YASKAWA VS-626M5 Instruction Manual page 194

Troubleshooting
12
Table 12.2 Inverter Faults (continued)
Fault No. Name
YENET1200
YENET1200 card fault
card fault
YENET1200
YENET1200 card memory (com-
card RAM er-
mon RAM) error
ror
YENET1200
YENET1200 card data send/receive
card I/O fault
error (initial handshake error)
1
YENET1200
WDT error between control PCB
card I/O fault
and YENET1200 card
2
YENET1200
YENET1200 card interrupt signal
card I/O fault
timeout error
3
Initial Origin
When the power is turned ON, a
Detection Er-
phase-C signal cannot be detected
ror (For IPM
while detecting the initial origin.
motors only)
Encoder Pulse
The encoder pulse number per rota-
Number Error
tion exceeded the correct value by
(For IPM mo-
±10 pulses.
tors only)
Low Speed
W i n d i n g
The motor speed exceeded the max.
Overspeed Er-
speed for the low speed winding.
ror (For IPM
motor only)
Contents Corrective Actions
Replace YENET1200 card.
S Check the wiring of the C-phase
signal of the encoder.
S Replace the encoder or motor.
S Replace the control card.
S Check the wiring of the encoder
signal lines.
S Check if the encoder signal line
is separated from the main cir-
cuit wiring and other power
cables.
S Check if the motor and the In-
verter are properly grounded.
S Check the encoder cable specifi-
cations. (Check if a shielded
twisted-pair cable is used.)
S Replace the encoder.
Check the external sequence to
verify that the winding change
point is correct.
12 -10
Error Code
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fFff
fFff
fFff