Troubleshooting Symptom
Possible Solution
Confirm proper incoming voltage at the bottom of disconnect switch between terminals T1 and T2.
Fan motor does not start
Confirm V1000 VFD display is illuminated and showing a frequency reference ie: F60.00. If fault code is displayed, check VFD manual. Confirm fire suppression equipment is wired correctly (normally closed) between terminals 1 and 3. Check VFD fuses by removing them and testing for continuity across each fuse. Voltage test at the bottom of the fuses is not accurate due to possible back feed from VFD.
Symptom
Possible Solution
Motor is wired incorrectly. Motor can be wired for use on various voltages. Use schematic on name plate of motor to properly connect motor for voltage being applied. Motor is overloaded. Use amp meter to determine if motor is pulling too many amps based on motor name plate. Remote belts from motor and attempt to run with no belts. Single phase motor is connected. Single phase motor will not operate when connected to a VFD.
Fan motor starts but makes humming noise
Symptom
Possible Solution
Check VFD for fault code (see page 8). Use VFD manual to determine how to remedy fault.
Fan motor runs for a few moments then turns off
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