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Troubleshooting
Compressor Running Hot
Compressor
running too hot,
stops and starts
frequently
Improper installation, bad unit
ventilation, not level, direct sunlight,
etc.
Ambient temperature too high Check for operational limits
Check for proper installation per
manual
Filters or coils dirty
Clean indoor coils, lters and
outdoor coils
Indoor or outdoor fans not
operating at correct speeds
Check fan settings and controller
board
Improper voltage
Measure incoming power. Should
be within 10% of nameplate
Incorrect refrigerant charge
Refer to charging procedures, check
for leaks if charge is low. Refrigerant
must be weighed-in by using a
charging scale, pressure charts are
not available.
Poor component wiring
connections
Check U,V,W wire connections as
well as all power connection to and
from board and components
Compressor malfunction
Check resistance of compressor
windings, using a megohm meter.
Check for unusual noise within
compressor
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