69
9 Faults rectification
The following faults must be rectified only by qualified personnel:
Fault codes
Cause
Rectification
65h
First detailed fault code:
u
Check freedom of movement of air damper and/or
00h
angle drive and gas butterfly valve.
Tolerance fault air stepping motor, gas
u
Replace the stepping motor.
stepping motor or VSD
u
Check the VSD or blower, replace if necessary.
First detailed fault code:
u
Check freedom of movement of air damper and/or
01h
angle drive and gas butterfly valve.
Tolerance fault air or gas stepping motor
u
Replace the stepping motor.
First detailed fault code:
u
Check freedom of movement of gas butterfly valve
02h
Tolerance fault gas stepping motor
u
Replace the stepping motor.
or VSD
u
Check the VSD or blower, replace if necessary.
First detailed fault code:
u
Check freedom of movement of gas butterfly valve
03h
u
Replace the stepping motor.
Tolerance fault gas stepping motor
First detailed fault code:
u
Check freedom of movement of air damper and/or
04h
angle drive and gas butterfly valve.
Tolerance fault air stepping motor
u
Replace the stepping motor.
or VSD
u
Check the VSD or blower, replace if necessary.
First detailed fault code:
u
Check freedom of movement of air damper and/or
05h
angle drive and gas butterfly valve.
Tolerance fault air stepping motor
u
Replace the stepping motor.
First detailed fault code:
07h
Time run out during speed standardization
u
Press [+] key within 20 sec. during speed std.
Time in setting mode run out
u
Press key within 30 min. in setting mode.
Plugs or stepping motors for gas
u
Change-over the plugs or stepping motors.
and air mixed up
A2h
Safety circuit is open
u
Check safety circuit.
A4h
Reverse voltage valve 1
u
Check the wiring to the double gas valves.
A5h
Reverse voltage valve 2
u
Check the wiring to the double gas valves.
A6h
Flame simulation/extraneous light
u
Find and eliminate extraneous light source.
u
Check ionization electrode.
A7h
No flame signal after safety time
u
Set the ignition electrode.
u
Check the ignition unit, replace if necessary
u
Check the ionization electrode and cable, replace if
necessary.
u
Check the gas valves actuators (solenoids or
motors), replace if necessary.
u
Check the mixing pressure, reduce if necessary.
u
Check the burner settings.
u
Replace the combustion manager (see Ch 8.12).
83055116 • 1/2016-05
Installation and Operating Instructions
Gas burner WG20.../1-C ZM-LN (W-FM 25)
