Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual page 139

Check code Check code name
[P13] / [47] Outdoor liquid back detection error
(TCC-L / AI-NET)
NO
Are connections of outdoor
PMV connectors correct?
YES
NO
Are operations of outdoor
PMV normal?
YES
NO
Are characteristics of Pd sensor/Ps sensor
output voltage normal?
YES
NO
Is SV2 valve coil correctly connected?
YES
YES
Is there any miswiring or
misinstallation on TS sensor?
NO
Check I/F P.C. board.
Cause of operation
1. PMV error
2. Pd sensor, Ps sensor error
3. Clogging of SV2 circuit
4. Leakage on main discharge pipe
5. Outdoor I/F P.C. board error
Correct connector connection.
(CN300)
PMV error
Pd sensor/Ps sensor error
Correct connector connection.
(CV2: CN302)
Correct miswiring/installation
Check code Check code name
[P15] / [AE] Gas leak detection
(TCC-L / AI-NET) TS condition (Auxiliary code: 01)
NO
Are packed valves at gas and
liquid side fully opened?
YES
Is outdoor PMV normal?
1. Connector connection
NO
2. Wiring
3. Coil
* Connectors CN300, 301 White
4. Valve body
5. Outdoor I/F P.C. board
YES
NO
Are characteristics of
TS2 sensor resistance normal?
* Refer to outdoor unit temperature
sensor characteristics-3.
YES
Does not discharge
YES
refrigerant gas bypass to suction side
through 4-way valve?
NO
NO
Is there no leakage of
SV4 valve 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. TS1 sensor error
4. Refrigerant shortage, clogging refrigerant
circuit
5. 4-way valve error
6. SV4 circuit error
Open service valves fully.
Repair outdoor PMV.
Replace TS sensor.
Check and replace 4-way valve and coil.
Repair SV4 circuit.
( Coil, valve body, )
disconnection of cable, etc