WEG SSW7000, User Manual

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SSW7000 | 10-3
Troubleshooting and Maintenance
Table 10.2 (cont.): Frequent problem causes
Problem
Most Likely
Causes
Cause Description
Noise at the motor While starting The noise produced by the motor while starting depends on the used starting method and
on the involved times. However, it is continuous, with medium level and with no jerks.
During JOG The SSW7000 JOG function applies a low frequency to the motor, which produces high
and pulsing noises at the motor, according to the JOG level.
While breaking The optimal braking method produces high and intermittent noises at the motor,
which decrease and become more continuous while stopping.
The DC braking method produces constant medium level noises at the motor.
The reverse stopping method produces noises similar to the starting motor noises,
becoming like the optimal braking at the stopping end.
Increase of the motor
current during the
deceleration General
applications The stopping (deceleration) time must only be used with centrifugal hydraulic pump
applications. For other applications P0104 must remain in 0 = Inactive.
Pumps It is normal that during controlled decelerations of centrifugal hydraulic pumps the motor
current increases as the motor stops, because the motor is entering the blocked rotor
condition.
In order to reduce this effect, P0105 can be adjusted for the voltage value (in % of the
motor voltage) present at the moment the motor stops, and this value can be visualized at
P0007.
Refer to the programming manual - P0007 and P0105
HMI display off HMI connection Verify the cable that connects the HMI to the control board C1 (CC11).
Power supply Verify the low voltage power supply at X1 of the FSM board. It must be in the range from 94 to 253 Vac.
Verify the connection between the FSM (XC1) and CC11 (XC60) boards.
Fuse Inspect the FSM board fuse
NOTE!
The operation of alarms and faults is described in the programming manual, chapter 2 - Faults and
Alarms.
10.3. FAULTS ON THE FSMT BOARD
The FSMT power supply board is responsible for supplying the CC11 and CSM electronic boards, and for driving
the relays.
The FSMT board has two versions. The version FSMT.01 modulates a voltage of 66Vac at 400Hz, and is used in
the SSW7000C 6.9kV. The version FSMT.00 modulates a voltage of 87Vac at 800Hz and is used in the other
lines of the Soft-Starter.
The faults presented by the FSMT board are indicated by LEDs. The description of each LED is detailed
table
10.3 .
Table 10.3: Description of the faults indicated by the LEDs of the FSMT board.
LED Description
Fault Actuation
H4 Active processor In the OFF state, the processor is in fault or powered down.
H6 Undervoltage fault
Monitors and actuates if the voltage on the link is below 94.5 Vdc (70
Vac), resets above 121.5Vdc (90 Vac) for Dip2 closed or 90Vdc
(66.6Vac) for Dip2 open.
H8 Overcurrent fault
Above 3.0A (positive or negative). Reset by time after 60 seconds. After
three overcurrent faults in a row, resets by time will no longer occur
(only by powering down the board)
H9 Overload fault
Actuates with current above 1.8A, and resets with current below 1.5A.
It does not check while in the starting ramp. Reset by time after 60
seconds. After three overloads in a row, resets by time will no longer
occur (only by powering down the board)
H10 Overvoltage fault
Actuates above 356 Vdc (263.7Vac) on the link and resets below 324
Vdc (240 Vac).
H11 Overtemperature fault
Actuates with temperature above 90°C (2.22V on the A/D) and resets
with temperature below 80°C (1.99V on the A/D).