Check Points, Maintenance and Troubleshooting
9. 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 product
• 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
product.
• Install ELB (earth leakage breaker) with 30mA.
• ELB inside the control box of the indoor unit should be turned on
before starting operation.
• 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 the control box of the
indoor unit) should be tightened.
• After water charging, the pressure gage (in front of the indoor unit)
should indicate 2.0~2.5 bar. Do not exceed 3.0 bar.
• 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.
• Two shut-off valves (located at the end of water inlet pipe and water
outlet pipe of the indoor unit) should be open.
• 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.
• As the indoor unit is hung on the wall, vibration or noise can be
heard if the indoor unit is not fixed tightly.
• If the indoor unit is not fixed tightly, it can fall down during operation.
• There should be no apparently damaged parts inside the indoor 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 indoor 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
Shut-off valve
By-pass valve
Hang to the wall
Parts inspection
Refrigerant leakage
Drainage treatment
Water
Product Installation
2
3
4
5
6
7
8
9
10
11
12
13
88
Air-to-Water Heat Pump
Summary of Contents for AHNW096A0
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