Toshiba Super MMU-AP0091H Service Manual page 196

Check code name
[P15] / [AE]
(d07 / 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
TD1, TD2 sensor resistance normal?
YES
Is SV4 valve circuit normal?
(Coil misinstallation, valve leakage)
YES
Are not indoor units in different
refrigerant circuit connected?
YES
Refrigerant shortage,
clogging, pipe breakage.
Check code name
Gas leak detection
TD condition (Sub-code: 02)
NO
NO
* Connectors CN300, 301 White
NO
* Refer to outdoor temp sensor
characteristics-4
NO
NO
(
Check with miscabling check
function of outdoor unit.
(Check there is no clogging and pipe breakage, and then recharge refrigerant.)
196
Cause of operation
1. Outdoor unit service valve closed
2. Outdoor PMV error
3. TD sensor error
4. SV4 circuit error
5. Refrigerant shortage, clogging refrigerant
circuit
Open service valves fully.
Repair outdoor PMV.
Replace TD1 or TD2 sensor.
Repair SV41 and SV42 circuits.
Coil, valve body, coil installation,
(
disconnection of cable, etc.
Correct cabling.
)
)