Warmhaus AQUWA 12 User Manual page 11

Malfunction/
Malfunction/Error Code
Error Code Description
Incorrect network
E 40
frequency measurement
Flame loss after 6
E 41
successive ignitions
Delta T temperature
E 72
difference did not occur
in ignition
Problem in electronic
E 80
gas valve driver
Initial combustion
E 81
lockout/blocking
problem
Combustion problem
E 82
malfunction
Temporary poor
E 83
combustion
Problem in electronic
E 87
gas valve circuit
Gas valve connection
E 88
error
warmhaus.com
Water Heater Status Possible Causes
Incorrect frequency
Device is not functioning
measurement, in mains
and E40 malfunction
with a frequency other 50
code is flashing on the
Hz, tolerance is
screen
+/- 5%
Too much internal heating
Device is not functioning
water demand in a short
and E41 malfunction code
time (1 minute)
is flashing on the screen
Low gas pressure
Device is not functioning
FLOW OR RETURN
and E72 malfunction code
Sensor not on position
is flashing on the screen
Device is not functioning
and E80 malfunction Electronic card
code is flashing on the Gas valve malfunction
screen
Excessive blockage in
the flue
Combustion problem
Incorrect flue
Device is not functioning Gas inlet pressure
and E81 malfunction code Wear or rust on the
is flashing on the screen electrode
Recirculation in the flue
gas path
Electrode position
Combustion calibration
Recirculation
Device is not functioning
incorrect flue selection or
and E82 malfunction code
blockage in the flue
is flashing on the screen
combustion calibration
Recirculation
Device is not functioning
incorrect flue selection or
and E83 malfunction code
blockage in the flue
is flashing on the screen
combustion calibration
Device is not functioning
Broken wiring
and E87 malfunction code
Gas valve malfunction
is flashing on the screen
Device is not functioning
Broken wiring
and E88 malfunction code
Gas valve malfunction
is flashing on the screen
Solution
1-) Call the company that supply the electricity network
2-) If the inlet frequency is 50 Hz +/- 5%, the error disappears
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
1-) Reset / restart the device.
2-) If the malfunction persists, call the Authorized Service.
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