Troubleshooting - LG THERMA V HN0913T 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
• Expansion tank is
drain hose.
damaged.
• Thermal protector of water
tank heater is activated.
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 gauge and charge more water until
pressure gauge is indication 2~2.5 Bar
• Check if strainer gathers too much particles. If so, strainer
should be cleaned.
• Check if pressure gauge indicates above 4 Bar
• Check if water pipe is getting closed due to stacked
particles 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 gauge 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 gauge indicates above 0.3 Bar.
• Check if the expansion tank and pressure gauge operates
well.
• Flood out water by opening the switch of the safety valve
until pressure gauge is indicating 2~2.5 Bar.
• 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.
• Select DHW Heating Operation and identify if icon is
displayed on the remote controller.
Solution