18
warmhaus.com
Error
Code
Description of the
Error
Malfunction
Probable Cause
Solution(s)
E 79
Min regulation
current value
reached
Boiler does not
work, E79 error
code flashing on
the screen
> Gas inlet pressure
> Aging or rust on
the electrode
> Recirculation on
fluegas path
> Blockage in flue
or wrong flue
> Electrode position
> Cabling
disconnections
> Combustion
calibration
> Electronic board
> Gas valve failure
1) Call for authorised service
E 80
Problem on
electronic gas
valve driver
Boiler does not
work, E80 error
code flashing on
the screen
> Electronic board
> Gas valve failure
1) Call for authorised service
E 81
Lock-out for
combustion
problem at starting
(1)
Boiler does not
work, E81 error
code flashing on
the screen
> Strong flue
blockage
> Combustion
problem
> Wrong flue
> Gas inlet pressure
> Aging or rust on
the electrode
> Recirculation of
exhaust gas into
fresh air
> Electrode position
> Combustion
calibration
1) Call for authorised service
E 84
Capacity reduction
for detected
(supposed) low gas
inlet pressure
Boiler operates at
limited capacity,
E84 error code
flashing on the
screen
> Gas inlet pressure
> Combustion
problem
1) If there is strong wind wait until the
wind stop then RESET the boiler
2) IF problem persist Call for authorised
service
E 87
Problem on
electronic gas
valve circuit
Boiler does not
work, E87 error
code flashing on
the screen
> Cabling
disconnections
> Gas valve failure
1) Call for authorised service
E 88
Fault of electronic
gas valve managing
circuit
Boiler does not
work, E88 error
code flashing on
the screen
> Cabling
disconnections
> Gas valve failure
1) Call for authorised service
