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Building Technologies Basic Documentation LMV27... CC1P7541en
28 Error code list (of all LMV2 / LMV3 types) 17.12.2018
Error
code
Diagnostic code Meaning for the LMV27 Recommended measures or causes
91 # Internal error LMV27
93 # Error flame signal acquisition
3 Short-circuit of sensor
Short-circuit at QRB
1. Check wiring.
2. Flame detector possibly faulty.
95 # Error relay supervision
3 Ignition transformer
4 Fuel valve V1
5 Fuel valve V2
6 Fuel valve V3
External power supply active contact
Check wiring
96 # Error relay supervision
3 Ignition transformer
4 Fuel valve V1
5 Fuel valve V2
6 Fuel valve V3
Relay contacts have welded
Test the contacts:
1. LMV27 connected to power: Fan output must be dead.
2. Disconnect power: Disconnect fan. No resistive connection between fan output and neutral
conductor allowed.
If one of the 2 tests fails, release the LMV27 since contact have definitively welded and safety can
no longer be ensured.
97 # Error relay supervision
0
Safety relay contacts have welded or external power supply
fed to safety relay
Test the contacts:
1. LMV27 connected to power: Fan output must be dead.
2. Disconnect power: Disconnect fan. No resistive connection between fan output and neutral
conductor allowed.
If one of the 2 tests fails, release the LMV27 since contacts have definitively welded and safety
can no longer be ensured.
98 # Error relay supervision
2 Safety valve
3 Ignition transformer
4 Fuel valve V1
5 Fuel valve V2
6 Fuel valve V3
Relay does not pull in
Make a reset; if error occurs repeatedly, replace the LMV27
99 # Internal error relay control Make a reset; if error occurs repeatedly, replace the LMV27
3 Internal error relay control
Make a reset. If error occurs repeatedly, replace the LMV27
Software version V03.10: If error C:99 D:3 occurs during standardization of the VSD, deactivate
temporarily function
Alarm in case of start prevention (parameter 210 = 0, when using a release
contact) or
interrupt the load controller-ON signal
100 # Internal error relay control Make a reset; if error occurs repeatedly, replace the LMV27
105 # Internal error contact sampling
0 Pressure switch min Stuck-At failure
Can be caused by capacitive loads or supply of DC voltage to the mains voltage inputs. The
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