DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-4AC-POWER
9
The AC power supply also prod uces AC ringing voltag e. The AC ringing voltage
output value and frequenc y depend on the c ountry of use. The power supply has
a circuit breaker and EMI filtering.
Nominal Power HoldoverMulti-Carrier Cabinets
Two types of battery holdover are available:
■The small battery assembly provid es short-term battery holdover. If AC
power fails, 48 VDC batteries power the system f or 10 seconds in a PPN
cabinet, for 15 second s in an EPN cabinet, and for 10 minutes in the
control carrier in a Standard Reliability system. The batteries also provide
system power for 5 minutes in the control c arrier in High and Critical
Reliability systems, and for 10 minutes in the exp ansion control carrier in
the "A" position of an EPN cabinet (Release 5r and higher).
■Some AC-powered Multi-Carrier Cabinets c ontain three 48V batteries and
a battery charger (397 C) to provide backup power in case power is
interrupted. The holdover times are id entical to those above.
Single-Carrier Cabinets
A holdover circuit in the p ower supply allows a system to operate n ormally during
AC power interruptions. When AC input po wer fails, reserve batteries supply
power to the memory and p rocessor circuit pac ks and fans for two minutes. All
port circuit p acks are inactive during this time. The power supply contains a
battery charger to c harge the holdover batteries.
Error Log Entries and Test to Clear Values
Table 9-1. AC Power Error Log Entries
Error
Type Aux
Data Associated Test Alarm
Level On/Off
Board Test to Clear Value
01
1. Run the Short Test Sequence first. If all tests pass, run the Long Test Sequence. Refer to the appropriate
test description and follow the recommended proc edures.
0 Any Any Any test environment UU sh r 1
513 Any AC Power Query
Test (#78) WARNING OFF test environment UU sh r 1