Device Display Meaning for the LMV5x System Corrective Action
31
Gas Pressure
at Valve proving:
Valve on Gas
Side leaking
PS(M)-VP (Pressure Switch Valve Proving) has detected
pressure between the gas valves during the atmospheric test.
Switch opened when should have been closed.
1) Bubble test gas valve to ensure that the upstream
valve is not leaking. If leaking, replace valve.
2) Ensure that the setpoint of the PS(M)-VP is 50% of
the pressure upstream of V1 (upstream valve).
32
No Gas Pressure
Valve Proving:
Valve on Burner
Side leaking
PS(M)-VP (Pressure Switch Valve Proving) has detected the
absence of pressure between the gas valves during the
pressure test. Switch closed when should have been open.
1) Bubble test gas valve to ensure that the downstream
valve is not leaking. If leaking, replace valve.
2) Ensure that the setpoint of the PS(M)-VP is 50% of
the pressure upstream of V1 (upstream valve).
33
Oil Pressure on
although Oil
Pump off
Low oil pressure switch is closed when oil pump is not running.
1) Configure oil train so that low oil pressure switch is
off when the oil pump is not running.
2) Check to ensure switch is wired Normally Open.
34
Oil Pressure
below Minimum
Low oil pressure switch is open when oil pump is running.
1) Ensure oil pressure exists at the switch when the oil
pump is running. Adjust pressure reg. if needed.
2) Check to ensure switch is wired Normally Open.
Check setpoint of switch.
35
Oil Pressure
above Maximum
High oil pressure switch is open.
1) Ensure excess oil pressure is not present at the
switch. Adjust pressure reg. if needed.
2) Check to ensure switch is wired Normally Closed.
Check setpoint of switch.
36
No Start Release
for Oil
Switches wired to the start release oil terminal (typically the
atomizing media PS) are not closed when anticipated.
37
No direct Heavy
Oil direct start
Switches wired to the direct start heavy oil terminal are not
closed when anticipated.
38
Lack of Gas
Program
Shortage-of-gas program in progress.
1) If repetition counter is enabled (outside North
America), the LMV is waiting for gas pressure to return.
Any # Parameter of max. safety time faulty
01 Fault with timer1
02 Fault with timer2
03 Fault with timer3
3A Any #
No Burner ID
No burner identification defined
Enter a unique burner Identification. Typically the
3B Any #
No Service
No service password defined Enter a valid service password.
3F Any # Error-free The LMV5 is error-free. None
If fault occurs continuously, replace LMV5.
Fault with Base Unit (LMV5)
Any #
Internal Fault
Basic Unit
1) Check setpoint of switches.
2) Ensure switches are closing and opening at the
correct times (see sequence diagram).
39
Devices
conn. to
LMV5
Fault with devices or wiring connected to the Base Unit (LMV5)
LMV5
Section 7 Page 33 SCC Inc.
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