Troubleshooting - LG Therma V AHUW096A3 Installation Manual

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Troubleshooting

If operates not properly or it does not start operation, please check following list.
CAUTION
!
Turn off the power before proceeding troubleshooting
Troubleshooting for Problem while Operation
No Problem
• Setting target temperature
is not proper.
Heating or
• Charged water is not
1 Cooling is not
enough.
satisfactory.
• Water flow rate is low.
• Water inlet temperature is
too high.
Although
electric power
supply is OK
(remote
controller
2
displays
• Water inlet temperature is
information), the
too low.
unit does not
start working.
• Air purging is not
completely finished.
Water pump
3
noise.
• Water pressure is low.
• Too much water is
Water is flood
charged.
4 out through
• Expantion tank is
drain hose.
damaged.
• Thermal protector of water
tank heater is actived.
5 DHW is not hot.
• DHW Heating is disabled.
Reason
• Set target temperature correctly.
• Check if temperature is water-based or air-based. See
"Remote sensor active' and 'Temp. sensor selection' in
Chapter6.
• Check pressure gage and charge more water until pressure
gage is indication 2~2.5 Bar
• Check if strainer gathers too much partices. If so, strainer
should be cleaned.
• Check if pressure gage indicates above 4 Bar
• Check if water pipe is getting closed due to stacked paticles
or lime.
• If water inlet temperature is above 57 °C, the unit does not
operated for the sake of system protection
• If water inlet temperature is below 5 °C in cooling operation,
the unit does not operated for the sake of system protection.
Wait while unit warms up the water inlet temperature.
• If water inlet temperature is below 15 °C in heating operation,
the unit does not operated for the sake of system protection.
Wait while unit warms up to 18 °C the water inlet
temperature.
• If you are not using the back up heater accessory
(HA**1M E1), increase the water temperature with the
external heat source (heater, boiler).
If the problem persists, contact your dealer.
• If you want to use the screed drying function, be sure to
purchase and install back up hater accessories (HA**1M E1).
• Open the cap of air purge and charge more water until
pressure gage is indicating 2~2.5 Bar
• 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 0.3 Bar.
• Check if the expanstion tank and pressure gage operates well.
• Flood out water by opening the switch of the safety valve
until pressure gage is indicating 2~2.5 Bar.
• Replace the expantion 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 intallation manual of DHW tank.
• Select DHW Heating Operation and identify if icon is displayed
on the remote conrtoller.
Solution