Fnd Display; Basic Troubleshooting (Faq) - Navien CH-180 Operation Manual

Combination water heater operation
█

FND Display

 LED read out shows supply water temperature and pressure for space heating
in 5 Sec intervals, unless shows Error code.
█
Basic Troubleshooting and Frequently
Asked Questions
 If an „Error Code‟ displays on the remote controller, follow the troubleshooting
chart below before contacting your installer, service contractor or NAVIEN
representative.
 Troubleshooting step #1 is to turn the unit OFF and then ON to reset the
Navien combination water heater.
 If after resetting and following the steps outlined below, the combination water
heater does not return to consistent operation, contact your installer, service
contractor or Navien for service instructions.
Problem
There is no water at all
when the hot water tap
is opened.
When the tap is
opened, there is no hot
water or the hot water
turns cold and stays
cold.
The water is not hot
enough.
The water is too hot.
40
Possible Cause(s)
• Is the cold water filter
clean?
• Is the unit display
flashing an error code?
• Is the unit frozen?
• Is the hot water fixture
sufficiently open to draw
at least 0.5 GPM through
the combination water
heater?
• Is the unit display
flashing an error code?
• Is the set temperature
too low?
• Is the set temperature set
too high?
What to do
• Make sure the shut–
off valves on the hot
and cold pipes are
open.
• Check if there is any
error code flashing on
the remote controller.
• Check if there is any
error code flashing on
the remote controller.
• Check unit‟s
temperature setting.
• Check for cross
plumbing between
cold and hot water
lines.
• Check unit‟s
temperature setting.