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Table 12 Troubleshooting
-
Corrective Actions
Condition
Possible Cause
Corrective Action
6.
Disconnect loads from the 827e SYSTEM:
A.
With Maintenance Bypass Switch (MBS)
-
Operate the MBS
to the UTILITY position.
B.
Without MBS
NOTE: The following procedure will result in loss of
power to the load unless load.
Turn OFF all load circuit breakers to disconnect all loads
from the system.
7.
Turn OFF CB1 on the Distribution Disconnect Module of all
shelves.
8.
Turn ON CB1 of one shelf.
9.
Observe whether operation is normal or Plant Hz Fault..
10.Turn OFF CB1.
11.Repeat for steps 3 through 5 for each shelf, individually.
12.Remove all Inverters from a shelf observed in step 4 as Plant
Hz Fault..
13.Insert one inverter.
14.Observe whether operation is normal or Plant Hz Fault..
15.Remove the Inverter.
16.Repeat steps 8 through 10 for each inverter in the shelf
17.
Repeat from step 7 for each shelf.
18.Replace failed Inverters observed as Plant Hz Fault in step 14.
19.Reinsert all inverters.
20.Operate MBS to THE INVERTER position
or
Turn ON all load circuit breakers to reconnect all loads to the
system.
21.Turn ON system per the Shelf Turn On and Operational
Checkout section.
System Controller
Displaying "XXX"
I2C bus fault
1.
Check ribbon on back of shelf.
2.
Unseat one inverter at a time to see if inverter is crashing I2C
bus.
Alarm Display "15 CAL
TABLE/S"
1.
Verify current on each inverter.
If a module is not load sharing replace it.
1.
If inverters are load sharing, replace DM.
Inverter not Recognized
1.
Try another inverter in slot.
2.
Verify address jumpers on inverter slot back
-
plane.
Output Voltage Display
Value Twice or Half of
Actual Voltage
Distribution Disconnect
Module backplane JP1
jumper incorrect
1.
Verify JP1 at upper right rear of Distribution Disconnect
Module back
-
plane.
