Pump Package Troubleshooting - Trane RTAA-70 Installation & Maintenance Manual

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Pump Package
Troubleshooting
Table 21 Pump Package Troubleshooting
Problem
Pumps will not run in hand or auto
Motor runs hot
Noisy Pump/Motor
Pump leaks
Inadequate capacity or pressure
Pump operates then stops
Excess system pressure
Possible Cause
Power to panel is disconnected
Panel disconnect is in off position
Overload relay tripped
Control circuit fuses blown
Loose connection on power circuit
Motor fuses blown
High flow resulting in high amp draw
Incorrect supply voltage
Motor bearings worn
Pump impeller clogged
Inadequate suction pressure
Piping stress
Suction valve closed
Entrapped air
Mechanical seal damaged
Casing gasket damaged
Loose bolts
Wrong pump rotation
Suction pressure to low
Pump or pipe clogged
Air binding
Isolation valve closed
Check valve not holding
Check panel safety features such as
Differential pressure switch failure
Differential pressure switch misadjusted
Remote start/stop signal cycling
Triple duty valve not set correctly
RTAA-SVX01A-EN