12 -10
Table 12.2 Inverter Faults (continued)
Fault No. Name Contents Corrective Actions Error Code
YENET1200
card fault
YENET1200 card fault
YENET1200
card RAM er-
ror
YENET1200 card memory (com-
mon RAM) error
YENET120 0
card I/O fault
1
YENET1200 card data send/receive
error (initial handshake error)
Replace YENET1200 card. ---
YENET120 0
card I/O fault
2
WDT error between control PCB
and YENET1200 card
YENET120 0
card I/O fault
3
YENET1200 card interrupt signal
timeout error
Initial Origin
Detection Er-
ror (For IPM
motors only)
When the power is turned ON, a
phase-C signal cannot be detected
while detecting the initial origin.
S Check the wiring of the C-phase
signal of the encoder.
S Replace the encoder or motor.
S Replace the control card.
fFff
Encoder Pulse
Number Error
(For IPM mo-
tors only)
The encoder pulse number per rota-
tion exceeded the correct value by
±10 pulses.
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.
fFff
Low Speed
Winding
Overspeed Er-
ror (For IPM
motor only)
The motor speed exceeded the max.
speed for the low speed winding.
Check the external sequence to
verify that the winding change
point is correct.
fFff
12
Troubleshooting
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