Checking The Indoor And Outdoor Units - Panasonic CS-KS30NKU Technical & Service Manual

8-3. Checking the Indoor and Outdoor Units

(1) Checking the indoor unit
No. Control
1 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.
For the "Test run" procedure, refer to the Appendix B "Installation Instructions".
(2) Checking the outdoor unit
No. Control
1 Apply the rated voltage between outdoor
unit terminals L and N.
2 Short-circuit the outdoor unit COM terminal
to the T-RUN terminal.
If there are no problems with the above, then check the indoor unit.
Using the TEST/T-RUN terminals
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).
Check items (unit operation)
• 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.
Check items (unit operation)
• The control panel LED (red) must illuminate.
• The compressor, fan motor and 4-way valve must all turn on.
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TEST/T-RUN terminals
(TEST)/MV T-RUN COM