Instruction manual

21
MECHANICAL CHECKS FLOW CHART
Unit Running?
YES
Low Head Pressure
Low Suction Pressure
Open IPR Valve Dirty Evaporator
Inadequate Airflow
Restricted Filter-drier
NO
Overcharge Low Ambient Temperature
Inoperative Indoor Blower
Indoor Metering
Device Stuck
Closed
Wrong Condenser Fan Rotation
P
ressure problems?
Low on Charge Dirty FiltersDirty Condenser Coil
Recirculation of
Condenser Air
Inoperative Compressor
Valves
Low on Charge
Faulty Metering Device
Restriction in System
Restricted Filter-drier
Non-condensibles
Higher than Ambient
Air Entering Condenser
G
o to Electrical
C
hecks Flow Chart
High Head Pressure
Inoperative Outdoor Fan
Broken Indoor
Blower Belt
Restriction in System
Recirculation of
Evaporator Air
Wrong Evaporator
Blower Rotation
Indoor Metering Device
Stuck Open
Inadequate Ducts