Table of Contents
[8-14 Solenoid Valve Block and Check Valve Replacement Instructions ]
3. Procedures
* Precautions for starting replacement
• Check that the main power supply is OFF.
• Check that no refrigerant is in the outdoor unit.
Remove each part according to the 1)-3) procedures on the figure above right before replacing service parts.
Mount the removed parts back in place in a reversed procedure of 1)-3) on the figure next page after replacing
service parts.
(1) Solenoid valve block ASSY (SV4a, SV4b, SV4d) replacement procedures
•
To remove Solenoid valve block ASSY
Remove the Solenoid valve block coil cover, Solenoid valve coil, and peripheral cables.
1
Remove the screw (M5) that fixes the supporting plate for Solenoid valve block and the unit base.
2
Debraze A-H parts (total 8 places).
3
Do not damage heat exchanger fins and peripheral piping devices when removing the Solenoid valve block ASSY.
4
Remove the screw (M5) that fixes the Solenoid valve block and the supporting plate for Solenoid valve block.
5
•
To install Solenoid valve block ASSY
Fix the Solenoid valve block ASSY and the supporting plate with the fixing screw (M5).
6
Mount the Solenoid valve block ASSY replacement to the unit with care not to damage heat exchanger fins and
7
peripheral piping devices. Fix the supporting plate for Solenoid valve block and the unit base with the fixing screw (M5).
Braze A-H parts (total 8 places).
8
Mount the Solenoid valve block coil cover, Solenoid valve coil, and peripheral cables back in place.
9
* Precautions for replacing Solenoid valve block ASSY
• Be sure to perform no-oxidation brazing when brazing.
• Place a wet towel on the Solenoid valve block when heating pipes to keep the temperature of the valve
from exceeding 120ºC.
• After brazing, check the condition around the brazing. After confirming no leakage, evacuate the air inside.
• Perform brazing with care of the flame direction so that it does not burn cables and plates etc. in the unit.
• Remove the brazing part protecting heat exchanger from burning, and replace the service parts.
HWE1314A
- 359 -
GB
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