Maintenance; Test Run - LG THERMA V AHBW036H0 Installation Manual

Maintenance

To assure best performance of
maintenance. It is recommended to proceed following check list for once a year.
CAUTION
Turn off the power before proceeding maintenance
No Category
1
2
Water
3
4
Electricity

Test Run

Check before Test run
Check to see whether there is any refrigerant leakage, and check whether the power or
1
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.
2
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.
Item
Water pressure
Strainer(Field supply)
Safety valve(Field supply)
Terminal block wiring
Check Points, Maintenance and Troubleshooting
, it is required to perform periodical check and
Check Point
• In normal state, the pressure gage (inside of the unit) should
indicate 200~250 kPa.
• If the pressure is less than 30 kPa, please recharge the water.
• Disassemble strainer. Then wash the strainer to make it clean.
• While disassembling the strainer, be careful for water flood out.
• Open the switch of the safety valve and check if water is flood
out through the drain hose.
• After checking, close the safety valve.
• Look and inspect if there is loosen or defected connection on
the terminal block.
Installation Manual 61