Trouble Shooting - YASKAWA VS-626MT Series Manual

Trouble
IIS alarm
2 . QL alarm
3 . OV alarm
4 . QC alarm
5 . FU alarm
6 . Motor does not
start
7 . "Z-SPD" doesn't
come at zero speed
1 . Check the resolver wiring
The figure at the right shows the
wave form between terminals 13 and
14 (C)
2 .
I Z . TROUBLE SHOOTING
Check Item
2 . Check the starting and stopping operation frequency
1 . Adjust 8RH(A) if it occures during deceleration
2 . Check the AC Main Supply Voltage
Check the speed reference from N/C (Terminal 33 (A)), output
of speed AMP (CH4(A)) and speed feed back (CH 3(A))
Check the load to see if it exceeds the specifications of the drive
unit
3 . Check the Power Transistors and wiring of the braking circuit
When the power is turned on immediately after it has been turned
off . There is a chance that the OV alarm will appear so wait
three or four minutes before turning on again
1 . Check the six Main Power Transistors
2 .
Check the output circuit (including the motor) for shorts or
excessive impedance to ground
See Item 4
Check the alarm Leds if there are any alarms indicated refer to
items 1 through 5
2 . Check the speed reference from N/C (Terminal 33(A)), the output
of speed AMP (CH4 (A)) and the speed feed back (CH3 (A))
3 .
Check the start interlock signal (Terminal 37 (A) should be 12V)
4 . Check the wiring of resolver and motor
1 . Check the resolver wiring
2 . -Adjust 1RH(A) and / or,6RH(C)
8 . "Agree" doesn'-t
1 .
Adjust 1RH(A) and / or 6RH(C)
come when speed is
correct
9 . The thermal relay ' 1 .
Check the Power Transistor in the braking circuit
in the braking
circuit trips 2 .
Adjust 8RH (A)
ring deceleratio