Check
SiBE12-908
166
Service Diagnosis
3.8
“Inverter Checker” Check
Check No.14
1. Characteristics
If abnormal stop occurs due to compressor startup failure or overcurrent output when using
inverter unit, it is difficult to judge it results from the compressor failure or other failure (control
PCB, power transistor, etc.). The inverter analyzer makes it possible to judge the cause of
trouble easily and securely. (Connect this analyzer as a quasi compressor instead of
compressor and check the output of inverter)
2. Operation Method
1) Be sure to turn the power off.
2) Install the 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 connector terminal of compressor is not a faston terminal (difficult to remove the wire on
the terminal), it is possible to connect a wire available on site to the unit from output side of
PCB. (Do not connect it to the compressor at the same time, otherwise it may result in incorrect
detection.)
How to activate inverter test mode
1) Turn the power on.
2) Press the 3 buttons (TEMP
▲
, TEMP
▼
, MODE) on the remote controller simultaneously.
3) Press TEMP
▲
or
▼
button and select
T
.
4) Press the MODE button to enter the trial operation mode.
5) Press the MODE button and select FAN mode.
6) Press the ON/OFF button to start inverter test.
(1) Remove the faston terminals
from the terminal block of
the compressor.
(2) Connect the faston terminals
to the terminals of the Inverter
Analyzer.
Inverter Analyzer
Be careful not to touch the terminals
(U,V,W)each other. Otherwise, high voltage is
applied.
Compressor
(R5160)
