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Building Technologies Basic Documentation LME7... CC1P7105en
15 Operation via internal LED 17.04.2018
Phase number
AZL2 display
LED Function
Waiting phases (start prevention / safety shutdown phases)
P01 Red / yellow flashing Undervoltage
P02 Yellow Safety loop open
↑ Safety shutdown, followed by a non-
alterable lockout with interlocking
P04 Red / green flashing Extraneous light on burner startup (timeout / locking after 30 seconds)
P90 Yellow Pressure switch-min open
↑ Safety shutdown, followed by a non-
alterable lockout with interlocking
Non-alterable lockout
LOC Red Lockout phase