
YES
Repair faulty parts.
NO Are characteristics NO
of sensor TC2 and TCJ
resistance normal?
YES
Replace TC2 or TCJ sensor.
NO
®
Check indoor P.C. board.
Faulty Replace
®
Repair check valve. Replace
®
Repair check valve. Replace
Eliminate the interfered causes.
Repair SV5 circuit.
Coil error, choke,
(
disconnection of cable, etc.
Replace 4-way valve.
Replace defective parts.
Check and correct cabling.
)
Check code
[P22] / [1A] Outdoor fan IPDU error
(TCC-L / AI-NET)
Sub-code: 0 : IGBT short circuit
3 : Motor lock error
C : TH sensor error (Heat sink overheat)
E : Vdc error
Are wire connections on the fan IPDU
and the power P.C. board assembly normal?
YES
Is the outdoor fan motor locked?
NO
Is winding resistance of the motor correct?
9
13 to 33 (Between R and S, R and T, S and T)
YES
Is the fan IPDU firmly attached to the heat sink.
YES
Is sub-code of outdoor I/F P.C. board [0d]?
NO
Is there no problem such as stuffing or
blast blowing to discharge port of outdoor fan?
NO
Check fan IPDU.
)
Check code name 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
1 : Position detect circuit error
4 : Motor current error detected
D : TH sensor error
NO
Correct cable connector connection.
YES
NO
Replace motor.
YES
Retightening of screws, etc.
YES
Replace fan IPDU.
YES
Correct cause of overload.