ESIE16-03B
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Part 3. Repair
3.3. Unit specific repair procedures
Page 88
22/08/16
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Version 1.1
SA R32 Sky-Air RZAG-L
3.3.2.15. Replacing low pressure switch
Removal
1. Switch off the Daikin unit via the user interface.
2. Switch off the Daikin unit with the field supplied circuit breaker.
3. Remove plate work when required (refer to
"Basic removal" on page 67
).
4. Recover the refrigerant (refer to
"Refrigerant repair procedures" on page 61
).
5. Connect a nitrogen hose to the outdoor suction service port.
6. Attach a hose with core-depressor to allow the release of the nitrogen.
7. Unplug the low pressure switch connector on the main PCB.
8. Cut the tie wrap that fixes the low pressure switch wiring.
9. Cut the low pressure switch pipe (1).
10. Remove the low pressure switch (2).
11. Supply nitrogen to the piping circuit.
12. Heat the low pressure switch pipe (1) using an oxygen acetylene torch.
13. When the solder is liquid, pull the low pressure switch pipe (1).
14. Cut the nitrogen supply when the piping has cooled down.
Figure 3-23: Removing low pressure switch
Installation
1. Wrap a wet rag around the low pressure switch.
2. Proceed in reverse order.
C
AUTION
The maximum applied Nitrogen pressure must not exceed 0.02 MPa.
1. Low pressure switch pipe
3. R2T sensor holder (R2T removed))
2. Low pressure switch
C
AUTION
Overheating the low pressure switch will damage or destroy it.
2
1
3
