Inverter Analyzer Check - Daikin FTKN09NMVJU Service Manual

Check
5.7

Inverter Analyzer Check

Check No.15
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.)
Step 1
Step 2
95
Characteristics
Operation Method
Be sure to turn off the power.
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.
(1) Remove the terminals from
the compressor.
Compressor
Reference:
If the terminals of the compressor are not FASTON terminals (difficult to remove the wire on the
terminals), it is possible to connect wires available on site to the outdoor unit from output side of
PCB. (Do not connect them to the compressor at the same time, otherwise it may result in
incorrect detection.)
(2) Connect the terminals to the
terminals of the inverter
analyzer.
Be careful not to let the terminals (U, V,
W) touch each other. Otherwise, high
voltage is applied.
SiUS041501E
Inverter analyzer
(R18322)
Service Diagnosis