Use and Care Manual

32
Troubleshooting-1
Initial Operation
Unit does not attempt to ignite
when water is running.
• Check for reversed plumbing or crossed pipes.
• Check the water drain valve lter. ( p.29, p.30)
Unit attempts to ignite but fails
DHW Temperature
DHW is not available when a
xture is opened.
• Are the gas and water supply valves fully open?
• Is the water supply cut off?
• Is the hot water xture/faucet sufciently 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?)
• Is the water drain valve lter clogged? ( p.29)
• Is the power button turned on?
•
Can the sound of the pump be heard?
If not, there may be a malfunction.
Contact your installer or a qualified service technician.
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate? (
p.14)
• If the water supply temperature is high, it is possible for the temperature
to be higher than the temperature set on the Operation Panel.
• If only a small amount of hot water is demanded, it is possible for the
temperature to be higher than the temperature set on the Operation Panel.
The water is too hot.
• Have you allowed enough time for the cold water in the
pipes to drain out?
Water takes time to become hot when
turning the hot water xture/faucet.
No DHW is available when
a xture is opened.
• Is the water supply cut off?
• Is the unit frozen?
The DHW is not the correct
temperature.
• Is the hot water xture/faucet sufciently open?
• Reset unit and try again. There may be air in the gas line.
• Have a professional check the gas supply pressure.
(Continued)
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate? ( p.14)
• If the amount of hot water required is very high, it is
possible
for the temperature to be lower than the temperature set on
the Operation Panel.
Decrease the amount of hot water passing through the unit
and the temperature should stabilize.
The DHW is not hot enough.