Daikin EWYQ005AAV3P [134/170] Inverter checker check

Additional Checks for Troubleshooting ESIE06-04

3–64 Part 3 – Troubleshooting

5.15 “Inverter Checker” Check

Check No.16

Characteristics If an abnormal stop occurs due to compressor startup failure or overcurrent output when using the

inverter unit, it is difficult to judge whether it results from the compressor failure or another failure

(control PC Board, 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 a compressor

and check the output of the inverter.)

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 the 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 the output side of the

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.

(1) Remove the faston terminals

from the terminal block of

the compressor.

(2) Connect the faston terminals

to the terminals of the Inverter

Analyzer.

Be careful not to touch the terminals

(U,V,W) with each other. Otherwise,

high voltage is applied.

Compressor

Inverter Analyzer