John Wood Takagi - 110-310-510 - Manual (Page 28)

28
TROUBLESHOOTING
General
PROBLEM SOLUTIONS
TEMPERA
TURE and
AMOUNT
OF HOT
W
A
TER
It takes long time to
get hot water at the
fixtures. The time it takes to deliver hot water from the water heater to your fixtures depends
on the length of piping between the two. The longer the distance or the bigger the
pipes, the longer it will take to get hot water.
If you would like to receive hot water to your fixtures quicker, you may want to con-
sider a hot water recirculation system. (pg. 23) •
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The water is not hot
enough. Compare the flow and temperature. See the charts on pg. 43.
Check cross plumbing between cold water lines and hot water lines.
Is the gas supply valve fully open? (pg. 27)
Is the gas line sized properly? (pg. 16)
Is the gas supply pressure enough? (pg. 17)
Is the set temperature set too low? (pg. 27) •
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The water is too hot. Is the set temperature set too high? (pg. 27) •
The hot water is not
available when a fix-
ture is opened. Make sure the unit has 120 VAC, 60 Hz power supply.
If you are using the remote controller, is the power button turned on?
Is the gas supply valve fully open? (pg. 24)
Is the water supply valve fully open? (pg. 24)
Is the filter on cold water inlet clean? (pg. 29)
Is the hot water fixture sufficiently open to draw at least 2.8 l/min (0.75 GPM (US))
through the water heater? (pg. 27)
Is the unit frozen?
Is there enough gas in the tank/cylinder? (For Propane models) •
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The hot water turns
cold and stays cold. Is the flow rate enough to keep the water heater running? (pg. 27)
If there is a recirculation system installed, does the recirculation line have enough
check valves? (pg. 23)
Is the gas supply valve fully open? (pg. 24)
Is the filter on cold water inlet clean? (pg. 29)
Are the fixtures clean of debris and obstructions?
Check if the flow rate is too low. (pg. 27) •
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Fluctuation in hot
water temperature. Is the filter on cold water inlet clean? (pg. 29)
Is the gas line sized properly? (pg. 16)
Is the supply gas pressure sufficient? (pg. 17)
Check for cross connection between cold water lines and hot water lines. •
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W
A
TER HEA
TER
Unit does not ignite
when water goes
through the unit. Is the flow rate over 2.8 l/min (0.75 GPM (US))? (pg. 27)
Check for the filter on cold water inlet. (pg. 29)
Check for reverse connection and cross connection.
If you use the remote controller, is the power button turned on?
Check if the inlet temperature is too high. •
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The fan motor is still
spinning after opera-
tion has stopped. This is normal. After operation has stopped, the fan motor keeps running from 15
to 70 seconds in order to re-ignite quickly, as well as purge all the exhaust gas out
of the flue. •
Unit sounds abnormal
while in operation Contact the manufacturer at 1-888-479-8324. •