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8. TEST RUN
8-1. Preparing for Test Run
● Before attempting to start the air conditioner, check
the following.
(1) All loose matter is removed from the cabinet especially
steel filings, bits of wire, and clips.
(2) The control wiring is correctly connected and all
electrical connections are tight.
(3) The protective spacers for the compressor used for
transportation have been removed. If not, remove them
now.
(4) The transportation pads for the indoor fan have been
removed. If not, remove them now.
(5) 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.
(Fig. 8-1)
(6) Both the gas and liquid tube service valves are open. If
not, open them now. (Fig. 8-2)
(7) Request that the customer be present for the trial run.
Explain the contents of the instruction manual, then have
the customer actually operate the system.
(8) Be sure to give the instruction manual and warranty
certificate to the customer.
(9) 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 EEP ROM is not changed, and is
connected to the new control PCB.
Fig. 8-1
Fig. 8-2
Power mains switch
(Power must be turned ON
at least 5 hours before
attempting test run)
ON
Balance tube
Liquid tube
Gas tube
07-007 W-2WAY_II_NA 1/23/07 6:09 PM Page 70