Mitsubishi Electric CAHV-P500YB-HPB Service Handbook page 157

[ IX Troubleshooting ]
2. Check valve Replacement instructions
Check valve
1
ø
12.7
1. Debraze A-B parts (total 2 places), and remove the Check valve .
2. Replace the Check valve to be serviced while it is removed from the unit.
Precautions for replacing Check valve
·Be sure to perform no-oxidation brazing when brazing.
·Place a wet towel on the Check valve when heating pipes to keep the temperature of the valve from exceeding
120°C [248°F].
·After brazing , check the condition around the brazing. After confirming no leakage, evacuate the air inside. *1
·Perform carefully with the flame direction so that it does not burn cables and plates etc. in the unit.
*1 Refer to Chapter I [5] Vacuum Drying (Evacuation) for detailed procedure. (page 7)
HWE15070
A
1
ø [
12.7 1/2"]
B
[
1/2"]
1) Remove the lower service panels.
(Panel FB)
A
2
ø [
12.7 1/2"]
Check valve
B
2
ø
12.7
- 150 -
[
1/2"]
GB