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DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127
Issue 1
August 1997
Maintenance Object Repair Procedures
Page 10-219CABINET (Cabinet Sensors)
10
1 FAIL The AHD1 circuit pack has reported an air flow problem. The temperature
difference between the air intake and the air exhaust is at least 15
0
C (27
0
F) and the absolute temperature at the top of the cabinet is at least 50
0
C
(122
0
F) (referred to as the 15
0
C/50
0
C criteria). The fans should be
running at high speed.
1. If none of the fans are running, then:
a. Look for and resolve all alarms against the CARR-POW (Carrier
Port Power Unit).
b. Verify -48 volt DC power is available to the fan units. Check the fan
unit wiring harness connector. Check that there is 48 volt DC
between pins 3, 9, 11 and 2, 8, 10.
■ If there is -48 volt DC power at the connector, there should be
power to the fans. If the fans are not running, replace the AHD1. If
the fans still do not run, escalate the problem.
■ If there is no -48 volt DC power at the connector, then the current
limiter card (982LS) is probably defective. Replace the current
limiter card. If the fans still do not run, escalate the problem.
2. If only a few of the fans are not running, replace the defective fans.
3. If all the fans can be started, wait five minutes and rerun the test. If the
test fails again, proceed to Step 4 or 5 as applicable.
Table 10-76. TEST #122 Cabinet Temperature Query Test
[Non-Variable Speed Fans] — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page