ESIE16-03B | Part 3. Repair 3.3. Unit specific repair procedures22/08/16 | Version 1.1 Page 89SA R32 Sky-Air RZAG-L3.3.2.16. Replacing main PCBRemoval1. 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. Flip over the protection sheet (1).5. Remove the power and remote control wiring from the terminal block (2).6. Cut the 5 tie wraps (3).7. Unplug all connectors (4) from the main PCB (5).8. Remove the 4-way valve coil (6) from the 4-way valve (refer to "Replacing 4-way valve coil" on page 75).9. Remove the wiring from the cable clamp (9).10. Remove the 3 screws (8) that fix the heat sink with a ring spanner or a wrench/socket.11. Remove the 4 screws (7) that fix the main PCB support to the Daikin unit.12. Lift and turn the lid (10) to the left.13. Lift the main PCB (5) to release it from the unit.14. Slightly tilt (max. 15°) the main PCB (5) and disconnect 2 connectors at the rear of the main PCB panel.15. Guide the wiring (11) through the slots.WARNING : R ISK OF FIREWhen reconnecting a connector to the PCB, do not apply force, as this may damage the connector or connector pins ofthe PCB.C AUTIONDue to the large size of the PCB it is sensitive to bending.Only use a wrench/socket or a ring spanner to loosen or fasten the heat sink screws.Do not use a screwdriver.C AUTIONDo not remove the main PCB assembly yet, it is still attached by wiring.C AUTIONTilting the main PCB stresses the heat pipe, doe not tilt more than 15°.
