Delta M100A 283

Regularly maintenance can ensure that the inverter can keep great performance.
DELTA recommends to have a check to the unit every year at least.
The frequency of maintenance should be adjustable depends on the environment
of the site, different seasons and weather impacts.
5 Maintenance
- Ensure DC and AC cables are always de-energized during the maintenance to
avoid the shock hazard risk!
- Without rain cover, never perform maintenance operations under rainy conditions.
5.1 Open and Close the Door
1. Disconnect the AC Circuit breaker and secure to against reconnection.
2. Turn two DC switches to off position, then secure to against reconnection.
3. Wait 60 seconds and make sure LED indicators of the inverter have gone out.
4. To ensure there is no current in the cables, please use a current clamp to
measure DC/AC cables.
5.1.1 Disconnect from Voltage Sources
5.1.2 Open the Door
Before opening the front door, please wipe the inverter case if it is wet to
avoid water seepage.
1. Remove screws of the antenna bracket as Figure 5-1-①.
2. Use the 4mm hexagon wrench to loose the screw of the protection cover, and
then release the latch locks as Figure 5-1-④.
3. Open the front door and use the hexagon wrench to fix the door as Figure 5-2.
4. The inverter door can be removed for wider working space during installation
or maintenance as Figure 5-3.
Do not leave the door opened for long periods of time.
DANGER : ELECTRICAL HAZARD!!
5.1.3 Close the Door
- Excessive moisture or dust in the inverter could cause unexpected damage
due to the corrosion on the live part. Ensure the inner of the inverter clean
without unreasonable pollution is important for a lifetime operation system.
ATTENTION
1. Make sure that the terminals or viewable live parts are clean without sundries,
dust even liquid.
2. All protection covers are installed well.
3. Remove the hexagon wrench (Figure 5-2) and close the door.
4. Buckle the latch lock as Figure 5-4-①and apply a brand new one-time-use
security seal (item 8, Table 2-1) on the toggle latch as Figure 5-4-②.
5. Fix the protection cover by the hexagon wrench as Figure 5-4-④.
6. The hexagon wrench can be fixed on the protection cover as Figure 5-4-⑤.
7. Fix the antenna with its bracket by 0.98 N-m torque.
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Maintenance