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9. TROUBLESHOOTING
Display Name Definition Cause Action
1. Communication cable fault
(Open cable or short circuit)
Repair or change the cable.A. 8E Serial
communication
error
Serial
communication
error occurred
between servo
amplifier and
communication
device (e.g. personal
computer).
2. Communication device (e.g.
personal computer) faulty
Change the communication device (e.g.
personal computer).
8888 Watchdog CPU, parts faulty Fault of parts in servo amplifier
Alarm (8888) occurs if power is
switched on after connectors
CN1A, CN1B, CNP2, CNP3 are
disconnected.
Checking method
Change servo amplifier.
9.2.3 Remedies for Warnings
If A.E1 (overload warning) occurs, operation may be continued but an alarm may take place or proper
operation may not be performed. If another warning (A.E6 or A.E9) occurs, the servo amplifier will go into
a servo-off status. Eliminate the cause of the warning according to this section. Use the optional Servo
Configuration software to refer to the cause of warning.
Display Name Definition Cause Action
A. E1 Overload
warning
There is a possibility that
overload alarm 1 or 2 may
occur.
Load increased to 85% or more of
overload alarm 1 or 2 occurrence level.
Cause, checking method
Refer to A. 50, 51.
Refer to A. 50, A. 51.
A. E6 Servo forced stop EMG-SG are open. External forced stop was made valid.
(EMG-SG opened.)
Ensure safety and deactivate
forced stop.
A. E9 Main circuit off
warning
Servo was switched on
with main circuit power
off.
Switch on main circuit power.