Gas Leak Detection - Toshiba Super MMU-AP0091H Service Manual

Check code name
[P15] / [AE]
(d07 / AI-NET)
Are service valves at gas and
liquid side 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
TS1 sensor resistance normal?
YES
Does not discharge
refrigerant gas bypass to suction side
through 4-way valve?
NO
Is there no leakage of
SV41 and 42 valve circuits?
YES
Refrigerant shortage,
clogging, pipe breakage.
Check code name

Gas leak detection

TS condition (Sub-code: 01)
NO
NO
* Connectors CN300, 301 White
NO
* Refer to outdoor temp sensor
characteristics-2
YES
NO
(Check there is no clogging and pipe breakage, and then recharge refrigerant.)
195
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 TS1 sensor.
Check and replace 4-way valve and coil.
Repair SV41 and SV42 circuits.
( Coil, valve body,
disconnection of cable, etc
)