Airwell YCV280, Installation And Maintenance Instructions Manual

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9. Trial running
9.1 Before trial running
Make sure the following works have been finished according
to the installation manual.
a. Piping work
b. Wiring work
c. Leakage check
d. Evacuate work
e. Additional refrigerant charging
f. Also check if the indoor works have been finished
9.2 Trial running
After checking the above works are finished, operate the unit normally and check the following items:
a. Make sure the indoor and the outdoor are operating normally;
b. Operate indoor unit one by one and make sure the corresponding outdoor unit is also running well;
c. Check if the proper temperature air is blwoing out from indoor unit;
d. Check if the fan speed can be adjusted properly by the controller
Note:
1. Heating and cooling mode can be operated under the correct temperature range.
2. If a knocking noise can be heard from the compressor, stop the unit immediately and then energize
the crankcase heater to get enough long time before restarting the unit.
3. Once stopping, the compressor will not run right now only after the unit has stopped for 3 minutes,
which can protect the compressor.
4. In the quiet running at night mode, the outdoor fan will be at low speed. But this is not a malfunction.
9.3 Check after trial running
Perform the following inspections after the trial running is finished:
1. Record the field setting
2. Record the installation data: pipe length, height difference, charge amount, etc..
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