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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
20 # Pressure switch-min (Pmin)
0 No minimum gas /oil pressure Check wiring for open-circuit
1 Gas shortage – start prevention Check wiri ng for open-circuit
21 # Pressure switch-max (Pmax) / POC
0
Pressure switch-max (Pmax):
Max. gas / oil pressure
exceeded
POC: POC open (software version
≤
V02.00)
Check wiring to see if there is an open-circuit.
POC: Check to see if the valve’s closing contact is closed.
1
POC closed (software version
≤
V02.00)
Check wiring.
Check to see if the valve’s closing contact opens when the valve is controlled.
64
POC open – start prevention (software version
≤
V02.00)
Check wiring.
Check whether valve’s make contact opens when valve is controlled
22 OFF
S
# Safety loop / burner flange
0 Safety loop / burner flange open
1 Safety loop / burner flange open – start prevention
50 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
51 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
55 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
56 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
57 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
58 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
60
0 Internal error: No valid output source Make a reset; if error occurs repeatedly, replace the unit
65 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
66 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
67 # Internal error
Make a reset; if error occurs repeatedly, replace the unit
70 #
Error air-fuel ratio control: Position calculation
modulating
23 Output invalid No valid output
26 Curvepoints undefined Adjust the curvepoints for all actuators
71 # Special position undefined
0 No-load position Parameterize the no-load position for all actuators used
1 Prepurge position Parameterize the prepurge position for all actuators used
2 Postpurge position Parameterize the postpurge position for all actuators used
3 Ignition position Parameterize the ignition position for all actuators used
72 # Internal error air-fuel ratio control
Make a reset; if error occurs repeatedly, replace the unit
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