YASKAWA Motoman UP6 Instructions Manual page 414

10.3 Alarm Message List
Alarm Message
Number
1317 SPEED WATCHER
BOARD ERROR
1318 OVERVOLTAGE
(CONVERTER)
[Bit Pattern]
1319 GROUND FAUL
Robot/Station
[Axis Data]
1320 OPEN PHASE
(CONVERTER)
[Bit Pattern]
Alarm Message List
Cause
The error occurred in the speed detective
circuit board.
• Defective speed detective circuit board
• Defective WRCA circuit board
The power supply voltage of direct current
supplied to the amplifier of servopack
exceeded 420V.
• The primary power supply voltage was too
high.(220V,+10%)
• It was too much load.
• Defective converte
• Defective WRCA01 circuit board
One of U,V,W wires of the motor displayed
on axis data was grounded at least.
• Defective the motor
• Ground fault of the motor, lead wire
• Defective WRCA01, WRCF01 circuit board
• Defective amplifier
Any of the three-phase current for primary
side power supply of servopack was open-
phase.
• The wrong wiring of the primary side
power supply connection.
• The decrease of the primary side powe
supply voltage(170V or less)
• Defective WRCA01, WRCF01 circuit board
• Defective converte
10-24
Remedy
• Turn the power off then back on.
• If the error occurs again, replace the
speed detective circuit board and
WRCA01 circuit board.
• Check the primary power supply (220V,
+10%).
• Lower the teaching speed of the fore and
aft steps for alarm occurrence step about
30% and check the reoccurrence. If th
alarm doesn't reoccur, alter the load.
• If the error occurs again, replace the
WRCA01 circuit board and the converter.
This alarm does not occur by turning off
the controlled power supply. But never fail
to turn on the servo power supply after
checking the motor grounding. There is a
possibility the servopack is damaged
when the servo turn-on and off is repeat
ing ground fault status.
• Check the connection of the U,V,W,E
wires of motor again.
• Remove the U,V,W,E wires of the motor
from the terminal of the controller an
check the conduction of U-E, V-E, W-E.
If the wires are conducted, it's abnormal.
• In case an error is found by the above
check, remove the connector of the
motor side and check again. If the wires
are conducted, it is thought to be a
defective lead wire. Specify the error
point and replace the lead wire.
• If the error is not caused by the lead
wire, it is thought to be a defective motor.
• If the error occurs again, replace the
WRCA01 and/or WRCF01 circuit board.
• Replace the amplifier, motor for the axis
where the error occurred.
• Check the connection of the primary side
wiring R,S,T wires of servopack.
• Check that the power supply voltage is
more than 170V.
• If the erro occurs again, replace the
WRCA01,WRCF01 circuit board.
• Replace the converter for the axis where
the error occurred.