YASKAWA T1000V - Page 241

6.3 Drive Alarms, Faults, and Errors
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 241
Troubleshooting
6
■ Minor Faults and Alarms
When a minor fault or alarm occurs, the ALM LED flashes and the text display shows an alarm code. A fault has
occurred if the text remains lit and does not flash. Refer to Alarm Detection on page 256. An overvoltage situation, for
example, can trigger both faults and minor faults. It is therefore important to note whether the LEDs remain lit or if the
LEDs flash.
Table 6.6 Minor Fault and Alarm Displays
LED Operator Display Name
Minor Fault Output
(H2- = 10)
Page
bb Drive Baseblock No output 256
bUS Option Card Communications Error YES 256
CALL Serial Communication Transmission Error YES 256
CE MEMOBUS/Modbus Communication Error YES 257
CrST Can Not Reset YES 257
dEv Excessive Speed Deviation (for Simple V/f with PG) YES 257
EF Run Command Input Error YES 257
to
EF1 to EF6 External Fault (input terminal S1 to S6) YES 258
FbH Excessive PID Feedback YES 258
FbL PID Feedback Loss YES 258
Hbb Safe Disable Signal Input YES 259
HCA Current Alarm YES 259
oH Heatsink Overheat YES 259
oH2 Drive Overheat YES 259
oH3 Motor Overheat YES 260
oL3 Overtorque 1 YES 260
oL4 Overtorque 2 YES 260
oS Overspeed (for Simple V/f with PG) YES 260
ov Overvoltage YES 261
PASS MEMOBUS/Modbus Test Mode Complete No output 261
PGo PG Disconnect (for Simple V/f with PG) YES 261
rUn During Run 2, Motor Switch Command Input YES 261
SE MEMOBUS/Modbus Test Mode Fault YES 261
UL3 Undertorque 1 YES 262
UL4 Undertorque 2 YES 262
Uv Undervoltage YES 262