Troubleshooting For Faults In General - Savch S900 Series User Manual

2. TROUBLESHOOTING FOR FAULTS IN GENERAL

Alarm
Check connection of power supply to
terminals L1/R, L2/S, L3/T?
Check voltage output from output
terminals U, V, W.
Motor doesn't
Check motor is not blocked due to load
run
over-large
Check fault of inverters
Check fwd/rev run reference achieved
Check input of Analog frequency setting
Verify operation mode setting
Check wiring for output terminals U, V, W
Contrary rotation
direction of motor
Check wiring for FWD/REV run
Check wiring for analog frequency input
Velocity variation
unavailable for Check operation mode setting
motor running
Check motor is free from overload.
Check specification(number of poles and
voltage)of motor
Motor running
Check gear proportion
speed over high
Check Max output frequency setting
or over low
Check voltage is not dropping at motor
side
Check motor overload
Check load is not in sharp variation
Speed variation
fault during
motor running
Check no phase failure occur to power
supply
Check points
78
Treatment
Input power supply
Supply power again after power firstly interrupted.
Verify voltage class of power supply
Tighten screws for terminals
Supply power again after power firstly interrupted.
Decrease load to make motor running available
Check wiring and correct it if necessary in
accordance with reference for alarm.
Verify wiring for analog frequency input signal
Verify frequency input set voltage
Controlled by digital operator.
Match correctly with terminals U, V, W of motor
Verify wiring and correct if necessary
Verify wiring and correct if necessary
Check and verify operation mode setting
Decrease load
Confirm specification of motor
Confirm gear proportion
Confirm Max output frequency setting
Verify V/f curve setting
Decrease load
Decrease load variation
Increase capacity of inverter and motor.
For single phase mode, fix AC reactor to power
supply side
Verify wiring for Three phase mode.