
Check SiBE04-624_B
138 Service Diagnosis
3.7 Inverter Units Refrigerant System Check
Check No.14
3.8 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.
Refrigerant system check
Check for refrigerant leakage.
See the service diagnosis on
refrigerant shortage (U0).
(R18138)
YES
NO
Reconnect the thermistor.
Replace the refrigerant.
Is the
discharge pipe
thermistor disconnected
from the holder?
(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.
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