Inverter Checker" Check - Daikin Quaternity FTXG09HVJU Service Manual

SiUS04-921
3.7

"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.)
3) Turn the power on and operate the air conditioner.
 How to activate the inverter test mode
1) Turn the power on.
2) Hold the "CLOCK" button for 5 seconds.
3) Display "
4) "T" will be displayed.
5) Press the "CLEAN" button to start inverter test.
Service Diagnosis
(1)
Remove the FASTON
terminals from the terminal
block of the compressor.
Compressor
(The matrix display will appear on the remote controller.)
" on the matrix display of the remote controller and press the "CLOCK"
button.
(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.
Check
(R5160)
145