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AboveAir IOMs
Introduction
Installation
Site Preparation & Mounting
Ductwork & Piping
Refrigerant Piping
Refrigerant Pipe Sizing
Electrical Connections
Auxiliary Device Installation
Operation
Refrigerant Charging
Start-up Procedures
Controller
Controller Navigation
System Menu
Technician Menu
Factory Menu
BMS Connections
Multi-Unit Sequencing
Sensors and Sequences
Maintenance
Troubleshooting
(current)
Support
Symptom: Low Capacity
Possible Cause
: Airflow is outside specification.
Corrective Action
: Units are designed to provide a particular leaving air temperature at a particular CFM. Verify proper air balance.
Possible Cause
: Dirty evaporator coil.
Corrective Action
: Clean coil.
Possible Cause
: Inadequate refrigerant feed.
Corrective Action
: Verify system piping meets piping sizes and requirements. Check TXV operation and filter-dryer.
Possible Cause
: Oil in evaporator.
Corrective Action
: Warm coil and allow oil to drain. Verify risers are trapped per piping documentation.
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