5.2.2 Replace DC SPD
* Screw torque: 0.8 N•m
Figure 5-7: Steps of changing DC SPD
1. Turn off the AC and DC power, and wait until the LED indicators turns off.
2. Follow Section 5.1.1 to open the door.
3. Slide open the protective cover.
4. Loosen 3 screws, remove wires and disconnect signal cable to take off DC SPD.
5. Install the new DC SPD unit with procedures above in reverse order and
tighten the screw with 0.8 N∙m torque.
6. Install the protective cover properly.
7. Follow Section 5.1.2 to close the door.
53
Maintenance
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