Distribution Disconnect Module - Install / Remove - ABB 827E Product Manual

Distribution Disconnect Module - Install / Remove

The Distribution Disconnect Module (DDM) may be removed / installed while the system is DC
powered, as long as CB1 is OFF. When CB1 is OFF the system does not power AC output, an INVERTER
MAJOR Alarm is indicated on the System Controller and the STANDBY LEDs of all inverters of the
shelf will be lit.
NOTE: Equipment powered by the system will not receive AC power from the system when CB1 is
OFF or the Distribution Disconnect Module has been removed.
NOTE: With the distribution monitor still plugged in, wait until all inverters go into Standby
(STANDBY LED lit on all inverters) before removing the module.
Install Distribution Disconnect Module (Refer to Figure 18):
1. With CB1 in the OFF (down) position, insert the new Distribution Disconnect Module.
2. Gently slide the new module into the shelf until it is flush with the rest of the modules.
3. Assure the STANDBY LEDs are lit on all inverters of the shelf.
CAUTION: Do not turn CB1 to ON unless all inverters of the shelf are in STANDBY.
4. Place CB1 in the ON (up) position. The green OK LED on the Distribution Monitor will light. The System
Controller will update (this may take a minute or so), the red INVERTER MAJOR LED will extinguish and the
individual inverters will come on-line with their green OK LEDs illuminating.
5. Tighten the Phillips head module retaining screw located at the bottom of the module.
6. After replacement of any module, refer to the Shelf Turn On and Operational Checkout section to verify proper
operation by performing the initial turn on procedure.
7. Operate the Maintenance Bypass Switch to the Inverter position if equipped.
Removal Distribution Disconnect Module (Refer to Figure 18):
1. Operate the Maintenance Bypass Switch to the Utility position if equipped.
2. Place CB1 in the OFF (down) position
3. Loosen the module retaining screw located at the bottom of the module.
4. Grasp the module removal handle and slowly remove the Distribution Disconnect Module from the shelf.
5. Protect module in an ESD bag.
6. Assure the STANDBY LEDs are lit on all inverters of the shelf.
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