Nortel DMS 100 Series Maintenance Manual page 322

9-2 RSC problem solving chart
Table 9-1 RSC-M alarm clearing (Sheet 1 of 3)
Alarm condition
RCO2 Critical
297-8223-550 Standard 04.02 November 2000
Possible cause
Power problems caused both
units to be out of service
(OOS).
Action
Proceed as follows:
1. Verify the RSC-M powers up.
Check for EXT alarm and end aisle
alarm lights.
2. Identify RSC-M in critical state.
3. Post, then busy (Bsy) the defective
RSC-M.
4. Return to service (RTS) the
defective RSC-M.
5. Replace cards that appear in card
list. Use correct card replacement
procedures.
6. If no reply from the peripheral
module (PM), attempt to set the
defective RSC-M again.
7. If reset fails, attempt to load the
defective RSC-M again.
8. Return the RSC-M to service.