Toshiba MMK-AP0073HP1-E1 Service Manual page 140

Check code
[P17] / [bb]
(Current code / AI-NET)
Are service valves of gas and
liquid sides fully opened?
YES
Is outdoor PMV normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. Outdoor I/F P.C. board
YES
Are characteristics of
TD2 sensor resistance normal?
YES
Does not discharge
refrigerant gas bypass to suction side
through 4-way valve?
YES
SV4 circuit
1. Are not SV41 and SV42 valve
coils installed reversely?
2. Is there no leakage through
SV42 circuit?
YES
Is not an indoor unit of different
refrigerant line connected?
YES
Refrigerant shortage,
clogging, pipe breakage.
Check code name
Discharge temp TD2 error
NO
NO
* Connectors CN300, 301 White
NO
* Refer to outdoor unit
temperature sensor
characteristics-4.
NO
NO
NO
( Check with miscabling check
function of outdoor unit.
(Check there is no pipe breakage, and then recharge refrigerant.)
Cause of operation
1. Outdoor unit service valve closed
2. Outdoor PMV error
3. TD sensor error
4. Refrigerant shortage, clogging of refrigerant circuit
5. 4-way valve error
6. SV4 circuit leakage, misinstallation
)
140
FILE NO. SVM-16046
Open service valves fully.
Repair outdoor PMV.
Replace TD2 sensor.
Check 4-way valve.
Correct installation of valve coil.
Replace SV42 valve.
Correct cabling.