Siemens LMV37.4 Series - Page 248

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Building Technologies Basic documentation LMV37.4... CC1P7546en
29 Error code list (all LMV2 types / LMV3 types) 17.12.2018
Error
code
Diagnostic code Meaning for the LMV37.4 Recommended measures or causes
3. Check to see if the torque is sufficient for the application.
90 # Internal error LMV37.4
91 # Internal error LMV37.4
93 # Error flame signal acquisition
3 Short-circuit of sensor
Short-circuit at QRB
1. Check wiring.
2. Flame detector possibly fault.
95 # Error relay supervision
3 Ignition transformer
4 Fuel valve V1
5 Fuel valve V2
6 Fuel valve V3
External power supply NO 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. LMV37.4 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 LMV37.4 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. LMV37.4 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 LMV37.4 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 LMV37.4
99 # Internal error relay control Make a reset; if error occurs repeatedly, replace the LMV37.4
3 Internal error relay control
Make a reset. If error occurs repeatedly, replace the LMV37.4
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 LMV37.4