General Troubleshooting - Takagi GS-2000W-AU Installation Manual

PROBLEM
It takes a long time to get hot
water at the taps.
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 gets cold and stays
cold.
Fluctuation in hot water temperature • Is the filter on cold water inlet clean? (p. 21)

GENERAL TROUBLESHOOTING

TEMPERATURE and AMOUNT OF HOT WATER
• The time it takes to deliver hot water from the water heater to your
taps 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.
• Compare the flow rate and temperature. See the chart on p. 28.
• Check cross plumbing between cold water lines and hot water
lines.
• Is the gas supply valve fully open? (p. 17)
• Is the gas line sized properly? (p. 10)
• Is the gas supply pressure enough? (p. 11)
• Is the set temperature set too low? (p. 18,19)
• Is the set temperature set too high? (p. 18,19)
• Make sure the unit has 240V 50Hz power supply.
• If you are using the remote controller, is the power button turned
on? (p. 18,19)
• Is the gas supply valve fully open? (p. 17)
• Is the water supply valve fully open? (p. 17)
• Is the filter on cold water inlet clean? (p. 21)
• Is the hot water fixture sufficiently open to draw at least 3.0 l/min
through the water heater? (p. 18)
• Is the unit frozen?
• Is there enough gas in the tank? (for propane)
• Is the flow rate enough to keep the water heater running? (p. 18)
• Is the gas supply valve fully open? (p. 17)
• Is the filter on cold water inlet clean? (p. 21)
• Are the fixtures clean of debris and obstructions?
• Is the gas line sized properly? (p. 10)
• Is the supply gas pressure enough? (p. 11)
• Check for cross connection between cold water lines and hot water
lines.
POSSIBLE SOLUTIONS
22