Troubleshooting; Troubleshooting For Problem While Operation - LG THERMA V Installation Manual

1,MFL68681810,영영 2017. 7. 1. 영영 12:55 Page 83

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
Heating or cooling is not
1
satisfactory.
Although electric power
supply is OK (remote
2 controller displays
information), the unit does
not start working.
Water pump noise.
3
Water is flood out through
4
drain hose.
DHW is not hot.
5
Check Points, Maintenance and Troubleshooting
Reason
• Set target temperature correctly.
• Setting target temperature
• Check if temperature is water-based or air-based. See 'Remote
is not proper.
sensor active' and 'Temp. sensor selection' in Chapter 6.
• Charged water is not
• Check pressure gage and charge more water until pressure gage
enough. is indicating 200~250 kPa.
• Check if strainer gathers too much particles. If so, strainer should
be cleaned.
• Water flow rate is low. • Check if pressure gage indicates above 4 Bar.
• Check if water pipe is getting closed due to stacked particles or
lime.
• Water inlet temperature is
• If water inlet temperature is above 55 °C, the unit does not
too high.
operated for the sake of system protection.
• If water inlet temperature is below 5 °C, the unit does not operated
• Water inlet temperature is
for the sake of system protection. Wait while unit warms up the
too low.
water inlet temperature.
• Open the cap of air purge and charge more water until pressure
gage is indicating 200~250 kPa.
• Air purging is not
• If water does not splash out when the tip (at the top of the hole) is
completely finished.
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.
• Water pressure is low.
• Check if the expansion tank and pressure gage operates well.
• Too much water is
• Flood out the water by opening the switch of the safety valve until
charged.
pressure gage is indicating 200~250 kPa.
• Expansion tank is
• Replace the expansion tank.
damaged.
• Thermal protector of
• Open the side panel of the DHW tank and push the reset button of
water tank heater is
the thermal protector. (for more detail information, please refer to
activated.
installation manual of DHW tank.)
• Select DHW Heating Operation and identify if icon is displayed on
• DHW heating is
the remote controller.
disabled.
Solution
Installation Manual 83