User manual

DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-260CARR-POW (Carrier Port Power Unit) for AC-Powered Systems
10
FAIL There is a problem with one or both power units on the tested carrier.
1. For each power unit that has all sttus LEDs OFF, check the AC input to
the power unit at the power unit outlet (see Figure 10-12 and Figure
10-13). If there is no AC, then check the appropriate fuses (see Figure
10-14) for the affected power unit. If the fuses are blown out, replace
the fuses (see ). If the fuses blow out again or AC does not show up at
the power unit outlet, then there is probably a power wiring problem in
the cabinet. Follow normal escalation procedures.
2. At this point AC should be present at the power unit outlet. If the
carrier being tested is the 1A or 2A carrier or the 1B carrier in a High
or Critical Reliability system, refer to "Troubleshooting Control Carrier
Power Units" in Chapter 5, "Routine Maintenance Procedures".
Otherwise, use the recycle carrier PC command (where PC is the
appropriate port network and carrier) in an attempt to bring back the
power units for this carrier.
If the test passes, the trouble is cleared. If the test does not pass, one
power unit, or both, in the tested carrier is defective.
If only one power unit is defective, the status LEDs on the healthy
power unit light green for a moment. When the recycle test determines
that both power units are defective, the software turns off power to
both the good and defective power units. This causes the status
LED(s) on the good power unit to light red.
3. Unplug both power units, and wait about one minute to allow the
power units to cool down. Plug in the power units. If either power unit
is operating properly (that is, the status LEDs show green), then
replace the defective power unit(s). See "Power Unit Replacement
Procedures" in this section.
Table 10-88. TEST #127 Power Unit Query Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page