25
Midco International Inc.
8471 95
Part 2 Service - Trouble Shooting for 120V Burners
SIEMENS CONTROL - LOCK CODES / ERROR
Error code
Clear text
Possible cause
AZL2...
7-segment
Loc: 2
Loc 2
No establishment of
fl
ame at end of
safety time
- Faulty or soiled fuel valves
- Faulty or soiled
fl
ame detector
- Poor adjustment of burner, no fuel
- Faulty ignition equipment
Loc: 3
Loc 3
Air pressure faulty (air pressure
switch welded in no-load position,
decrease to speci
fi
ed time) (air pres-
sure switch
fl
ame-on response time)
Air pressure switch faulty
- Loss of air pressure signal after speci
fi
ed time
- Air pressure switch has welded in no-load
position
Loc: 4
Loc 4
Extraneous light
Extraneous light during burner startup
Loc: 5
Loc 5
Air pressure faulty, air pressure
switch welded in working position
Time supervision air pressure switch
- Air pressure switch has welded in working
position
Loc: 7
Loc 7
Loss of
fl
ame
Too many losses of
fl
ame during operation
(Limitation of repetitions)
- Faulty or soiled fuel valves
- Faulty or soiled
fl
ame detector
- Poor adjustment of burner
Loc: 10
Loc 10
Error not relatable (application)
Internal error
Wiring error or internal error, output contacts,
other faults
Loc: 12
Loc 12
Valve proving
Fuel valve 1 leak
Loc: 13
Loc 13
Valve proving
Fuel valve 2 leak
Loc: 14
Loc 14
POC error
Error valve closure control POC
Loc: 22
Loc 22
Safety loop open
- Gas pressure switch-max open
- Safety limit thermostat cut out
Loc: 60
Loc: 60
Analog power source
4...20 mA, I <4 mA
Wire breakage
Loc: 83
Loc: 83
Faulty PWM fan
- PWM fan does not reach the target speed
within the preset period of time, or
- After reaching the target speed, the PWM fan
leaves the tolerance band again (parameter
650) for a time exceeding the tolerance time
speed deviation (parameter 660)
Loc: 138
Loc 138
Restore process successful
Restore process successful
Loc: 139
Loc 139
No program module detected
No program module plugged in
Loc: 167
Loc 167
Manual locking
Manual locking
Loc: 206
Loc 206
AZL2... incompatible
Use the latest version
Loc: 225
Loc 225
Faulty PWM fan
- Fan speed dropped the minimum prepurge
PWM (parameter 675.00) after reaching the
prepurge speed, or
-After reaching the ignition load speed, the
maximum ignition load PWM (parameter 675.01)
was exceeded
Loc: 226
Loc: 226
Faulty PWM fan
Parameterization error:
- Speed low-
fi
re > speed high-
fi
re, or
- Low-
fi
re = 0 rpm, or
- Maximum speed = 0 rpm
Loc: 227
Loc 227
Faulty PWM fan
One or several parameters violate the minimum/
maximum limit
XVI Trouble
Shooting
for 120V Burners
Continued
D Direct
Spark -
Siemens
Control
Lock/
Error
Codes
Continued
Chart 8
- Siemens Control - Lock Codes - Error Code List - 120V Burners
