Device Display Meaning for the LMV5x System Corrective Action
11 Safety chain burner flange
12 Safety relay feedback
13 Pressure switch gas minimum
14 Pressure switch gas maximum
15 Ignition transformer feedback
16 Fan pressure switch
17 Start release oil
18 Heavy oil direct start
19 Load controller open
1A Load controller closed
1B Start release gas
11 01
Basic unit has detected a short-circuit in the contact feedback
network
Any #
Fault Positioning
Actuator or Fan
Speed Not
Reached
LMV5 has detected a positioning error on one or several
actuators, or the VSD module if equipped.
01-3F
The diagnostic value is made up of the following faults or their
combinations (the individual diagnostic codes are added up in
01
Air
Positioning fault air actuator
02
Active
Positioning fault fuel actuator
04
Aux1
Positioning fault auxiliary actuator 1
08
Aux2
Positioning fault auxiliary actuator 2
10
VSD
Fan Speed Not
The fan in combination with the VSD has not reached the
20
Aux3
Fault Positioning
Positioning fault auxiliary actuator 3
40
VSD
Fan Speed Not
The difference of actual value and speed setpoint is greater
than permitted by parameter
If error occurs on one actuator only :
1) Ensure torque requirements of dampers / valves are
less than actuator output. Actuators running over rated
50% duty cycle may have significantly reduced torque
output.
2) Verify that no damper / valve is bound.
3) If 1 and 2 do not solve the problem: replace actuator.
If error occurs on multiple actuators (01-3F) :
1) Verify that the CANBus wiring is correct.
2) Verify that shields (screens) on CANBus cables are
connected properly.
If error occurs on VSD :
1) Check speed sensor on motor for correct installation,
especially gap between sensor and wheel.
2) Check for filters, damping, and / or delays on the
input signal to the VSD. The VSD should respond to
the input signal in a linear fashion. Extend VSD and
LMV5 ramp times.
15
Fault Positioning
Actuator
Fault with Connected actuators or VSD
Actuator /
VSD
Control
10
Devices
conn. to
LMV5
Internal Fault
Basic Unit
1) Check connections of the neutrals to all of the
connected switches, valves, etc...
2) Check for inductive loads that cause voltage to be
present on the terminal after the LMV de-energizes the
terminal. If voltage exists on an output terminal, such as
a fuel valve, after the LMV de-energizes the terminal,
this will cause a fault. Voltage must drop to zero on the
terminal within about 10 ms after the terminal is de-
energized.
Fault with devices or wiring connected to the Base Unit (LMV5)
Section 7 Page 25 SCC Inc.
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