Check Points, Maintenance and Troubleshooting
Installation Manual
77
ENGLISH
7. Check Points, Maintenance and Troubleshooting
If everything is going well until now, it is time to start the operation and to take advantages of .
Before starting operation, pre-check points are described in this chapter. Some comments about
maintenance and how to do troubleshooting are presented.
Check List before Starting Operation
Turn off the power before changing wiring or handling unit.
• All switches having contacts for different poles should be wired
tightly according to regional or national legislation.
• Only qualified person can proceed wiring.
• Wiring and local-supplied electric parts should be complied with
European and regional regulations.
• Wiring should be following the wiring diagram supplied with the unit.
• Install ELB (earth leakage breaker) with 30 mA.
• Earth should be connected. Do not earth to gas or city water pipe,
metallic section of a building, surge absorber, etc.
• Use dedicated power line.
• Connections on the terminal block (inside of the unit) should be
tightened.
• After water charging, the pressure gage (in front of the unit) should
indicate 200~250 kPa. Do not exceed 300 kPa.
• During water charging, air should be taken out through the hole of
the air purge.
• If water does not splash out when the tip (at the top of the hole) is
pressed, then air purging is not completed yet. If well purged, the
water will splash out like fountain.
• Be careful when testing air purge. Splashed water may make your
dress wet.
• By-pass valve should be installed and adjusted to secure enough
water flow rate. If water flow rate is low, flow switch error (CH14)
can be occurred.
• There should be no apparently damaged parts inside the unit.
• Refrigerant leakage degrades the performance. If leakage found,
contact qualified LG air conditioning installation person.
• While cooling operation, condensed dew can drop down to the
bottom of the unit. In this case, prepare drainage treatment (for
example, vessel to contain condensed dew) to avoid water drop.
No Category Item Check Point
1
Electricity
Field wiring
Protective devices
Earth wiring
Power supply
Terminal block wiring
Charged water pressure
Air purge
By-pass valve
Parts inspection
Refrigerant leakage
Drainage treatment
Water
Unit Installation
2
3
4
5
6
7
8
9
10
11
