Toshiba Super MMU-AP0091H Service Manual page 200

C
Heating operation
Does heating indoor fan
normally operate?
YES
Is indoor PMV normal?
YES
Is check valve of main
discharge pipe normal?
YES
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
NO
Is SV5 circuit normal?
YES
Are not indoor units of different
refrigerant circuit connected?
YES
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
NO
NO
Is connector connection
coil normal?
YES
Repair faulty parts.
Is there a clogging?
YES
Replace PMV body
.
NO
YES
NO
NO
(
Check with miscabling check function
of outdoor unit.
Is connector
connection of indoor
heat exchanger fan or
fan motor normal?
YES
Are characteristics
NO
of sensor TC2 and TCJ
resistance normal?
YES
NO
Check indoor P.C. board.
Faulty Replace
)
200
NO
Repair faulty parts.
NO
Replace TC2 or TCJ sensor.
Repair check valve. Replace
Eliminate the interfered causes.
Repair SV5 circuit.
Coil error, choke,
(
disconnection of cable, etc.
Check and correct cabling.
)