Eaton VC-W MR2, Instructional Booklet

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Instructional Booklet IB022010EN
Effective July 2019
Revision #4
Instructions for installation, operation,
and maintenance of medium voltage
VC-W MR2 (integral racking)
EATON www.eaton.com
Diagnostics/troubleshooting
The integrated racking controller programming has built-in
diagnostics and error detection . If an error occurs, “E1” to “E9” will
appear on the pendant display (see Figure 6 ) . On the back of the
pendant there is a label that explains what the error is and what to
do if the error occurs (see Figure 9 ) .
Figure 6. MR2 Error code display.
Figure 7. MR2 O/C error code display.
Figure 8. MR2 O/C error code display with out
connect/disconnect.
Figure 9. MR2 error code display.
Figure 10. MR2 O/C error code display.
E1: Motor overcurrent
Condition when motor current is in excess of allowed value . Multiple
causes could create this condition . E1 error codes may occur if
system is operated on temporary generator power . Operator should
shut off power to the VC-W MR2 controller by tripping the 15 A
circuit breaker (see Figure 11 ) in the LV compartment and manually
rack out the MV device . The operator should inspect the MV device,
levering system subassembly, and controller card for obvious
damage or abnormal conditions . If no obvious issues are found,
reinstall the MV device .
E2: Open motor circuit
Can occur when the motor thermal switch opens, possibly caused
by an excessive duty cycle (more than 10 consecutive operations in
quick succession without stopping) . Once the thermal switch closes
(motor cools down), the controller can be reset by pressing the
disconnect switch .
An open motor circuit as shown ( Figure 1 and 2 ) will also cause this
error . Use troubleshooting as shown with Figure 1 and 2 .