Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 140

Check code Check code name
[P15] / [AE] Gas leak detection
(TCC-L / AI-NET) TD condition (Sub-code: 02)
NO
Are service valves on gas
and the liquid sides fully opened?
YES
Is outdoor PMV normal?
1. Connector connection
NO
2. Cabling
3. Coil
* Connectors CN300, 301 White
4. Valve body
5. Outdoor I/F P.C. board
YES
NO
Are characteristics of
TD sensor resistance normal?
* Refer to outdoor unit temperature
sensor characteristics-4.
YES
NO
Is SV4 valve circuit normal?
(Coil misinstallation, valve leakage)
YES
NO
Are there indoor units connected
in different refrigerant circuit?
YES
Refrigerant shortage,
(Check there is no clogging and pipe breakage and then recharge refrigerant.)
clogging, pipe breakage.
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 the service valves fully.
Repair outdoor PMV.
Replace TD sensor.
Repair SV4 circuit.
Coil, valve body, coil installation,
( )
disconnection of cable, etc.
Correct cabling.
Check code Check code name
[P19] / [08] 4-way valve operation error
(TCC-L / AI-NET)
NO
Is 4-way valve coil
connector connected?
YES
NO
Are TS1, TE1, Pd, Ps sensor
connectors connected?
YES
NO
Are characteristics of resistance value
of TS1 and TE1 sensors normal?
YES
NO
Are output voltage characteristics
of Pd and Ps sensors normal?
YES
NO
Are connection and installation
of TE1 and TL sensors correct?
YES
Reset the power supply and
start heating test operation.
YES Does refrigerant gas
Does 4-way valve operate? discharge to suction side
through 4-way valve? * 1
NO
4-way valve error Check 4-way valve.
* 1 Check TS and TE temperature of the outdoor unit which compressors is operated.
(I/F) SW01=[1], SW02=[6], SW03=[2] ® TS sensor temperature
SW01=[1], SW02=[7], SW03=[2] ® TE sensor temperature
Judgment criteria
TE sensor: Normal if TE ≤ 20˚C except summer season (Outside temp 20˚C or lower)
TS sensor: Normal if TS ≤ 40˚C except summer season (Outside temp 20˚C or lower)
Cause of operation
1. 4-way valve error
2. TS1 sensor/TE1 sensor error
3. Pd sensor/Ps sensor error
4. TE sensor/TL sensor misconnection
Correct connector connection.
(4-way valve coil: CN317)
Correct connector connection.
TS1 sensor: CN504
TE1 sensor: CN505
Pd sensor: CN501
Ps sensor: CN500
Replace sensor.
Replace sensor.
Correct connection
and installation.
NO If an error did not occur
in test operation,
restart the operation.
YES