Error Codes And Troubleshooting - Navien Comfort-Mate EQM301-QSUS User Manual

Error Codes and Troubleshooting

If an error code is constantly displayed on the display window, receive
an inspection by contacting the Navien customer support center in the US.
(877-689-1541).
Error
Error Description
Code
Er02 Water shortage error
Water tank supply
Er05 temperature sensor
error
Water level detection
Er11
Error
Water tank overheating
Er16
error
Er17 Heating disorder Error
Return water temperature
Er18
sensor error
Er28 Water leakage error
Cause
There is a lack of water.
There is a disorder in
the supply temperature.
Normal water level
detection is dysfunctional.
The temperature of the
water tank is overheated.
There is a disorder with
a part related to heating.
There is a disorder in
the return water
temperature sensor.
A water leak caused by a
damaged hose inside
the pad is detected.
Action to Be Taken
Replenish the water
following the replenishment
instructions on the 'Product
Operation' page.
Please contact the A/S center.
Please contact the dealer or
Navien Technical Support.
Please contact the dealer or
Navien Technical Support.
Please contact the dealer or
Navien Technical Support.
Please contact the dealer or
Navien Technical Support.
Please contact the dealer or
Navien Technical Support.
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