Navien Mate EQM 350, User Manual

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Error Code Guide
18
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
Code
Error Description Cause Action to Be Taken
Er02 Water shortage error There is a lack of water.
Replenish the water in the
heating unit.
Er05
Water tank supply
temperature sensor
error
There is a disorder in
the supply temperature.
Please contact the
Navien Technical Support.
Er11 Water level detection
Error
Normal water level
detection is dysfunctional.
Please contact the dealer or
Navien Technical Support.
Er16 Water tank overheating
error
The temperature of the
water tank is overheated.
Please contact the dealer or
Navien Technical Support.
Er17 Heating disorder Error
There is a disorder with
a part related to heating.
Please contact the dealer or
Navien Technical Support.
Er18 Return water temperature
sensor error
There is a disorder in
the return water
temperature sensor.
Please contact the dealer or
Navien Technical Support.
Er28 Water leakage error
There is a water leak
occurring from the pad
or from the boiler.
Please contact the dealer or
Navien Technical Support.