Delta M50A 261 Operation And Installation Manual page 60

Maintenance
• Accessing the door
1. Switch DC and AC power off and wait until LED display turns off.
2. To access the door, use procedure found in Section 5.1.1
Do not leave the door opened for long periods of time.
• Changing the SPD modules - use the following procedure:
The AC and DC SPD units are located as shown in Figure 5-5.
• To remove the defective AC SPD
1. Remove 4 self-retaining screws on the A cover. (screw torque: 0.8 N • m)
2. Disengage the 2 signal wiring connectors from the AC SPD PCB.
(4-pin x 1, 2-pin x 1)
3. Remove 4 self-retaining screws which connect to AC terminal from AC SPD PCB.
4. Remove 2 self-retaining screws on the right side and left side of PCB.
5. Lift and remove the entire AC SPD PCB and replace with new unit.
6. Install the new AC SPD using the above procedure in reverse order.
Tighten the 6 screws to a torque value shown in Figure 5-6.
• To remove the defective DC SPD
1. Remove B cover.
2. Disengage Signal, fan and Wi-Fi (option) wiring connectors from the DC
SPD PCB.
3. Disengage A &G self-retaining screws from the DC SPD PCB.
4. Lift and remove the entire DC SPD PCB and replace with new unit.
5. Install the new DC SPD using the above procedure in reverse order.
Tighten the 12 screws to a torque value shown in Figure 5-7.
- Please make sure the copper pillar is firmly tightened before reassembling the
SPD board.
• Closing the door
To close the door, use the procedure found in Section 5.1.2
ATTENTION
60
(Figure 5-6)
(Figure 5-7)