Toshiba MMU-AP0121MH - Manual (Page 87)

87
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 not indoor units of different
refrigerant circuit connected?
Check indoor P.C. board.
Faulty Replace
C
Is there a cause to
interfere operation of
heat exchanger of indoor unit?
1. Air filter clogging
2. Heat exchanger clogging
3. Air short circuit
Coil error, choke,
disconnection of cable, etc.
( )
( ) Check with miscabling 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 name
[P22]
Check code name
Outdoor fan IPDU error
Cause of operation
1. Fan lock
2. Fan IPDU P.C. board error
3. Overload cause
4. External cause such as blast
5. Fan IPDU power P.C. board error
Auxiliary 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 not outdoor fan motor locked?
Is sub-code of outdoor I/F P.C. board [0d]?
Check fan IPDU.
Correct cable connector connection.
Correct cause of overload.
Retightening of screws, etc.
Replace fan IPDU.
Is there no problem
such as stuffing or blast blowing to
discharge port of outdoor fan?
Are wire connector
connection on fan IPDU and
power P.C. board A’ssy normal?
Is there no loosening on fixation
between fan IPDU and heat sink?
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)
YES
NO
YES
NO
NO
NO
NO