Siemens LMV5 Series Technical Instructions page 257

Error Diag.
Device Display
Code Code
Any #
01
02
03
Internal Fault AZL
04
05
07
08
Manual Lockout
09
AZL
0A Internal Fault AZL Invalid AZL5
>250,000
0B startups,
service required
0C Internal Fault AZL Save fault parameter
A7 AZL5
Menu for firing on
0D oil. Current Fuel
is Gas
Menu for firing on
0E gas. Current Fuel
is Oil
15
16
Internal Fault AZL
17
Section 7
Meaning for the LMV5x System
Fault with AZL5...
AZL5 has detected own fault and reported it to the basic unit.
Type of fault: see diagnostic code.
CRC fault during ROM test
CRC fault during RAM test
Fault during stack test
Fault during key value check
Time block overflow
Sync fault or CRC fault
Fault main loop counter
Fault message for emergency off function via AZL
page
250,000 cycles have been exceeded. Internal parts in the
LMV5.. are close to the end of their life.
Fuel changeover from oil to gas when an "oil only" menu is
being viewed.
Fuel changeover from gas to oil when a "gas only" menu is
being viewed.
CAN queue fault
CAN overflow fault
CANBus OFF. A CANBus user (actuators, O2 module)
switches the CANBus to OFF mode.
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Corrective Action
1) Check CANBus cabling. Ensure that all cable shields
(screens) which are located in the cable sheath are
terminated correctly at each actuator, O2 module, and
at the LMV5x...
2) Check each CANBus connector to ensure proper
termination (no conductors exposed on the back of the
plug)
3) If fault occurs sporadically: Reduce electrical noise.
4) If fault occurs constantly: Replace AZL5...
This message is dispayed if escape and enter on the
AZL are pressed simulaneously, causing a manual
lockout. Can be reset normally.
1) If fault occurs sporadically: Reduce electrical noise.
2) If fault occurs constantly: Replace AZL5
Replace LMV5
1) If fault occurs sporadically: Reduce electrical noise.
2) If fault occurs constantly: Replace AZL5
Escape out of current menu, or change the fuel that is
selected.
1) If fault occurs sporadically: Reduce electrical noise.
2) If fault occurs constantly: Replace AZL5
1) Check CANBus cabling. Ensure that all cable shields
(screens) which are located in the cable sheath are
terminated correctly at each actuator, O2 module, and
at the LMV5x...
2) Check each CANBus connector to ensure proper
termination (no conductors exposed on the back of the
plug)
3) Check the wiring of the CANBus power supply (12
VAC transformer). Ensure that fuses FU2 and FU3 are
not blown. Ensure that the CANBus power supply is not
overloaded (too many actuators on CANBus)
SCC Inc.