PSN-106:4
PSN-106, PSN-64, PSB-10 • 5403590 • REV A • 12/09
Trouble Condition
Notifi cation Appliance Circuit:
If a trouble occurs on a NAC the associated L.E.D. will fl ash at a 50% rate to indicate a trouble condition, the trouble relay will
also activate during a trouble condition of this type. When the trouble condition has been restored the L.E.D. and trouble relay
will return to their normal state. (See notice.)
DC Power Circuit:
If a trouble occurs on the DC Power output the DC L.E.D. will fl ash at a 50% rate to indicate a trouble condition, the trouble relay
will also activate during a trouble condition of this type. When the trouble condition has been restored the L.E.D. and trouble
relay will return to their normal state. (See notice.)
AC:
When the Power supply detects the A.C. power input has fallen below an acceptable level the AC Power L.E.D. will fl ash at a
50% rate to indicate a trouble condition, the trouble relay will also activate during a trouble condition of this type and after a pro-
grammed delay the Low AC relay will also activate. When the trouble condition has been restored the L.E.D. and trouble relays
will return to their normal state. (See notice.)
Low Battery:
When the Power supply detects the Battery is no longer functioning properly the Low Battery L.E.D. will fl ash at a 50% rate to
indicate a trouble condition, the trouble relay will also activate during a trouble condition of this type. When the trouble condition
has been restored the L.E.D. and trouble relay will return to their normal state. (See notice.)
Ground Fault:
When the Power supply detects a ground Fault condition which indicates a short between the Power Supply ground and the Earth
Ground circuits the Ground Fault L.E.D. will fl ash at a 50% rate to indicate a trouble condition, the trouble relay will also activate
during a trouble condition of this type. When the trouble condition has been restored the L.E.D. and trouble relay will return to
their normal state. (See notice.)
Communication Trouble:
If the Bulk Power Supply and Control Board lose communication with each other the Comm L.E.D. will fl ash at a 50% rate to
indicate a trouble condition, the trouble relay will also activate during a trouble condition of this type. When the trouble condition
has been restored the L.E.D. and trouble relay will return to their normal state. (See notice.)
Standby Operation
Notifi cation Appliance Circuit:
When in standby operation the NAC will be in the reversed supervision polarity and the associated L.E.D. will be off. Exception:
When the NAC is programmed to be an DC Power Output the associated L.E.D. will be on during normal standby operation.
DC Power Circuit:
When in standby operation the DC Power will be on and the DC Power L.E.D. will be illuminated.
AC:
When in normal operation the AC Power L.E.D. will be on steady.
Low Battery:
When in normal operation the Low Battery L.E.D. will be off.
If the trouble memory feature has been enabled the L.E.D. will
provide two brief pulses every second to indicate a trouble
condition has occurred but is now restored. This can be useful
when troubleshooting brief trouble conditions that come and
go over a period of time
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