Troubleshooting; Solving Basic Problems - Navien NPE-180A Operation Manual

5. Troubleshooting

5.1 Solving Basic Problems

If you experience a problem with the water heater, refer to the
following chart for possible remedies. Error codes that appear on
the front panel display are explained in the following section.
For minor problems, resetting the water heater may resolve the
issue. To reset the water heater, press the Reset button on the front
panel.
If resetting the water heater and attempting the remedies suggested below do not resolve the problem, contact an authorized technician, a
licensed professional, or Technical Support at 1-800-519-8794 for service instructions.
Problem
No water comes out when the hot water
tap is opened.
The water from the hot water faucet is
cold or turns cold and stays cold.
It takes too long for hot water to reach
the fixtures.
The water is not hot enough.
The water is too hot.
Possible Cause(s)
Is the cold water inlet filter clean?
●
Is an error code displayed on the front
●
panel?
Is the water heater frozen?
●
Is the cold water inlet filter clean?
●
Is the hot water faucet open wide enough
●
draw at least 0.5 gallons of water per minute
(GPM) through the water heater?
Is an error code displayed on the front
●
panel?
If there is an external recirculation system
●
installed, is there a check valve on the
recirculation return line?
Are you using the external recirculation mode?
Is the set temperature too low?
Is the set temperature set too high?
What to do
Ensure that the shut–off valves on the hot
●
and cold pipes are open.
If an error code is displayed, refer to "
●
Understanding Error Codes" on page 16.
Clean the cold water inlet filter. See
●
"4.4 Cleaning the Inlet Water Filter and
Recirculation Inlet Filter" on page 12.
Open the hot water faucet completely.
●
If an error code is displayed, refer to "
●
Understanding Error Codes" on page 16.
Have a contractor install a recirculation return
line from the furthest faucet back to the
water heater.
Check the water heater's temperature
●
setting. Refer to "3.2 Adjusting the Water
Temperature" on page 8.
Check for cross plumbing between the
●
cold and hot water lines.
Check the water heater's temperature setting.
See "3.2 Adjusting the Water Temperature"
on page 8.
5.2
5.2
Troubleshooting 15