22
16.2 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 Broken Indoor
Outdoor Air Valves Blower Belt
Non-condensibles Outdoor Check Valve Inoperative Indoor Blower
Closed
Higher than Ambient Low on Charge
Air Entering Outdoor Coil
Restricted Indoor Restricted Indoor
Wrong Outdoor Fan Rotation Metering Device Metering Device
Restricted Restriction in System
Filter Drier
Recirculation of
Reversing Valve Indoor Air
Failure
Wrong Indoor
Blower Rotation
Inadequate Ducts
Outdoor Check Valve Closed
Restricted Filter Drier
To Next Page
Loading...
Need help?
General