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Trouble Shooting
15
Water pipe overheated
Code
No.
Description Cause Normal Condition
• Abnormal operation of
electric heater
• Leaving water temperature
is above 72°C
• If there is no problem in electric heater
control, possible maximum leaving
water temperature is 62°C.
Start
END
(it is normal
condition)
A
A
B
B
NO
YES
YES
YES
YES
NO
NO
Leaving
water temperature is
higher than target
water temperature
Thermostat
is installed
Leaving
water temperature is
higher than 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.
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