Mitsubishi Electric PURY-P120Y(T)HMU-A, Service Handbook

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[
IX
Troubleshooting ]
- 326 - HWE0803A GB
3. Solenoid valve (SV1a), Capillary tube ASSY (CP1) replacement instructions
1. Applicable models
PURY-P72THMU-A(-BS), PURY-P72YHMU-A(-BS)
* The parts can be replaced without removing the Solenoid valve ASSY on the unit for the units that do not have
built-in low pressure twinning kit (optional accessory).
2. Parts to be serviced
NO. Item Applicable models
3. Procedures
Removing the Solenoid valve (SV1a) and the Capillary tube ASSY (CP1) individually is difficult when the low
pressure twinning kit (optional accessory) is built in. Refer to the procedures
Ԙԙ
below and replace the parts.
……Low pressure twinning kit (optional accessory) is built in.
* Precautions for starting replacement
• Check that the main power supply is OFF.
• Check that no refrigerant is in the outdoor unit.
Heat exchanger
A
(
φ
9.52 [3/8"])
Compressor cover
Low pressure
twinning kit
(optional accessory)
B
(
φ
6.35 [1/4"])
NO.1
Solenoid valve
(SV1a)
A
NO.2
Capillary tube ASSY (CP1)
B
Solenoid valve ASSY
Ԙ Debraze A and B, and remove solenoid valve ASSY
from the unit.
ԙ
Replace Solenoid valve (SV1a) or Capillary tube ASSY
(CP1), and mount them again.
* Precautions for brazing
• Be sure to perform no-oxidation brazing when brazing.
• After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air
inside. (*1)
• Braze carefully with the flame direction so that it does not burn cables and plates etc. in the unit.
*1: Refer to Chapter I [8] Vacuum Drying (Evacuation) for detailed proced
Solenoid valve (SV1a)
PURY-P72THMU-A(-BS)
PURY-P72YHMU-A(-BS)
Capillary tube ASSY (CP1)
1
2