WEG SSW7000 - SSW7000 Disconnection Sequence

SSW7000 | 10-5
Troubleshooting and Maintenance
10.4.1. SSW7000 Disconnection Sequence
The safe disconnection sequence is the following:
1. Program P0330 = 1 in order to enter the safe disconnection mode.
2. Parameter P0331 will show the steps of the safe disconnection.
3. The HMI will display P0331 = 0, and also a message asking if the medium voltage power supply was turned
off.
4. Manually open the isolating switch of the SSW7000.
5. After opening the isolating switch, select P0331 and answer “OK”.
6. Then, the main and bypass contactors will be automatically closed and opened in order to eliminate possible
residual voltages on the product.
7. During the entire procedure, messages will be displayed on the HMI screen, informing the sequence of
commands executed by the function.
DANGER!
The whole procedure must be carried out with the SSW7000 panel door closed.
NOTE!
The safe disconnection procedure is for the connections of the circuits on the output of the isolating
switch only. In order to perform operations which require access to the input circuits, make sure
they are not energized.
Table 10.4: Preventive maintenance
Maintenance
I n te r v a l o
I ns t ru ç õ e s
Replacement of fans (if used)
After 50000 operation hours Take out the power arm and replace the fan
Replacement of the HMI battery
Every 10 years
Refer to the chapter 4 - HMI
Table 10.5: Periodic inspections every 6 months
Component
Abnormality
Corrective Action
Terminals, connectors
Loose screws
Tighten
Loose connectors
Fans (if used)
Dirty fans
Cleaning
Abnormal acoustic noise
Take out the power arm and replace the fan
Stopped fan
Abnormal vibration
Printed circuit boards
Accumulation of dust, oil, humidity, etc.
Cleaning
Odor Replacement
Power arms
Accumulation of dust, oil, humidity, etc.
Cleaning
Loose connection bolts
Tighten
Power module bolts
Checking and tighten
Snubber resistors
Discoloration
Replacement
Odor
Heatsinks
Dust accumulation
Cleaning
Dirty