List of phase display on board LME :
Phase number of
7-segment display
LED
Function
Standby
OFF
Off
Standby, waiting for heat demand
P08
Off
Mains ON / test phase (e.g. detector test)
Startup
P21
Yellow
Safety valve ON, air pressure switch test / POC test (timeout / locking
P22
Yellow
Fan motor ON / air pressure switch test / settling time
P24
Yellow
Actuator opens in prepurging position
P30
Yellow
Prepurging
P36
Yellow
Actuator closes in ignition load / low-fire position
P38
Yellow blinking
Preignition time
P40
Yellow blinking
1st safety time (TSA1) / ignition transformer ON
P42
Green
Safety time (ignition transformer OFF), flame check
P44
Green
Interval: End of safety time and fuel valve 1 (V1) ON
Interval: End of safety time and load controller (LR) release
P50 Green
P50 Green
2nd safety time (TSA2)
P54 Green
P54 Green
P259.01: Actuator opens in > low-fire
P54 Green
P54 Green
P260: Actuator closes in low-fire
oP1 Green
oP1 Green
Interval until release of load controller target (analog or 3-position step
input)
Operation
oP
Green
Operation, modulating operation
Shutdown
P10
Yellow
Shutdown, actuator opens in CLOSE position (home run)
P72
Yellow
Actuator opens in high-fire position / end of operation
P74
Yellow
Postpurging
Valve proving
P80
Yellow
Test space evacuating
P81
Yellow
Checking time fuel valve 1
P82
Yellow
Test space filling
P83
Yellow
Checking time fuel valve 2
Waiting phases (start prevention)
P01
Red / yellow blinking Undervoltage
P02
Yellow
Safety loop open
P04
Red / green blinking
Extraneous light on burner startup (timeout / locking after 30 s)
P90
Yellow
Pressure switch-min open
Lockout
LOC
Red
Lockout phase
4
