Device Display Meaning for the LMV5x System Corrective Action
Any # Fault during test of the flame signal amplifier
01 Fault during test of the flame signal amplifier
02
Crosstalk fault between test pin and flame signal amplifier
channel (with LMV52 FSV channel QRI... / QRB...)
03
Crosstalk fault between test pin and FSV channel ION (LMV52
only)
10
Monitoring of redundancy contact on external high-temperature
or flame safegaurd
Check the wiring and the parameters of the external
safety limit thermostat / external flame safeguard
including the redundancy contact.
Any # Fault internal hardware tests
01 Fault during test of the ignition relay
02 Fault during test of the safety relay
03 Fault during voltage supervision test
04 Relay voltage not switched off after reset
Any #
Basic unit has detected an improper circuit at one of the
outputs, a faulty diode, or a short-circuit in the power supply of
the contact feedback network. The diagnostic code indicates
the input affected.
01 Load controller on / off
02 Fan contact
03 Selection of oil-firing
04 Selection of gas-firing
05 Reset
06 Pressure switch oil maximum
07 Pressure switch oil minimum
08 Pressure switch valve proving
09 Safety valve oil feedback
0A Fuel valve 1 oil feedback
0B Fuel valve 2 oil feedback
0C Fuel valve 3 oil feedback
0D Safety valve gas feedback
0E Fuel valve 1 gas feedback
0F Fuel valve 2 gas feedback
10 Pilot valve gas feedback
Fault with Base Unit (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.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
06 LMV5
Internal Fault
Basic Unit
Fault with devices or wiring connected to the Base Unit (LMV5)
LMV5 /
Flame
Dect.
Fault Flame
Detector Test
05
Fault with Flame scanner (QRI) or Base Unit (LMV5)
10
If fault occurs sporadically: Improve shielding / isolation
of flame detector wires. High LMV5 temperatures can
also cause this fault. If fault occurs constantly: Lower
LMV5 temperature, replace flame detector, or replace
LMV5.
Devices
conn. to
LMV5
Section 7 Page 24 SCC Inc.
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