Section 6
Troubleshooting
Troubleshooting 6-1MN1276
Overview
The system troubleshooting procedures involves observing the status of the
“Ready” LED, the “DB On” LED and the “Monitor” 7 segment display. The tables
in this section provide information related to the indications provided by these
devices.
Note: The “Ready” LED can display RED, YELLOW or GREEN color.
Table 6-1 Operating Mode Indications
Ready Monitor Status Cause
OFF OFF Control Disabled No Fault.
Green Decimal
Point
Control Enabled Normal operating mode. No Fault.
Red 1 Over-voltage fault (DC Bus) Missing, damaged or wrong REGEN resistor.
Input voltage too high.
Red 3 Over-current fault.
(More than 2X peak current)
Motor leads shorted or control failure.
Load exceeds motor rating (too much
current).
Accel time set too short.
Red 4 Over or Under-voltage fault. Internal 15VDC supply fault.
Red 5 Resolver fault (or encoder fault). Resolver or cable short circuit or resolver not
connected (open circuit).
Red 6 Electronic fusing
(also see fault 7)
Control current over-load detected by
software.
Red 7 I
2
t limit reached. After a fault is detected,
control will run at nominal output current for
2.5 seconds then stop. The control is disabled
and the Monitor will first display “7” fault then
the “6” fault.
Control Over-Temperature
Cycle time between Acceleration and
Deceleration is too short.
Control should be relocated to cooler area.
Add fans or air conditioning to control
cabinet.
Red 9 User defined fault (see PLC).
Red 0 Processor “Watchdog” timeout Reset control (turn off AC power, wait 1
minute then turn power on).
Green
*
+
Move Command not accepted. More than two move commands have been
sent to the control. To return to normal
status, send a “Quit” or a new move
command to the control.
A non-initialized buffer line has been called
by the Machine inputs. To return to normal
status, call an initialized buffer line by
MA1-4 or send a “Quit” to the control.
Note: To protect the internal fuse, allow at least 1 minute after power down before
turning power on (power Off/On cycle).
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