Panasonic CS-KS18NKU Service Manual download pdf (Page 50)

9-3. Checking the Indoor and Outdoor Units

(1) Checking the indoor unit

(2) Checking the outdoor unit

Using the TEST/T-RUN terminals

ControlNo. Check items (unit operation)

T-RUN : Test run (compressor and fan motor turn ON).

TEST/MV : Compresses time to 1/60th (accelerates

operation by 60 times faster than normal).

Use the remote controller to operate the

unit in "TEST run" mode. To determine

whether the mode is currently in

"TEST run" mode, check the 4 indicator

lamps on the unit. If all 4 are blinking,

the current mode is "TEST run."

If there are no problems with the above, then check the outdoor unit.

The rated voltage must be present between inter-unit wirings 1 and 2.

Connect a 5 k ohm resistor between inter-unit wirings 2 and 3. When the

voltage at both ends is measured, approximately 12 to 15V DC must

be output and the multimeter pointer must bounce once every 8

seconds.

Or instead of measuring the voltage, you can insert an LED jig and

check that the LED flickers once every 8 seconds.

•

ControlNo. Check items (unit operation)

Apply the rated voltage between outdoor

unit terminals L and N.

If there are no problems with the above, then check the indoor unit.

1 The control panel LED (red) must illuminate.

Short-circuit the outdoor unit COM terminal

to the T-RUN terminal.

2 The compressor and fan motor must all turn on.

•

TEST/T-RUN terminals

(TEST)/MV T-RUN COM

For the "Test run" procedure, refer to the Appendix B "Installation Instructions".

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Panasonic CS-KS18NKU Service Manual Page 50