Takagi 540P Indoor User Manual

64 Page
TROUBLESHOOTING
GENERAL
PROBLEM SOLUTIONS
TEMPERATURE and AMOUNT OF HOT WATER
It takes a long time to
get hot water at the
fixtures.
 Check to see if a recirculation timer is active. If not, it will take time for
the hot water to get from the heater to the fixture.
 Check the recirculation pump for proper flow.
 The inlet filters on the return and inlet connections may need to be
cleaned.
The water is not hot
enough.
 Compare the flow and temperature. See the charts on p. 76.
 Check cross plumbing between cold water lines and hot water lines.
 Is the gas supply valve open fully? (p. 44)
 Is the gas line sized properly? (p. 31)
 Is the gas supply pressure sufficient? (pp. 31 and 62)
 Is the set temperature set too low? (pp. 51 and 60)
The water is too hot.  Is the set temperature set too high? (pp. 51 and 60)
The hot water is not
available when a
fixture is opened.
 Make sure the unit has 120 VAC, 60 Hz power supply.
 If you are using the remote controller and/or temperature controller, is
the power button turned on?
 Is the gas supply valve open fully? (p. 44)
 Is the water supply valve open fully? (p. 44)
 Is the filter on the cold water inlet and return connection clean? (p. 63)
 Is the hot water fixture sufficiently open to draw at least 0.5 GPM
(1.9 L/min) through the water heater? (p. 50)
 Is the unit frozen? (p. 61)
 Is there enough gas in the tank / cylinder? (For Propane model)
The hot water turns
cold and stays cold.
 Is the flow rate enough to keep the water heater running? (p. 50)
 If there is a recirculation system installed, does the recirculation line have
enough check valves? (p. 33)
 Is the gas supply valve open fully? (p. 44)
 Is the filter on the cold water inlet and return connection clean? (p. 63)
 Are the fixtures clean of debris and obstructions?
 Check if the flow rate is too low. (p. 50)
Fluctuation in hot
water temperature.
 Is the filter on the cold water inlet and return connection clean? (p. 63)
 Is the gas line sized properly? (p. 31)
 Is the supply gas pressure sufficient? (pp. 31 and 62)
 Check for cross connection between cold water lines and hot water lines.
Troubleshoong
Owner's Guide

Takagi 540P Indoor Specifications

General

Brand	Takagi
Model	540P Indoor
Category	Water Heater
Language	English