Daikin Sensira Series - Compressor

2 | Components
Service manual
44
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
Split Sensira R32
ESIE18-12E – 2021.02
Is the problem solved? Action
No Return to the troubleshooting of the
specific error and continue with the
next procedure.
2.2 Compressor
2.2.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform an auditive check of the compressor
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see "2.10Plate work"[4101].
1 Open the compressor insulation.
2 Turn ON the power using the respective circuit breaker.
3 Start the unit operation via the user interface.
4 Wait for - or create condition to operate the compressor.
5 Listen to the compressor when it tries to operate. Judge if a mechanical lock is
present.
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?
Action
Yes Replace the compressor, see
"2.2.2Repair procedures"[449].
No Perform an mechanical check of the
compressor, see "2.2.1Checking
procedures"[444].
To perform a mechanical check of the compressor
Prerequisite: First perform an auditive check of the compressor, see
"2.2.1Checking procedures"[444].
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.