SECTION 5 Troubleshooting
0855855eng 6/08 5–9
Symptom Possible Cause / Problem Reference / Action
Heartbeat LED on
Control Board blinks
(continued)
Corrupted RAM Reset to factory default.
NOTE: Resetting RAM will
result in a loss of parameters.
If running Rev L software or
lower, loss of job files will also
result.
Failed back light circuit (LCD) SE, 6, Replacing the User
Interface Module
Failed LCD Interface Board SE, 6, Replacing the User
Interface Module
Heartbeat LED on
Control Board does
not blink
No AC input power IN, 2, Connecting the AC
Power
Incorrect AC input voltage
configuration (Soft Start Board)
IN, 2, Changing the Voltage
Configuration
Electrical connection 5200/5400 Block Diagram
Test for properly seated
electrical connections; test for
proper DC voltage levels.
Control board is locked up. SE, 4, LED Indicator on
Control Board
Failed Backplane or Control
Board
SE, 6, Replacing the I/O Panel
Assembly
SE, 6, Replacing the Control
Board
Machine Will Not
Power Up
No AC input power IN, 2, Connecting the AC
Power
Incorrect voltage configuration IN, 2, Changing the Voltage
Configuration
Failed AC circuit breaker IN, 2, Changing the Voltage
Configuration
Verify breaker functionality;
measure line voltage at Soft
Start Board.
Failed Soft Start Board SE, 6, Replacing the Soft Start
Board
Incorrect SW1 settings on
Control Board
SE, 4, Switch Pack 1 Settings
on the Control Board
Normal setting of SW1 is
position 2 inwards, all others
out towards edge of board.
Failed transformer Measure per 5200/5400 Block
Diagram or 2150315
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