Daikin FTKM18PVMK, Service Manual

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SiMT041509E Check
Service Diagnosis 86
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 off the power.
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.
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.)
Step 3
Activate power transistor test operation from the indoor unit.
(1) Turn the power on.
(2) Select FAN operation with the
Mode button on the remote controller.
(3) Press the center of the Temp button and the Mode button at the same time.
(4) Select
T
with the Temp or Temp button.
(5) Press the Mode button to start the power transistor test operation.
(R18322)
(1) Remove the terminals from
the compressor.
(2) Connect the terminals to the
terminals of the inverter
analyzer.
Compressor
Inverter analyzer
Be careful not to let the terminals (U, V,
W) touch each other. Otherwise, high
voltage is applied.