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83055116 • 1/2016-05
Installation and Operating Instructions
G
as 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 uRe-adjust the burner.
without approval
Parameter E3 set incorrectly uCheck parameter E3 (access level).
Parameter 46 was changed and speed uRe-adjust the burner.
was not re-standardized
46h Rotational direction of the burner motor uCheck rotation direction of the burner motor.
incorrect
47h Type of air stepping motor invalid uCheck parameter 34.
Type of gas stepping motor invalid uCheck parameter 35.
48h Plugs of stepping motors for gas and air uChange-over the plugs.
mixed-up
Tolerance fault stepping motor uCheck freedom of movement of air damper and/or
angle drive and gas butterfly valve.
uReplace the stepping motor.
49h Stepping motor does not drive correctly uCheck freedom of movement of air damper and/or
to the reference point. angle drive and gas butterfly valve.
uReplace the stepping motor.
53h Insufficient gas, low gas pressure switch / uCheck the gas connection pressure.
valve proving gas pressure switch uSet correctly the gas pressure switch.
uCheck the gas pressure switch.
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