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The Combi Boiler stops burning
during operation.
White smoke comes out of the
exhaust vent on a cold day.
The DHW is turbid.
The water appears blue
The bath tub/wash-basin has turned
blue
Frequent water discharge from the
drain pipe.
A small amount of water is discharged
from the pressure relief valve.
The Combi Boiler water is leaking
from the safety relief valve.
is blinking
The screen display shows
.
(The Burner ON Icon is lit without
DHW Icon or Heating Icon.)
Other
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water fixture/faucet sufficiently open?
• Is the gas being cut off by the gas meter?
(Can other gas devices such as stoves be used?)
• (For LP) Is there enough gas in the tank?
(Can other gas devices such as stoves be used?)
• When the heating supply temperature is too high, the unit
will stop burning.
• This is normal. The white smoke is actually steam.
• This is harmless. Small bubbles appear as the air in the
water is heated and depressurized rapidly to
atmospheric pressure.
• Coloration to a blue color may be noticed from small
traces of copper ion contained in the water and fat
(furring). However, there are not problems concerning
health. Coloration of the bath tub/wash-basin can be
prevented by cleaning frequently.
• Condensation forms inside the unit during operation
and is discharged from the drain pipe.
• This is normal. When the Combi Boiler is under high
pressure, a small amount of water may be discharged
from the pressure relief valve.
• There is a possibility that air is leaking from the expansion
tank. Contact your installer or a qualified service technician.
• This is normal. This shows disconnecting the outdoor sensor.
• When DHW Wait Time is operating, the screen display
occasionally shows
(
page 16)
.
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