Siemens LMV51 Series, Basic Documentation, Page: 239 / 299

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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 16 Addendum 1: List of fault status messages of LMV5... system 13.08.2004
Error
code
Diagnostic
code
Device Display Meaning for the LMV5x system Troubleshooting
A6 EC LC Internal Fault Load Controller Invalid branch in eeprom module() *1)
A6 ED LC Internal Fault Load Controller Invalid branch in eeprom module() *1)
A6 EE LC Internal Fault Load Controller Invalid branch in eeprom module() *1)
A6 EF LC Internal Fault Load Controller Invalid branch in eeprom module() *1)
A6 F0 LC Internal Fault Load Controller Fault during ROM test *1)
A6 F1 LC Internal Fault Load Controller Fault during RAM test *1)
A6 F2 LC Internal Fault Load Controller Fault during RAM test, register bank 0 *1)
A6 F3 LC Internal Fault Load Controller Fault during RAM test, IDATA range *1)
A6 F4 LC Internal Fault Load Controller Fault during RAM test, XDATA range *1)
A6 F5 LC Internal Fault Load Controller Stack pointer does not point at stack *1)
A6 F6 LC Internal Fault Load Controller Stack overflow *1)
A6 FE LC Internal Fault Load Controller Fault messages in fault management *1)
A6 FF LC Internal Fault Load Controller Fault messages in fault management *1)
A7 # AZL AZL5…has detected own fault and re-
ported it to the basic unit.
Type of fault: See diagnostic code
Check CAN cabling and terminators as specified
Observe instructions given below, and:
If fault occurs sporadically: Improve EMC
If fault occurs constantly: Replace defective AZL…
A7 01 AZL Internal Fault AZL CRC fault during ROM test
A7 02 AZL Internal Fault AZL CRC fault during RAM test
A7 04 AZL Internal Fault AZL Fault during key value check
A7 05 AZL Internal Fault AZL Time block overflow
A7 07 AZL Internal Fault AZL Sync fault or CRC fault
A7 08 AZL Internal Fault AZL Fault main loop counter
A7 09 AZL Manual Lockout AZL Fault message for emergency off function
via AZL…
A7 0A AZL Internal Fault AZL Invalid AZL5… page
A7 0B AZL >250,000 startups, service required
A7 0C AZL Internal Fault AZL Save fault parameter