Features - Siemens LME7 Series Basic Documentation

Indication and
diagnostics
Building Technologies
HVAC Products
The LME7... system components (display and operating unit AZL2...) are connected di-
rectly via BCI to the LME7... basic unit. All safety-related digital inputs and outputs of
the system are monitored by a contact feedback network. For intermittent operation in
connection with the LME7..., the ionization probe and optional the UV flame detector
QRA2..., QRA4.U or QRA10... can be used. The burner control is operated and param-
eterized via the AZL2... display and operating unit or via PC tool. The AZL2... display
and operating unit features an LCD and menu-driven operation, offering straightforward
operation and targeted diagnostics. When making diagnostics, the display shows oper-
ating states, the type of error and the meter reading. Passwords protect the different
parameter levels of the burner / boiler manufacturer and heating engineer against un-
authorized access. Basic settings that the plant operator can make on site require no
password.
•
Multicolor indication for operational state and fault state messages via 3-colored
LED
•
Diagnostics of the cause of fault via blink code
•
Extensive service, fault and state information's via built-in 3 x 7 segment display
•
Extensive service, fault and state information's via BCI and AZL2...

2.1 Features

Undervoltage detection
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Electrical remote reset facility
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Accurate control times thanks to digital signal handling
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Multicolor indication of fault state and operational state messages
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Air pressure supervision with function check of air pressure switch during start and
-
operation (gas)
Repetition limitation
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Controlled intermittent operation after 24 hours of continuous operation
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BCI
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Indication of program sequence
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Basic Documentation LME7...
2 System makeup / function description
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CC1P7105en
13.10.2009