3-Phase Symptoms And Possible Causes - Remote Access Control Version - nvent SPECTRACOOL S0603 6G Series Instruction Manual

7. The compressor and the condenser (Ambient or "HOT" air) impeller(s) should turn on. Is there
adequate airflow?
YES, proceed to step 8.
NO, possible problem:
» Open motor winding(s)
» Stuck impeller(s)
» Obstructed wheel(s)
» Defective motor capacitor(s)
8. Carefully check the compressor for proper operation - motor should cause slight vibration and the
outer case of the compressor should be warm. Is the compressor showing signs of this?
YES, wait 5 minutes, proceed to step 9.
NO, possible problem:
» Defective start or run capacitor
» Defective overload
» Defective start relay
» Defective contactor
» Defective compressor
9. Make sure the coils are clean then check the evaporator "air in" and "air out" temperatures. If the
temperatures are the same:
» Possible loss of refrigerant
» Possible bad valves in compressor
3-PHASE SYMPTOMS AND POSSIBLE CAUSES - REMOTE ACCESS CONTROL
VERSION
SYMPTOM
Unit won't cool
Compressor tries to start but won't run
Unit blows breakers
Getting water in enclosure
For additional technical support, contact nVent Equipment Protection at 800-896-2665.
89217666
Clogged fins on coil(s)
Dirty filter
Impellers not running
Compressor not running
Compressor runs, but has bad valves
Loss of refrigerant
Low line voltage at start. Should be +/-10% rated voltage.
Compressor motor stuck
Bad contactor
Bad overload switch
Bad run/start capacitor
Undersized breaker/fuse or not time delayed
Short in system
Drain plugged
Drain tube kinked
Enclosure not sealed (allowing humidity in)
Mounting gasket damaged
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Repair or Replace
defective part
Repair or Replace
defective part
Repair or Replace
defective part
POSSIBLE CAUSE
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