Brochures and Data Sheets

NetSure
™
ACU+ Controller (Advanced Control Unit Plus)
User Instructions, UM1M820BNA (Issue AK, March 3, 2014)
Spec. No: 1M820BNA, 1M820DNA Code: UM1M820BNA
Model No: M820B, M820D Issue AK, March 3, 2014
32
Table 5
Full Alarm Name – WEB
(Abbreviated
Alarm Name - LCD)
Alarm Description Action to Correct
PLC Config Error
(PLC Config Err)
PLC configuration error. Re-enter the PLC logic functions.
485 Communication Failure
(485 Comm Fail)
485 communications failure. --
Minor Summary
(MN Summary)
Minor alarm summary (one or more
alarms designated as minor is active).
Check additional alarms.
Major Summary
(MJ Summary)
Major alarm summary (one or more
alarms designated as major is active).
Check additional alarms.
Critical Summary
(CR Summary)
Critical alarm summary (one or more
alarms designated as critical is
active).
Check additional alarms.
Rectifier Group Lost
(Rect Group Lost)
A rectifier group cannot be detected
by the Controller.
Check communications cables.
Check additional alarms.
Over Voltage 1
(Over Voltage 1)
Output voltage is higher than the
Over Voltage 1 Alarm threshold.
Check to see why system voltage is
high. Check the alarm setting.
Over Voltage 2
(Over Voltage 2)
Output voltage is higher than the
Over Voltage 2 Alarm threshold.
Under Voltage 1
(Under Voltage 1)
Output voltage is lower than the
Under Voltage 1 Alarm threshold.
Check to see why system voltage is
low. If there is a mains failure, check
if some load could be switched off in
order to prolong the operating time of
the plant. If the system load is too
high related to rectifier capacity,
install additional rectifiers. If the
batteries are being recharged, the
alarm will cease by itself when battery
voltage has increased to the charging
level.
Under Voltage 2
(Under Voltage 2)
Output voltage is lower than the
Under Voltage 2 Alarm threshold.
Over Voltage 1 (24V)
(24V Over Volt1)
Output voltage is higher than the
Over Voltage 1 Alarm threshold.
Check to see why system voltage is
high. Check the alarm setting.
Over Voltage 2 (24V)
(24V Over Volt2)
Output voltage is higher than the
Over Voltage 2 Alarm threshold.