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COMMISSIONING
166
Starting Operation
Check before Starting Operation
-
Check to see whether there is any refrigerant leakage, and check whether the power or
transmission cable is connected properly.
-
Confirm that 500 V megger shows 2.0 MΩ or more between power supply terminal block and
ground. Do not operate in the case of 2.0 MΩ or less.
NOTE
Never carry out mega ohm check over terminal control board.
Otherwise the control board may break.
Immediately after mounting the unit or after leaving it turned off for an extended length of time,
the resistance of the insulation between the power supply terminal board and the ground may
decrease to approx. 2.0 MΩ as a result of refrigerant accumulation in the internal compressor.
If the insulation resistance is less than 2.0 MΩ, turn on the main power supply.
-
When the power is applied for the first time, operate the product after preheating for
6 hours. To protect the unit by increasing the oil temperature of the compressor.
Starting Operation flow chart
START
Operate the unit in heating mode.
Does Test operation start?
Yes
Is hot water discharged for more
than 3 minutes ?
Yes
Is there any temperature
difference between intake and
discharged water?
Yes
Normal
No
Check whether the power cable and
communication cable are completely connected
- Check the load (Outlet-Inlet temperature
No
and flow rate)
- Check water pressure
- Check if Heating circuit is full open
(closed valves) and there is no air that
blocks the flow.
No
- Check for abnormal sound in outdoor unit
(comp.,Fan, others)
- Refer to Troubleshooting Guide
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