Discharge Temp Td1 Error - Toshiba Super MMU-AP0091H Service Manual

Check code name
[P03] / [1E]
(d07 / AI-NET)
Are service valve 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 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. IIs there no leakage through
SV41 circuit?
YES
Are not indoor units of different
refrigerant circuit connected?
YES
Refrigerant shortage,
clogging, pipe breakage
Check code name

Discharge temp TD1 error

NO
NO
* Connector CN300, 301 White
NO
* Refer to Outdoor unit temperature
sensor characteristics-4.
NO
NO
NO
(Check with miswiring check
function of outdoor unit.)
(Check there is no pipe breakage, and then recharge the refrigerant.)
188
Cause of operation
1. Service valve of outdoor unit closed
2. Outdoor PMV error
3. TD sensor error
4. Refrigerant shortage, clogging of refrigerant
circuit system
5. 4-way valve error
6. SV4 circuit leakage, misinstallation
Open service valve fully.
Repair outdoor PMV.
Replace TD1 sensor.
Check 4-way valve.
Correct installation of valve coil,
or replace SV41 valve.
Correct wiring