General Troubleshooting - Takagi GS-20W-AU5 Installation Manual And Owners Manual

16. GENERAL TROUBLESHOOTING

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)
WATER TEMPERATURE and AMOUNT OF HOT WATER
• The time it takes to deliver hot water from the water heat-
er 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.
• Is the filter on cold water inlet clean? (p. 21)
• 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
2.3 l/min through the water heater? (p. 18)
• Is the unit frozen? (p. 20)
• 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