Appendixes for Technical Personnel
71
Table 3
(Loc. "c")
Err.Code
(Loc. "d") Diagn. Code
Cause
Possible remedy
no Comm
#
No communication between LMV37.4
and AZL2
Check the wiring to exclude interruptions / contact loosening.
2
#
No flame at the end of the safety
interval
1
No flame at the end of the safety
interval 1
2
No flame at the end of the safety
interval 2
4
No flame at the end of the safety
interval 1 (software version £ V02.00)
3
#
Air pressure error
0
Air pressure OFF
1
Air pressure ON
2
Air pressure evaluation
Correct the setting of parameters 235 and 335.
(Disabling of the air pressure control during operation allowed
only with pneumatic operation!)
4
Air pressure ON - Start lock
20
Air pressure, combustion pressure -
Start lock
68
Air pressure, POC - Start lock
84
Air pressure, combustion pressure,
POC - Start lock
7
#
Flame loss
0
Flame loss
3
Flame loss (software version £ V02.00)
3...255
Flame loss with TÜV test (flame loss
test)
The diagnosis corresponds to the time between fuel valve
disabling and flame loss acknowledgement (0.2 second
resolution ® Value 5 = 1 second).
12
#
Leak check
0
The fuel valve 1 leaks (fuel valve 2
with leak check through X5-01)
Through the leak check X5-01 (minimum pressure switch)
-Check if the burner side valve leaks
-Check if the pressure switch for leak check is closed when there
is gas pressure
-Check the wiring to exclude short circuits
1
The fuel valve 2 leaks (fuel valve 1
with leak check through X5-01)
Through the leak check X5-01 (minimum pressure switch)
-Check if the burner side valve leaks
-Check the wiring to exclude short circuits
2
The leak check cannot be performed
The leak check is active, but the minimum pressure switch is
selected as input function for X9-04 (check parameters 238 and
241).
3
The leak check cannot be performed
The leak check is active, but it is not assigned to any input (check
parameters 236 and 237).
4
The leak check cannot be performed
The leak check is active, but 2 inputs are assigned (set parameter
237 on max. pressure switch or POC).
5
The leak check cannot be performed
The leak check is active, but 2 inputs are assigned (check
parameters 236 and 237).
81
V1 leaks
Check if the gas side valve leaks. Check the wiring to exclude
interruptions.
83
V2 leaks
Check if the burner side valve leaks.
Check if the pressure switch for leak check is closed when there
is gas pressure. Check the wiring to exclude short circuits.
20
#
Min gas pressure switch
0
No minimum gas pressure
Check the wiring to exclude interruptions.
1
No gas - Start lock
Check the wiring to exclude interruptions.
22 OFF S
#
Safety circuit
0
Safety circuit
23
#
Minimum pressure switch (Pmin) /
fuel oil immediate start
0
No minimum gas pressure
Check the wiring to exclude interruptions (X5-01).
1
No gas - Start lock
Check the wiring to exclude interruptions (X5-01).
2
Fuel oil immediate start
Check wiring to exclude interruptions (X9-04). Check oil pre
heating function.
240
#
Internal error
Unlock, if it occurs again replace the appliance.
245
#
Internal error
Unlock, if it occurs again replace the appliance.
250
#
Internal error
Unlock, if it occurs again replace the appliance.
