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7. TEST RUN
7-1. Preparing for Test Run
● Before attempting to start the air conditioner, check the
following.
(1) The control wiring is correctly connected and all electrical
connections are tight.
(2) The transportation pads for the indoor fan have been
removed. If not, remove them now.
(3) The power has been connected to the unit for at least
5 hours before starting the compressor. The bottom of
the compressor should be warm to the touch and the
crankcase heater around the feet of the compressor should
be hot to the touch.
Power mains switch
ON
(Power must be turned
ON at least 5 hours
before attempting test
run)
(4) If only 1 outdoor unit is installed, close the service valve on
the balance tubes, and open the service valve on the other
3 tubes (suction, discharge, and liquid tubes).
If 2 or 3 outdoor units are installed, open the service valves
on all 4 tubes (suction, discharge, liquid, and balance
tubes).
ex.) 8 HP
Liquid tube
Discharge tube
(5) Do not perform the heating test run out of range
temperatures using in heating mode.
(6) Request that the customer be present for the trial run.
Explain the contents of the operating instructions, then
have the customer actually operate the system.
(7) Be sure to give the operating instructions and installation
instructions to the customer.
(8) When replacing the control PCB, be sure to make all the
same settings on the new PCB as were in use before
replacement.
The existing EEPROM is not changed, and is connected to
the new control PCB.
49
Balance tube
Suction tube
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