ESIE16-03B | Part 3. Repair 3.3. Unit specific repair proceduresPage 88 22/08/16 | Version 1.1SA R32 Sky-Air RZAG-L3.3.2.15. Replacing low pressure switchRemoval1. 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 switchInstallation1. Wrap a wet rag around the low pressure switch.2. Proceed in reverse order.C AUTIONThe maximum applied Nitrogen pressure must not exceed 0.02 MPa.1. Low pressure switch pipe 3. R2T sensor holder (R2T removed))2. Low pressure switchC AUTIONOverheating the low pressure switch will damage or destroy it.213
