LG AH-W096A0 Service Manual page 67

Code
Description
No.
15 Water pipe overheated
Start
NO
Leaving
water temperature is
higher than target
YES
water temperature
YES
Thermostat
NO
is installed
YES
NO
Leaving
water temperature is
higher than 62 °C
YES
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Cause
• Abnormal operation of
electric heater
• Leaving water temperature
is above 72°C
END
(it is normal
condition)
A
A
B
B
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• If there is no problem in electric heater
control, possible maximum leaving
water temperature is 62°C.
• This is unexpected case.
• Turn off the system and call service center.
• If the system is not turned off before it yields
error code (CH15), very hot leaving water will
be generated and it is harmful to human.
• Room air is not fully heated by under floor
heating.
• Wait while room air is heated by target
temperature of thermostat.
Trouble Shooting
Normal Condition
LGE Internal Use Only