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83055116 • 1/2016-05
Installation and Operating Instructions
Gas burner WG20.../1-C ZM-LN (W-FM 25)
9 Faults rectification
The following faults must be rectified only by qualified personnel:
Fault codes
Cause
Rectification
44h
Operating points were changed
u
Re-adjust the burner.
without approval
Parameter
E3
set incorrectly
u
Check parameter
E3
(access level).
Parameter
46
was changed and speed
u
Re-adjust the burner.
was not re-standardized
46h
Rotational direction of the burner motor
u
Check rotation direction of the burner motor.
incorrect
47h
Type of air stepping motor invalid
u
Check parameter 34.
Type of gas stepping motor invalid
u
Check parameter 35.
48h
Plugs of stepping motors for gas and air
u
Change-over the plugs.
mixed-up
Tolerance fault stepping motor
u
Check freedom of movement of air damper and/or
angle drive and gas butterfly valve.
u
Replace the stepping motor.
49h
Stepping motor does not drive correctly
u
Check freedom of movement of air damper and/or
to the reference point.
angle drive and gas butterfly valve.
u
Replace the stepping motor.
53h
Insufficient gas, low gas pressure switch /
u
Check the gas connection pressure.
valve proving gas pressure switch
u
Set correctly the gas pressure switch.
u
Check the gas pressure switch.
