7.4 Dimmer Problems Not Related by Phase or a Common Ramp Card
The dimmer pack must be powered down before removing or insert-
ing Ramp Cards.
A) DIMMER FLICKERS AS SYSTEM IS BROUGHT UP.
POSSIBLE CAUSE
1) Defective Ramp Card or SSR.
SOLUTION
Swap Ramp Card with a known good unit. If problem moves,
Ramp Card is defective. Replace Ramp Card and return defec-
tive unit to factory for repair.
Swap SSR with a known good unit. If problem moves, SSR is
defective. Replace SSR.
B) DIMMER DOES NOT FOLLOW COMMANDS.
POSSIBLE CAUSE
1) Defective Ramp Card or SSR.
SOLUTION
Swap Ramp Card with a known good unit. If problem moves,
Ramp Card is defective. Replace Ramp Card and return defec-
tive unit to factory for repair.
Swap SSR with a known good unit. If problem moves, SSR is
defective. Replace SSR.
POSSIBLE
CAUSE
2) Control circuitry open.
SOLUTION
Check and repair control circuitry , motherboard connectors .
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