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The residual water in the heater may be frozen in the winter, this is bad for the heater, so you must drain
the water after use. (Please refer to the drain methods.).
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In order not to create scaling, please close the gas valve after using the heater, let the hot water out of the
appliance. When the outlet of the hot water is cold, close the cold water valve.
Cleaning
: The water heater should be cleaned annually, keep the dust away from flue gas passageway. See
the Cleaning Instructions below.(Only for service engineer)
1).Turn off power, shutoff gas supply;
2).Wait one hour to cool down water heater;
3).Remove the front cover, by taking out Cover Screw;
4).Using compressed air or equivalent to clean the area between the fins and the heat exchanger;
5).Do not unscrew or move any other parts of water heater;
6).After Cleaning, put the front cover back.
Error Codes
Error
Code
Description
Reasons/Repair
E0
Inlet water temperature
sensor.
◎
Possible short in sensor/may need
replacement of sensor/check wire to water
temperature sensor it may be disconnected.
E1
Ignition fail or lost
flame
◎
Hardware error in detecting the flame
feedback
◎
No flame detection after ignition 6 seconds
◎
Lost flame when burning/check gas supply
E3
Fan voltage error
◎
Fan driver error, cannot detect voltage or
current/check power supply.
◎
Vent pipe is blocked or wind pressure is to
high/check flue pipe-exhaust for blockage.
E4
Fan error
◎
Fan not working/check power supply.
◎
Low fan speeds/check for blockage of
exhaust
E5
Overheat
◎
Water temperature more than (185°F/
85°C)/outlet water temperature sensor not
working/thermostat is not working
properly/loose wire to sensor
E6
Outlet water
temperature error
◎
Possible short in sensor/may need
replacement of sensor/check wire to water