Warmhaus EWA 2525C Installation & Service Manual page 64

Error Code Description of the Error
Possible low gas pressure
E 94
or exhaust recirculation
Intermittent combustion
E 95
value
Flue or air suction way
E 96
blockage
SW error, board start-up
E 98
error fault
E 99 Generic fault
flashing Half Power mode on Lawa
LCD / Lawa Plus models
64
Malfunction Probable Cause
> Gas inlet pressure LOW
> Recirculation on fluegas
path
> Blokage on flue or wrong
Boiler does not work, E94 flue
error code flashing on the > Aging or rust on the
screen electrode
> Electrode position
> Combustion calibration
> Gas valve failiure
> Electronic board
> Harness on electrode
and earth
Boiler does not work, E95
> Aging or rust on the
error code flashing on the
electrode
screen
> Electrode position
> Combustion calibration
Boiler does not work, E96 > Blokage on flue
error code flashing on the > Blokage on air suction
screen path
Boiler does not work, E98
error code flashing on the > Boiler software problem
screen
Boiler does not work, E99
> Boiler electronic
error code flashing on the
hardware problem
screen
> Recirculation on fluegas
path
Boiler continue to work, > Blokage on flue or wrong
flashing screen boiler still flue
operational > Combustion calibration
> Temporary wind
precence
Solution(s)
1-) Call for authorised service at first
2-) Check wrong flue OR flue gas blockage
3-) Check recirculation ( flue gas leak ) from flue gas path to fresh air
side, check flue gas sealings specially
4-) Check any problems on the ionisation electrode, (like
condensation, rust etc.), and control poistioning of the electrode, if
electrode poistion wrong calibrate the electrode.
5-) Check combustion CO or O values on HI and LO mode at
sweeper mode.
6-) Perform Auto Calibration.
7-) if not successfull replace gas valve, and Perform Au-To calibration.
8-) If fault still persists Replace board, but use original service key
from the board dismantled to keep original parameters and calibration
points. If original service key not used aslo adjust P15 releated to the
default value of boiler power and perform Au-To calibration.
Attention: Only authorised service must perform Au-To calibration
1-) Call for authorised service at first
2-) Check intermittent contacts on harness carefully
3-) Check any problems on the ionisation electrode, (like
condensation, rust etc.), and control poistioning of the electrode, if
electrode poistion wrong calibrate the electrode.
4-) Check for condensation on the cabling AND/OR on board
5-) Check earth connection between board and electrode
6-) Check electrode cabeling between board and electrode
7-) Check combustion CO or O values on HI and LO mode at
sweeper mode.
8-) Perform Au-To calibration.
Attention: Only authorised service must perform Au-To calibration
1-) Call for authorised service at first
2-) Check wrong flue OR flue gas blockage
3-) Check recirculation ( flue gas leak ) from flue gas path to fresh air
side, check flue gas sealings specially
4-) Check venturi inlet if its blocked
5-) Check any blockage between fan and burner
6-) Check combustion CO or O values on HI and LO mode at
sweeper mode.
7-) Perform Auto Calibration.
Attention: Only authorised service must perform Au-To calibration
1-) Call for authorised service at first
2-) Replace board direcly, adjust P15 releated to the default value of
boiler power
3-) Perform Au-To calibration.
Attention: Only authorised service must perform Au-To calibration
1-) Call for authorised service at first
2-) Replace board direcly, adjust P15 releated to the default value of
boiler power
3-) Perform Au-To calibration.
4-) if not successfull replace gas valve, and perform Au-To calibration.
Attention: Only authorised service must perform Au-To calibration
1-) If there is strong wind (ie.wind storm) wait until the wind storm
stop then keep using the boiler as it is 36 or 48 hours boiler try to
remove half power mode by it self automatically by increasing power
gradually.
2-) IF problem persist after 48 hours Call for authorised service
3-) Check wrong flue OR flue gas blockage
4-) Check recirculation ( flue gas leak ) from flue gas path to fresh air
side, check flue gas sealings specially
5-) Activate service man menu and dis activate to remove half power
mode
6-) IF problem still persist then perform Auto Calibration
Attention: Only authorised service must perform Au-To calibration
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