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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
A8h
Flame failure during operation
u
Check burner setting.
u
Check the ionization electrode, replace if necessary.
A9h
Flame failure during stabilization time
u
See
A7h
.
AAh
Switch contact of the air pressure
u
Check the air pressure influences.
switch not in stand-by
u
Check the air pressure switch setting.
u
Check the air pressure switch and cable, replace if needed.
u
Replace the combustion manager (see Ch. 8.12).
Abh
Air pressure switch doesn’t react
u
Check the air pressure switch setting.
u
Check the air pressure switch’s hoses.
u
Check the air pressure switch and cable, replace if needed.
u
Check the burner motor and cable, replace if needed.
Adh
Insufficient gas at the low gas
u
Check the gas connection pressure.
pressure switch
u
Check the gas pressure switch, press the reset
button, if needed.
u
Set the gas pressure switch.
AEh
Valve 1 leaking during valve proving
u
Check the soundness of the gas train.
u
Check the setting and function of the gas pressure switch.
u
Replace the valve.
u
Check parameter
E0
.
AFh
Valve 2 leaking during valve proving
u
Check the soundness of the gas train.
u
Check the setting and function of the gas pressure switch.
u
Replace the valve.
b6h
Fault POC contact
u
Check the POC contact
u
Check the gas valves.
bAh
Flame simulation - or -
u
Find and eliminate the extraneous light source.
extraneous light at start-up
u
Check the ionization electrode.
bbh
Burner shutdown via X3:7
-
CAh
Valve proving faulty
u
Check the low gas pressure switch/valve proving
gas pressure switch.
u
Check the gas valves.
Cdh
LDW 2 doesn’t switch
u
Check the air pressure switch setting.
u
Check the air pressure switch’s hoses.
u
Check the air pressure switch and cable, replace if needed.
CEh
Plug No. 15 is disconnected -or -
u
Plug in the plug.
High gas pressure switch
u
Check the gas connection pressure.
doesn’t react
u
Set the high gas pressure switch.
u
Check the high gas pressure switch, replace or
press the reset button, if necessary.
CFh
No start release (X3:14)
u
Check start release.
d1h
Connection to stepping motor faulty
u
Check the connection.
d2h
More than 5 resets in the past 15 min.
u
Rectify the cause of fault.
by remote reset (X3:14)
u
Reset the burner by the operating interface.
d4h
External voltage at op. signal X7:B5
u
Find and eliminate the external voltage source.
Internal unit fault
u
Switch off temporarily the power supply.
u
Reset the burner, replace the combustion manager
if fault re-occurs.
