RAM DBS II
Refrigeration Solid State Starter
11.0 Maintenance
WARNING: Disconnect all incoming power to this equipment and lock-out and
tag circuits prior to performing preventive maintenance. Discharge
capacitors, if present. Positively ascertain that the equipment is
totally de-energized, including possible foreign sources by using
appropriate metering.
• For equipment to operate properly, and to reduce unscheduled down-time, a periodic maintenance
program should be established. NFPA Publication 70B (Electrical Equipment Maintenance) may be
used as a guide.
• It is recommended that at least once each year the following steps be taken.
Enclosures
• Carefully inspect all enclosure surfaces for signs of excessive heat. As a general rule of thumb, any
temperature which the palm of the hand cannot stand for about 3 seconds may indicate a problem.
• Check all cabinet doors to assure proper operation and that all door latching and/or locking devices
are in proper working order.
• Look inside cabinets for any signs of moisture, dripping, or condensation. Seal off any conduits which
may have dripped condensate or provide an alternate means for drainage. Seal off any cracks or
openings which may have allowed moisture to enter the enclosure and eliminate the source of moisture
on the outside of the enclosure.
• Thoroughly dry all cabinet surfaces which may be damp or wet. If accumulated deposits are apparent,
conduct an electrical insulation test to assure proper insulation integrity.
• If there is an accumulation of dust, remove with a vacuum cleaner or clean with lint-free rags. Do not
attempt to use compressed air as it may contaminate other internal components.
Wiring
• Inspect all accessible wiring for signs of looseness or overheating. Re-tighten to proper torque values
as required. If major discoloration of wire insulation or cable damage is apparent, replace the affected
cable.
• Identify and re-mark all cables in accordance with equipment drawings where required.
Disconnecting Means
• Inspect all terminations for signs of looseness or overheating. Re-tighten to proper torque values as
required.
• Operate each device manually to assure proper operation and test manual trip feature, if equipped.
Check for proper trip settings and adjust if required. Assure that any insulators or arc barriers are
intact and in place.
• Molded case circuit breaker should be kept clean of external contamination.
• If any cracks in its case are visible, the circuit breaker should be replaced.
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11.0 Maintenance
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