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COOLING MECHANICAL CHECKS FLOW CHART
Unit Running?
YES NO
Go to Electrical
Pressure problems? Checks Flow Chart
High Head Pressure Low Head Pressure Low Suction Pressure
Dirty Outdoor Coil Low on Charge Dirty Filters
Inoperative Outdoor Fan Open IPR Valve Dirty Indoor Coil
Overcharge Low Ambient Temperature Inadequate Indoor Air Flow
Recirculation of Inoperative Compressor Inoperative Indoor Blower
Outdoor Air Valves
Non-condensibles Outdoor Check Valve Low on Charge
Closed
Higher than Ambient Restricted Indoor
Air Entering Outdoor Coil Metering Device
Restricted Indoor
Wrong Outdoor Fan Rotation Metering Device Restriction in System
Restricted Recirculation of
Filter Drier Indoor Air
Wrong Indoor
Blower Rotation
Inadequate Ducts
Outdoor Check Valve Closed
Restricted Filter Drier
TROUBLESHOOTING
Troubleshooting
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