8
Instructional Booklet
IB013003EN
Effective June 2023
Instructions for installation, operation,
and maintenance of Magnum 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 “E8” will
appear on the pendant display (see Figure 20) . On the back of the
pendant there is a label that explains the error code and what to do
if the error occurs (see Figure 22) .
Figure 20. Pendant with open/close.
Figure 21. Pendant without open/close.
Figure 22. Pendant error code descriptions.
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CAUTION
THERE ARE NO SERVICEABLE PARTS INSIDE THE CASE OF THE PENDANT.
ATTEMPTING A MODIFICATION OR REPAIR OTHER THAN THOSE EXPLAINED
IN THIS SECTION COULD EXPOSE PERSONNEL TO SHOCK HAZARD FROM
INTERNAL CAPACITORS. OPENING THE CASE OF THE PENDANT TO
ATTEMPT A REPAIR WILL VOID THE WARRANTY.
E1: Motor overcurrent
Condition when motor current is in excess of allowed value . E1
error codes may occur if there is an obstruction in the cell . Operator
should shut off power to the MR2 controller by tripping the circuit
breaker or fuse protecting the controller and manually rack out
the Magnum breaker . The operator should inspect the Magnum
breaker, cassette, levering system subassembly, and controller card
for obvious damage or abnormal conditions . If no obvious issues are
found, check for Magnalube on the primary disconnects and then
reinstall the Magnum breaker .
E2: Open motor circuit
Can occur due to an excessive duty cycle (more than three
consecutive full racking cycles in quick succession without stopping .
one cycle=rack in and rack out) . Once limit is reached, the E2 code
will be displayed for two minutes, allowing the motor to cool . After
the cool down period, the controller can be reset by pressing the
“Enable” and “Disconnect” buttons on the pendant, or over Modbus
RTU communications .
E3: Motor timed out
Condition when motor continues to run in excess of the normal
required time to reach the desired position . This error state
condition can be caused from a malfunction of the MR2 . Operator
should shut off power to the MR2 controller by tripping the circuit
breaker or fuse protecting the controller and manually rack out the
Magnum breaker . Once the Magnum breaker is removed from the
compartment, the operator can replace the damaged devices .
E4: Magnum breaker position “unknown”
Controller does not know the location of the Magnum breaker in the
breaker compartment . The operator must press the “Enable” and
the “Disconnect” buttons on the pendant as the other buttons will
not function . Once the breaker has reached the disconnect position,
the “Disconnect” LED will illuminate and the operator can start the
Magnum breaker racking process again by pressing the “Connect”
or “Test” button and the “Enable” button .
E5: Open permissive
This state is due to a permissive contact being open . It could be
a standard permissive such as the racking door is lifted, the circuit
breaker being closed, or the padlock slider being pushed in . This
could also be a customer supplied permissive such as a door
interlock or a cell switch from another cell to provide interlocking . In
this case, press the “Enable” and “Disconnect” buttons to reset the
controller . Once the permissive switch is closed, any operation will
work .
E6: Communication error
This state may result from damaged communication cable or wiring .
Check all areas of communication wiring (e .g ., discrete, CAT5, or
Modbus controller wiring) . This state may also occur when a breaker
is not inserted into the compartment . Check to make sure the
breaker is fully pushed into the disconnect position and the tertiaries
make good electrical connection (see Figure 3) .
E8: Position switch error
This state occurs when a breaker is not inserted into the
compartment . Check to make sure the breaker is fully pushed
into the disconnect position and the tertiaries make good electrical
connection (see Figure 3) .
MR2 error code display
