Troubleshooting; General - Takagi T-KJr2-IN / 110 Installation Manual And Owner's Manual

TROUBLESHOOTING

General

PROBLEM
It takes a long time to
get hot water at the
fixtures .
The water is not hot
enough .
The water is too hot .
The hot water is not
available when a fixture
is opened .
The hot water turns
cold and stays cold .
Fluctuation in hot water
temperature .
Unit does not ignite
when water goes
through the unit .
The fan motor is still
spinning after operation
has stopped .
• 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
consider a hot water recirculation system . (pg . 21)
• Compare the flow and temperature . See the charts on pg . 41 .
• Check cross plumbing between cold water lines and hot water lines .
• Is the gas supply valve fully open? (pg . 22)
• Is the gas line sized properly? (pg . 15)
• Is the gas supply pressure enough? (pg . 15)
• Is the set temperature set too low? (pg . 25)
• Is Easy-Link set up correctly in a Multi-Unit System? (pg 18 to 20)
• If a mixing valve is used in your system, is it blending?
• Is the set temperature set too high? (pg . 25)
• 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 . 22)
• Is the water supply valve fully open? (pg . 22)
• Is the filter on cold water inlet clean? (pg . 27)
• Is the hot water fixture sufficiently open to draw at least 1 .9 L/min (0 .5 GPM (US))
through the water heater? (pg . 25)
• Is the unit frozen?
• Is there enough gas in the tank/cylinder? (For Propane models)
• Is it plumbed back with reverse plumbing?
• If your water heater is used in a dual purpose installation with a check valve,is the
check valve defective? Check for cross plumbing .
• If your installation is Multi-Unit, is Easy-Link set up correctly?(pg,18 to 20)
• Is the flow rate enough to keep the water heater running? (pg . 25)
• If there is a recirculation system installed, does the recirculation line have enough
check valves? (pg . 21)
• Is the gas supply valve fully open? (pg . 22)
• Is the filter on cold water inlet clean? (pg . 27)
• Are the fixtures clean of debris and obstructions?
• Check if the flow rate is too low . (pg . 25)
• Is the filter on cold water inlet clean? (pg . 27)
• Is the gas line sized properly? (pg . 15)
• Is the supply gas pressure sufficient? (pg . 15)
• Check for cross connection between cold water lines and hot water lines .
• Is Easy-Link set up correctly?(pg . 18 to 20)
• Is the power on to the water heater?
• Is the gas on?
• Is the flow rate over 1 .9 L/min (0 .5 GPM (US))? (pg . 25)
• Check for the filter on cold water inlet . (pg . 27)
• Check for reverse connection and cross connection .
• If a remote controller is connected, is it powered on?
• Check if the inlet temperature is too high .
• 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 .
SOLUTIONS
29