Woodward ProTech 203, Руководство по эксплуатации

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Manual 85204 ProTech 203 Overspeed Protection System
Woodward 23
User Repairs
The ProTech device is highly reliable and should require minimal hardware
repairs. Use the above troubleshooting guide to determine the course of action if
a problem does occur.
In some cases, you will need to return the ProTech system to the supplier from
whom your purchased it. However, in other cases, the Troubleshooting Guide will
suggest one of following remedies:
•
Changing a power-supply board fuse
•
Replacing an entire unit (including display, I/O, and power supply boards)
while the other two units continue to function so that the ProTech device
stays on-line
To ensure compatibility, the entire unit must be replaced as a
matched set. Do not mix and match boards between units.
EXPLOSION HAZARD—Substitution of components may impair
suitability for Class 1, Division 2.
Do not disconnect equipment unless power has been switched off or
the area is known to be non-hazardous.
Changing a Power Supply Board Fuse
Tools Needed
•
#2 Phillips screw driver
•
1/4-inch nut driver
•
small flat blade screw driver
•
5/32 inch Allen wrench
Appropriate replacement fuses are CSA- and UL-approved, slow-blow, 5 x 20
mm fuses.
Table 5-1. Power Supply Fuse Data
Power Supply Voltage Fuse Amperage
24 Vdc 1.0 A
120 Vac/dc 0.8 A
220 Vac 0.8 A
Procedure for Changing a Power Supply Board Fuse
1. Shut off the power to the unit in which you're replacing a fuse.
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) see
(Figure 5-1).