LG THERMA V AHNW16606B0, Installation Manual, Page: 63 / 65

Check Points, Maintenance and Troubleshooting
Installation Manual 63
ENGLISH
During test operation in winter, it concentrates mainly on the heating operation.
Before cooling test operation, to consider freezing of the plate heat exchanger, performing
the cooling test operation after raising the water temperature up to 30℃ in the heating
mode.
1
Check to see whether there is any refrigerant leakage, and check whether the power or
transmission cable is connected properly.
2
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.
n
Calculate refrigerant concentration
Refrigerant concentration =
Total amount of replenished refrigerant in refrigerant facility (kg)
Capacity of smallest room where indoor unit is installed (m 3 )
Limiting concentration: 0.44 kg/m 3 (R410A)
Limiting concentration is the limit of Freon gas concentration where immediate measures can be
taken without harming the human body when refrigerant leaks in the air. The limiting concentration
shall be described in the unit of kg/m
3 (Freon gas weight per unit air volume) for facilitating
calculation
Limiting concentration
After professional installation, the authorized contractor has to commission of the device.
The commissioning can only be performed by a person authorized by the manufacturer! If the
commission is performed by an unauthorized person, the warranty period is not applicable.
Management of the device must be performed in accordance with current instructions for use.
Check before Test run
Test Run