Potter PSN-64 - Indicator LED Behavior

PSN-64:14
PSN-106, PSN-64, PSB-10 • 5403590 • REV A • 12/09
Indicator LED Behavior
The NAC control board contains an indicator LED for each NAC circuit and a comm LED:
NAC Led• : Fast Flashing = NAC trouble (EOL missing, EOL shorted, or current limit condition)
NAC Led• : Solid or Pattern = NAC active. LED will follow pattern of NAC
Comm• : Used only to indicate supervision activity between bulk and control boards.
If the trouble memory option is enabled (Trouble Memory dip switch option on) the LEDs indicate if any previous trouble
conditions are stored in memory.
Example: Suppose Trouble Memory is enabled and a NAC circuit EOL is detected as missing. While the EOL is missing,
the LED associated with the NAC will fl ash continuously to indicate the trouble. If the EOL is replaced and the trouble
condition is no longer present, the LED will begin issuing the trouble memory fl ash. This fl ash indicates that a trouble
existed previously, but is no longer present. The trouble memory indication consists of two short fl ashes issued once per
second.
Clear/reset Trouble Memory by setting the Trouble Memory dip switch off, and then back on to enable the feature.
NAC 1 NAC 2
NAC 3 NAC 4
DC PWR
DWG# 3590-17-B
AC Power
Low Battery
Gnd Fault
Comm
DWG# 3590-18
The bulk supply board contains four indicator LEDs:
AC Power• : ON = AC Present, OFF = AC not present).
Low Battery• : Fast Flashing = Low battery condition. ON = Battery Charger Failure
Earth Ground Fault• : Flashing = Earth fault detected.
Comm• : Used only to indicate supervision activity between bulk and control boards
(about one per second).