Maintenance and Inspection
Alarm Code
(Alarm/warning History)
Status When Lit
Cause
Remedy
"Fl"
Power supply line not
connected
At main circuit power supply
turn ON
One phase (R, S, or T) of the main
circuit power is not connected to the
power supply.
Check the power supply.
Check main circuit power sup-
ply wiring.
MCCB or noise filter
Check the electromagnetic con-
tactor.
Line voltage of one of the phases is
low.
Check the power supply.
SERVOPACK defective.
Replace SERVOPACK.
Symptom Check Areas and Items
Remedy
Motor will not run with refer-
ence input
Check voltage between R, S and T.
Make sure the alarm indicator is not lit.
Check the N-OT and P-OT signals.
Check SERVOPACK status using the status monitor
command SMON.
Check the AC power supply circuit.
Look for a cause if an indicator is lit.
Symptom Cause Remedy
Poor servo tracking performance
Position loop gain too low
Increase the position loop gain (Cn-001A). Decrease the
speed loop gain when increasing position loop gain
causes hunting.
Note Do not increase the position loop gain any
higher once hunting occurs. This is the tracking
performance limit.
12.2.2 SERVOPACKS
Note The alarm code "00" is reset by turning OFF the encoder power supply (by transferring SENS_OFF command)
or by transferring ALM_CLR command
• Problems due to Defective Wiring or Parts
Table 12.7 Problems due to Defective Wiring or Parts
III Problems due to Setting Errors
Table 12.8 Problems due to Setting Errors
12 -10
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