Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook page 331

[ IX Troubleshooting ]
Solenoid valve block 1
6
5
4
3
2
1
Valve
Solenoid valve block 2
Pin-face tool
(7) In case of SV5b (2-way switching valve) (only for P126-P234 models)
This 2-way valve is closed when powered. Check the LED display and the switching sound to check whether the valve
has no faults.When cooling, the switching coincides with 21S4b. When it is difficult to check by the sound, check the tem-
perature at the front and the back of the pipe to check whether the refrigerant is flowing.
∗Do not give an impact from the outside, as the outer hull will be deformed, leading to the malfunction of the inner valve.
Refrigerant Circuit Figure (P168 ~ P234 models)
Solenoid Valves Block 2
Solenoid Valves Block 1
SV4d
SV4b
SV4a
SV4c
TH7
HEXb1
HEXf3
TH6
HEXf2
CV7a
HEXf1
ST15 ST16 ST17
ST14
CV9a
CV5a
CV10a
CV4a
CV8a
CV6a
Orifice
Check Valves Block 1
Pin-face tool
Tightening torque : 150N m
- 322 -
SV5a
CV7b
SV5b
HEXb2 HEXf4
ST18 ST19
CV5b
CV4b CV3b
CV2b
CV6b
Check Valves Block 2
CV3a
CV2a
Cap
Plunger
ST1 BV1
BV2
TH5