Toshiba MMK-AP0073HP1-E1 Service Manual page 134

A
Is SV4 circuit normal?
YES
Refrigerant overcharge,
clogging,pipe breakage,
abnormal overload condition
Is there a cause to
interfere operation of
YES
indoor heat exchanger?
1 Air filter clogging
2 Heat exchanger clogging
3 Air short circuit
Eliminate the
interfered causes.
NO
Is SV5 circuit normal?
Repair faulty position.
Connector connection,
cabling, coil installation,
clogging, etc
NO
Are not indoor units of different
refrigerant circuit connected?
Check and
correct the cabling.
Refrigerant overcharge,
clogging, pipe breakage,
abnormal overload condition
Repair SV4 circuit.
NO
(
Coil error, clogging,
disconnection of wiring, etc.
Is connector
NO
Is indoor
connection,
PMV normal?
coil normal?
YES
YES
NO
YES
Is there clogging
YES
(Check with miscabling check function of outdoor unit.)
)
YES
Does heating indoor fan
NO
Repair
faulty parts.
Are connector connection,
heat exchanger, fan, and
Are characteristics of TC2
and TCJ sensor resistance
YES
Check indoor P.C. board.
of valve?
NO
134
FILE NO. SVM-16046
C
Heating operation
normally operate?
NO
NO
fan motor normal?
YES
faulty parts.
NO
value normal?
YES
Replace TC2
or TCJ sensor.
Failure → Replace
Replace PMV body.
Repair