Daikin Rebel Applied DPSA Installation And Start-Up Manual page 78

Problem Cause
Loose connections
Terminals Overheating
Improperly sized wire
High voltage
Low control voltage
Contactor Hum or Chatter
Dirt on armature of holding coil
Defective contactor
IM 1287 • REBEL APPLIED ROOFTOP
Remedy
Check for obvious signs of terminal and wiring overheating
Tighten and repair as required|
All terminals should be checked and tightened once a year or at the start of every heating
season
All incoming wiring should be sized in accordance with NEC Article 424
Check nameplate voltage is equal to line voltage
Check nameplate voltage is equal to line voltage
Check control voltage, it should not be less than 90% of the contactor coil voltage
Clean contactor armature with low air pressure and a stiff brush
Replace contactor
78
Unit Maintenance
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