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Building Technologies Division  Basic Documentation LME7...  CC1P7105en 
Infrastructure & Cities Sector  25 Operation via internal LED  29.11.2011 
 
25.2.2.2. List of phase display 
 
Note: 
Display depends on program! 
 
Phase number or 
3-segment display 
and AZL2... display 
LED  Function 
Standby 
OFF  Off  Standby, waiting for heat request 
P08  Off  Power ON/test phase (e.g. detector test) 
Startup 
P21  Yellow  Safety valve ON, air pressure switch test/POC test (timeout/locking 
after 5 seconds), actuator opens in low-fire position/CLOSE position 
P22  Yellow  Fan motor ON/air pressure switch test/settling time 
P24  Yellow  Actuator travels to the prepurge position 
P30  Yellow  Prepurging 
P36  Yellow  Actuator closes until ignition load/low-fire is reached, and  
parameter 259.02: Actuator opens to a position > ignition load 
P38  Yellow flashing  Preignition time 
P40  Yellow flashing  1st safety time/ignition transformer ON 
P42  Green  Safety time (ignition transformer OFF), flame check 
P44  Green  Interval: End of safety time and fuel valve 1 ON 
Interval: End of safety time and release of load controller 
Interval: End of safety time and fuel valve 2 ON 
P50  Green  2nd safety time 
P54  Green  P259.01: Actuator opens to a position > low-fire 
P54  Green  P260: Actuator closes until low-fire position is reached 
oP1  Green  Interval to release of preset load controller (analog or 3-position step 
input) 
Operation 
oP  Green  Operation, modulating operation 
oP1  Green  Operation first stage 
oP2  Green  Operation second stage 
Shutdown 
P10  Yellow  Shutdown, actuator travels to the CLOSED position (home run) 
P72  Yellow  Actuator opens in high-fire position/operation shutdown 
P74  Yellow  Postpurging 
Valve proving 
P80  Yellow  Test space is evacuated  
P81  Yellow  Checking time fuel valve 1 
P82  Yellow  Test space is filled 
P83  Yellow  Checking time fuel valve 2