Daikin FTXP20-71L Service Manual page 53

To perform a mechanical check of the compressor
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01E – 2023.01
INFORMATION
If you have a multimeter with data logging functionality, record the current in 1 of
the U‑V‑W wires at compressor start‑up. If mechanical lock is present, logged current
will drastically increase to a peak value and the unit will trigger an error.
INFORMATION
If a mechanical lock is present, also check and eliminate the root cause. Mechanical
lock is most likely caused by lack of lubrication (which might be related to overheat
or wet operation), failing crankcase heater (if available), impurities in the refrigerant,
....
A mechanical lock is present on the
compressor?
Yes
No
Prerequisite: First perform an auditive check of the compressor, see
"3.2.1 Checking procedures" [
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Before proceeding:
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
2 Visually check:
▪ For oil drops around the compressor. Locate and fix as needed.
▪ Pipes for signs of damage. Replace pipes as needed.
3 Check that the compressor bolts are correctly fixed. Fix as needed.
4 Check that the compressor wire terminals cover is correctly installed and
fixed. Correct as needed.
5 Check the compressor dampers for any damage.
Action
Replace the compressor, see
"3.2.2 Repair
Perform an mechanical check of the
compressor, see
procedures" [
4
52].
3 Components
|
4
procedures" [ 58].
"3.2.1 Checking
4
52].
Service manual
53