30
Troubleshooting
Initial Operation
Temperature
Troubleshooting
The Water Heater does not attempt to ignite
when water is running.
• Check for reversed plumbing or crossed pipes.
• Check the water filter. (See page 29)
The Water Heater attempts to ignite but fails.
• Reset the Water Heater and try again. There may
be air in the gas line.
• Have a professional check the gas supply
pressure.
Hot water is not available when a fixture is
opened.
• 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?)
• Is the water filter clogged? (See page 29)
• Is the
Power
button turned ON?
No water is available when a fixture is opened.
• Is the water supply cut off?
• Is the Water Heater frozen?
The hot water is not the correct temperature.
• Is the hot water fixture/faucet sufficiently open?
Water takes time to become hot when turning
the hot water fixture/faucet.
• Have you allowed enough time for the cold water
in the pipes to drain out?
The water is too hot.
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate?
(See page 13)
• If the water supply temperature is high, it is
possible for the temperature to be higher than
the temperature set on the Remote Controller.
• 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 Remote
Controller.
The water is not hot enough.
• Are the gas and water supply valves fully open?
• Is the water temperature setting appropriate?
(See page 13)
• 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 Remote
Controller. Decrease the amount of hot water
passing through the Water Heater and the
temperature should stabilize.
The water is cold when only a single fixture is
open.
• The unit will not heat the water if the flow rate is
less than 0.29 GPM (1.1 L/min)*.
Open the fixture more or open other fixtures so
that a greater flow passes through the unit, and
the unit should begin heating again.
*Minimum activation flow rate: 0.5 GPM (2.0 L/min)
Minimum operating flow rate: 0.29 GPM (1.1 L/min)
Remote Controller
The Power indicator does not light up.
• Has there been a power failure?
• Is the power connected properly?
The water temperature changes after a power
failure or when the power is disconnected.
• The temperature setting and the flow meter
alarm setting may both need to be reset after a
power outage.
The clock display shows “- : - -”.
• If the time is not displayed on the clock, either
a power failure has occured or power was
disconnected resulting in the display showing
“- : - -”. (See page 11)
The flow meter alarm does not sound or it sounds
before the tub has been filled to the set amount.
• The flow meter alarm is set to sound when hot
water is continuously discharged for the set
volume of water.
If hot water is used for other fixtures while filling
the tub, the alarm will sound before the tub is
full.
• If mixing valves are used, or if cold water is mixed
with hot water at the fixture, the tub will fill
more than the setting of the flow meter alarm.
The setting cannot be changed when a button is
pressed.
• The Remote Controller is locked. While the
Remote Controller is locked these buttons
the
PROG
button, the
MENU
button, and the /
buttons cannot be used. (See page 16)
[For recirculation systems]
Flame Indicator lights up or goes out.
• During recirculation operation, the Water Heater
will turn on and off to keep the hot water pipes
up to temperature.
