List Of Phase Display - Siemens LME7 Series Basic Documentation

Phase number or
3-segment display
and AZL2... display
Standby
OFF
P08
Startup
P21
P22
P24
P30
P36
P38
P40
P42
P44
P50
oP1
Operation
oP
Shutdown
P10
P72
P74
Valve proving
P80
P81
P82
P83
Waiting phases (prevention of startup)
P01
P02
P04
P90
Lockout
LOC
Building Technologies
HVAC Products
21.2.2 Display during startup / shutdown
21.2.2.1. Display of program phases
21.2.2.2.

List of phase display

LED Function
Off Standby, waiting for heat demand
Off Mains voltage ON / test phase (e.g. detector test)
Yellow Safety valve ON, air pressure switch test / POC test (timeout / locking
after 5 seconds), actuator opens in low-fire position
Yellow Fan motor ON / air pressure switch test / stabilization time
Yellow Actuator opens in high-fire
Yellow Prepurging
Yellow Actuator closes in ignition load / low-fire
Yellow blinking Preignition time
Yellow blinking 1st safety time (TSA1) / ignition transformer ON
Green Safety time (ignition transformer OFF), flame check
Green Interval: End of safety time and fuel valve 1 (V1) ON
Interval: End of safety time and load controller (LR) release
Green 2. safety time (TSA2)
Green Interval until release of load controller target (analog or 3-position
step input)
Green Operation, modulating operation
Yellow Shutdown, actuator opens in low-fire position (homerun)
Yellow Actuator opens in high-fire position
Yellow Postpurging
Yellow Test space evacuating
Yellow Checking time fuel valve 1
Yellow Test space filling
Yellow Checking time fuel valve 2
Red / yellow blinking Undervoltage
Yellow Safety loop open
Red / green blinking Extraneous light when burner startup (timeout / locking after 30 second
Yellow Pressure switch-min open
Red Lockout / locking
Basic Documentation LME7...
21 Operation via internal LED
The unit is in Ph ase 21 . The individual program phases are
displayed in accordance with the program sequence.
For color display of signal lamp, refer to «List of phase dis-
play».
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CC1P7105en
13.10.2009