DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-366CABINET (Cabinet Sensors)
9
1 FAIL VARIABLE-SPEED FAN ASSEMBLIES: One or more fans have
stopped.
If none of the fans are running:
1. Resolve all alarms against ‘‘CARR-POW (Carrier Power Supply)’’.
2. Verify that 48 VDC is available to the fan power filter at the J2F
local cable connector. The voltage range is -42.5 V to -52.5 V.
There should be 48 VDC between the following pin pairs: 2/3, 8/9,
10/11. If -48 VDC is not present, rep lace the CFY1B current limiter
card.
3. If there is 48 VDC at the power filter input, verify that there is 48
VDC at the power filter output using the following procedure
exactly to avoid damage to the fan alarm circuit. Note that the
J2F/P2F connectors on the power filter must be disconnected
whenever connecting or disconnecting the J2/P2 connectors on
the fan assembly.
First
disconnect connector J2F from P2F on the
top of the filter.
Then
disconnect J2 from P2 on the fan assembly.
Reconnect J2F to P2F on the filter. There should be 48 VDC
between the following pin pairs on the J2 connector: 2/3, 8/9,
10/11. If not, replace the fan power filter using the procedure
described previously.
Be sure to disconnect the J2F/P2F
connector again before reconnecting the J2/P2.
If 48 VDC is
present, the fans should have power. Make sure all power
connectors are sound and making good c ontact.
Be sure to
disconnect the J2F/P2F connector again before reconnecting the
J2/P2.
1
(Cont’d.)
FAIL
(Cont’d.)
If some of the fans are running and some are not:
1. Replace the defective fans. If all fans can then be started, wait 5
minutes and rerun the test. If the test fails again, proceed to the
next step below.
2. Remove all 6 white 5-pin connectors on the front and back of the
fan assembly. This will cause all fans to run at high speed and the
alarm to be cleared. If the alarm does not clear, the SYSAM (in a
PPN) or EPN Maintenance circuit pack is incorrectly rep orting the
problem. Check for and resolve all errors against SYSAM or
MAINT, and then rerun the test.
3. One at a time, replace the 5-pin connectors and check to see if
the alarm recurs. Replace each fan whose reconnection causes a
recurrence of the alarm.
Table 9-158. TEST #122 Cabinet Temperature Query T es t — Continued
Error
Code Test
Result Description/ Recommendation
Continued on next page