Installation manual

SAFEPATH Manual Sheet 53 of 78
Rev. C April 1999
Procedure A
If the green NORMAL indicator is off, the yellow TROUBLE indicator is off, and no module indicators are on, a power loss condition
has occurred. A power loss condition may be caused by:
1. A blown fuse on the SAPS module.
2. A blown fuse on the SADC module
3. Loss of AC input power and battery back-up power.
4. Faulty internal wiring between the SAPS module and the SABC module.
5. Faulty internal wiring between SABC module and the backplane module.
6. Faulty SAPS module.
7. Faulty SABC module.
8. Faulty SADC module.
9. Faulty backplane module.
Perform the following:
1. Verify that all fuses on the SAPS module are intact.
2. Verify that all fuses on the SADC module are intact.
3. Verify that AC input power and battery back-up power are present.
4. Verify that the wiring between the SAPS module and the SABC module is intact.
5. Verify that the wiring between the SABC module and the backplane module is intact.
6. Verify that the output voltage of the SAPS module is within its specification.
7. Verify that the output voltage of the SABC module is within its specification.
8. Swap SADC module with a known good module.
9. Replace the backplane module.
Procedure B
If the green NORMAL indicator is on and the yellow TROUBLE indicator is on, a faulty controller module condition has occurred. A
faulty controller module condition may be caused by:
1. A faulty SADC module.
Perform the following:
1. Replace the SADC module.
Procedure C
If the green NORMAL indicator is off, the yellow TROUBLE indicator is on, and the PWR LOW indicator on the SABC is on, an input
power low condition has occurred. An input power low condition may be caused by:
1. A fuse on the SABC module is blown.
2. Low AC input power.
3. A faulty SABC module.
Perform the following:
1. Verify that all fuses on the SABC module are intact.
2. Verify that the AC input power is within the correct operating range.
3. Replace the SABC.
Procedure D
If the green NORMAL indicator is off, the yellow TROUBLE indicator is on, and the BAT LOW indicator on the SABC module is on, a
battery voltage low condition has occurred. A battery voltage low condition may be caused by:
1. Fully discharged batteries.
2. Faulty batteries.
3. A faulty SABC module.
Perform the following:
1. Charge the batteries for 24 hours.
2. Replace the batteries.
3. Replace the SABC module.