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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 28 Error code list 01.12.2009
Error
code
Diagnostic code Meaning for LMV37.4… system Recommended measures
98 # Error relay supervision
2 Safety valve
3 Ignition transformer
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
Relay does not pull in Make a reset; if error occurs repeatedly, replace the unit
99 # Internal error relay control
Make a reset; if error occurs repeatedly, replace the unit
100 # Internal error relay control
Make a reset; if error occurs repeatedly, replace the unit
105 # Internal error contact sampling
0 Pressure switch min
1 Pressure switch max / POC
2 Pressure switch valve proving
3 Air pressure
4 Load controller open
5 Load controller on / off
6 Load controller closed
7 Safety loop / Burner flange
8 Safety valve
9 Ignition transformer
10 Fuel valve 1
11 Fuel valve 2
12 Fuel valve 3
13 Reset
Stuck-At failure
Can be caused by capacitive loads or supply of DC voltage to the mains voltage inputs. The diag-
nostic code indicates the input where the problem occurred
106 # Internal error contact request
Make a reset; if error occurs repeatedly, replace the unit
107 # Internal error contact request
Make a reset; if error occurs repeatedly, replace the unit
108 # Internal error contact request
Make a reset; if error occurs repeatedly, replace the unit
110 # Internal error voltage monitor test
Make a reset; if error occurs repeatedly, replace the unit
111 # Mains undervoltage
Mains voltage to low
Conversion factor diagnostic code
→ voltage value (AC 230 V: 1,683; AC 120 V: 0,843)
112
0 Mains voltage recovery Error code for triggering a reset on power restoration (no error)
113 # Internal error mains voltage supervision
Make a reset; if error occurs repeatedly, replace the unit
115 # Internal error system counter
116
0 Designed lifecycle exceeded (250,000 startups) Warning threshold has been reached. The unit should be replaced
117
0
Life time exceeded
Operation no longer allowed
Switch-off threshold has been reached
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