Inverter Unit Refrigerant System Check; Inverter Analyzer Check - Daikin FTXM-V Series Service Manual

Check
5.6

Inverter Unit Refrigerant System Check

Check No.14
5.7

Inverter Analyzer Check

Check No.15
 Characteristics
Inverter analyzer: RSUK0917C
If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an
inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some
other failure (main PCB, power module, etc.). The inverter analyzer makes it possible to judge the
cause of trouble easily and securely. Connect an inverter analyzer as a quasi-compressor instead
of compressor and check the output of the inverter.
 Operation Method
Step 1
Be sure to turn the power off.
Step 2
Install an inverter analyzer instead of a compressor.
Note:
Make sure the charged voltage of the built-in smoothing electrolytic capacitor drops to 10 VDC or
below before carrying out the service work.
138
Refrigerant system check
Is the discharge
pipe thermistor
disconnected from the
holder?
NO
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (U0).
YES
SiUS042113E
Reconnect the thermistor.
Replace the refrigerant.
(R15833)
Part 6 Service Diagnosis