Cooling Mechanical Checks Flow Chart - Heat Controller HRE1318/1360-1A Installation And Operation Manual

16.2 COOLING MECHANICAL CHECKS FLOW CHART

High Head Pressure
Dirty Outdoor Coil
Inoperative Outdoor Fan
Overcharge
Recirculation of
Outdoor Air
Non-condensibles
Higher than Ambient
Air Entering Outdoor Coil
Wrong Outdoor Fan Rotation
Unit Running?
YES
Pressure problems?
Low Head Pressure
Low on Charge
Open IPR Valve
Low Ambient Temperature
Inoperative Compressor
Valves
Outdoor Check Valve
Closed
Restricted Indoor
Metering Device
Restricted
Filter Drier
Reversing Valve
Failure
NO
Go to Electrical
Checks Flow Chart
Low Suction Pressure
Dirty Filters
Dirty Indoor Coil
Inadequate Indoor Air Flow
Broken Indoor
Blower Belt
Inoperative Indoor Blower
Low on Charge
Restricted Indoor
Metering Device
Restriction in System
Recirculation of
Indoor Air
Wrong Indoor
Blower Rotation
Inadequate Ducts
Outdoor Check Valve Closed
Restricted Filter Drier
21