Dewhot NDCT16DH - Error Code Guide (E5, E6, E7, E8); Error E5 Diagnosis and Solution; Error E6 Diagnosis and Solution; Error E7 Diagnosis and Solution

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Dewhot | Gas geyser manual
Code Error Solution
E5
Faulty/damaged or
unplugged output
water temp sensor.
Check whether the water temp. sensor is
unplugged, damgeded or burnt;
Change the sensor
E6
Short circuit of
the outlet water
temperature
sensor
Temperature of
hot water has
exceeded 85°C
Check the gas pressure does not exceed 2,8 kPa at
the gas inlet;
Water pressure suddenly dropped, causing a
temperature spike (check the ow rate is above 3lt/
min with the bucket test);
Change the radiator water temp. sensor for an 85°C
sensor;
Change the outlet temp. sensor
Change the diaphragm valve or controller
E7
The gas ow is
unstable, and has
switched o 5
times continuously
It is normal if it is the rst time operation or the
appliance has been left unused for a long time;
Change the batteries for new batteries;
Check the gas inlet pressure is operating at 2,8 kPa
while the applinace is running;
Change the diaphragm valve or controller
E8
Water ow
capacity is less
than 3L/min - open
circuit of the over
heat temperature
sensor
Check the gas inlet pressure is operating at 2,8 kPa
while the applinace is running;
Water pressure suddenly dropped, causing a
temperature spike (check the ow rate is above 3lt/
min with the bucket test);
Change the gas valve or controller