Chapter 7: Service and troubleshooting
138 P/N 3101890-EN • REV 006 • ISS 21JUN18
Label Source Description
Auxiliary Port Two CPU A short or open is detected on the port 2 serial
communication circuit
Data Card Fault Two SLC The VM-SLC card on the loop controller is
missing or loose
Waiting for SDU Download EAEC The database download from the VM-CU is in
progress or incomplete
Panel in Download Mode CPU The panel is out of service to accept download
data
Configuration Fault General A module is in the wrong slot
Network Audio Circuit A Fault CPU There is a loss of signal on the primary audio
connection
Rail Voltage Out of Spec PS10-4B • The rail voltage is >30 VDC or <21 VDC
• There is an excessive rail current load
• The rail is faulty or misadjusted
Telephone Line 1 DACT A line-cut fault is detected on phone line 1
Network Audio Circuit B Fault CPU There is a loss of signal on the secondary audio
connection
Telephone Line 2 DACT A line-cut fault is detected on phone line 2
Receiver Test Line 1 DACT The line 1 test transmission to the CMS failed
Unexpected Card CPU An undefined card is detected
Low Battery Cut Off PS10-4B The battery voltage is below 19.5 VDC when on
battery backup
Receiver Test Line 2 DACT The line 2 test transmission to the CMS failed
AC Brownout PS10-4B AC line voltage is below 93 VAC at 50/60 Hz
RS-232 Channel DACT There is a communication failure with the RS-
card on the module
Battery Trouble PS10-4B • There is an open on the wiring
• The battery voltage is below 20.4 VDC
• The battery internal resistance is too high
(load test failure)
Network Class A Circuit A
Failure
CPU The CPU is unable to receive data on data riser
circuit A
Network Class A Circuit B
Failure
CPU The CPU is unable to receive data on data riser
circuit B
DSP Supervision DACT The DSP chip on the module failed
Power Supply Failure PS10-4B • The cables between the power supply and
CPU are loose or missing
• The power supply is defective
Charger Over Current PS10-4B • The cables between the power supply and
CPU are loose or missing
• The power supply or CPU is defective