Test Operation And Self Diagnosis - Panasonic CS-A24BB4P Service Manual

22 TEST OPERATION AND SELF DIAGNOSIS

22.1. Test operation
• • Always use a properly-insu lated tool to operate the switch
on the circuit board. (Do not use your finger or any metallic
object).
• • Never turn on the power supply until all installation work has
been completed.
• • Turn on the circuit breaker before test operation extends
past 12 hours.
(The crankcase heater will be energized, which will warm
the compressor and prevent liquid compression.)
• • For three-phase models, check that the phase is not
reversed.
(If the phase is reversed, the LED on the printed circuit
board will flash.)
• • Check that the voltage is 198 V or higher when starting the
unit. (The unit will not operate if the voltage is less than
198V.)
• • Carry out test operation for 5 minutes or more, using the
remote control or the switch on the outdoor unit printed
circuit board.
• • Always carry out cooling operation first during test
operation, even during the warm season.
(If heating is carried out first, problems with operation of the
compressor will result.)
22.2. Test operation from the
outdoor unit
During outdoor unit emergency operation or test operation, the
LEDs on the printed circuit board will flash.
To cancel test operation, press the TEST RUN button once
more while test operation is being carried out.
(Test operation will stop automatically after 30 minutes have
passed.)
22.3. Test operation using the wired
remote control
1. Check that "COOL" is displayed on the operation mode
display, and then press the OFF/ON button to start test
operation.
2. Within 1 minute of pressing the OFF/ON button, press the
TEST RUN button.
3. The pipe temperature (gas pipe) will then be displayed in
the temperature setting display of the remote control.
• • During group control, the number appearing in the timer
display will change each time the air conditioner No.
button is pressed, and the pipe temperature for the
indoor unit corresponding to the number displayed will
appear in the temperature setting display.
4. Check that the temperature in the pipe temperature display
starts dropping after operation has been continuing for
some time.
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CASSETTE TYPE