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8.10 Trial operation
8.10.1. Before trial running
Make sure the following works have been nished 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 nished
Note:
Recommend that the unit has been electried for 12 hours for compressor protection. When the unit starts up
again, the indoor unit will start up 5 minutes later after compressor starts up.
8.10.2. Trial running
After checking the above works are nished, 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 blowing 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.
8.10.3. Check after trial running
Perform the following inspections after the trial running is nished:
1. Record the eld setting
2. Record the installation data: pipe length, height difference, charge amount, etc..
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