Woodward ProTech 203, Руководство по эксплуатации

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Manual 85204 ProTech 203 Overspeed Protection System
Woodward 25
7. Remove the fuses and examine them for defects. Replace any defective or
suspect fuse.
8. Replace the unit's cover and snugly secure the four nuts that hold the cover
in place.
9. If you've been working on Unit A, replace the ribbon-cable clamp onto the
cover (Figure 5-2).
10. Plug in the unit's terminal blocks.
11. Close and latch the front door.
12. Re-power the unit.
13. On the unit's keypad, press RESET to activate the unit's operation.
Changing a ProTech Unit On-Line
To ensure compatibility, the entire unit must be replaced as a
matched set. Do not mix and match boards between units.
Tools and Supplies Needed
•
#2 Phillips screw driver
•
1/4-inch nut driver
•
small flat blade screw driver
•
heat sink compound
Procedure to Remove a Unit from the ProTech Chassis
1. Shut off the power to the unit you're replacing.
HIGH VOLTAGE—Failure to disconnect power to the unit you're
replacing, prior to proceeding can result in exposure to potentially
lethal voltage and therefore possible injury or death.
2. To open the front door, turn the two door latches (counterclockwise) (Figure
5-1).
3. If you're replacing Unit A, remove the ribbon-cable clamp and retain for use
when installing the replacement unit (Figure 5-2).
4. Unplug the power supply board terminal block, then unplug the I/O board
terminal block (Figure 5-2).
5. Remove the four nuts on the unit's cover, and carefully lift the cover off
(Figure 5-2). Retain the cover and the nuts to be reinstalled with the
replacement unit.
Be very careful not to drop any of the nuts or screws as you remove
or replace them. It may be possible for them to get under one of the
adjacent unit covers or contact the exposed back of one of the
display boards on the front cover. If this happens, it is possible for
the part to cause a short on a unit under power and therefore a
possible turbine trip.