Check List Before Starting Operation - LG Therma V AHUW056A3 Engineering Product Data Book

THERMA V
Split Type
9. Installation

9.6.2 Check List before Starting Operation

Turn off the power before changing wiring or handling unit.
No. Problem
Heating or cooling is
1
not satisfactory.
Although electric
powersupply is OK
(remote controller
2
displays information),
the unit does not start
working.
3 Water pump noise.
Water is flood out
4
throughdrain hose.
5 DHW is not hot.
Reason
• Setting target
temperature is not
proper.
• Charged water is
notenough.
• Water flow rate is low.
• Water inlet temperature
is too high.
• Water inlet temperature
is too low.
• Air purging is not
completely finished.
• Water pressure is low.
• Too much water
ischarged.
• Expansion tank is
damaged.
• Thermal protector
ofwater tank heater is
activated.
• DHW heating is disabled. • Push
Solution
• Set target temperature correctly.
• Check if temperature is water-based or air-based.
See Function code 03 and 05 in Chapter 6.
• Check pressure gage and charge more water
until pressure gage is indicating 200~250 kPa.
• Check if strainer gathers too much particles. If so,
strainer should be cleaned.
• Check if internal water pump speed is NOT set as
'High'. It should be set as 'High.'
• Check if pressure gage indicates above 30 kPa.
• Check if water pipe is getting closed due to
stacked particles or lime.
• If water inlet temperature is above 55 °C, the unit
does not operated for the sake of system
protection.
• If water inlet temperature is below 5 °C, the unit
does not operated for the sake of system
protection. Wait while unit warms up the water
inlet temperature.
• Open the cap of air purge and charge more water
until pressure gage is indicating 200~250 kPa.
• 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.
• Check if pressure gage indicates above 30 kPa.
• Check if the expansion tank and pressure gage
operates well.
• Flood out the water by opening the switch of the
safety valve until pressure gage is indicating
200~250 kPa.
• Replace the expansion tank.
• Open the side panel of the DHW tank and push
the reset button of the thermal protector. (for more
detail information, please refer to installation
manual of DHW tank.)
button and identify if
displayed on the remote controller.
Hydro Box Unit
icon is
23