III
4.2.43 Commercial power supply-inverter switch-over function (Pr. 135 to Pr. 139) ................................148
4.2.44 Output current detection function (Pr. 150, Pr. 151).......................................................................153
4.2.45 Zero current detection (Pr. 152, Pr. 153)........................................................................................154
4.2.46 RT signal activated condition selection (Pr. 155) ...........................................................................155
4.2.47 Stall prevention function and current limit function (Pr. 156)..........................................................155
4.2.48 OL signal output timer (Pr. 157) .....................................................................................................157
4.2.49 User group selection (Pr. 160, Pr. 173 to Pr. 176) .........................................................................158
4.2.50 Watt-hour meter clear/actual operation hour meter clear (Pr. 170, Pr. 171) ..................................159
4.2.51 Input terminal function selection (Pr. 180 to Pr. 186) .....................................................................159
4.2.52 Output terminal function selection (Pr. 190 to Pr. 195) ..................................................................162
4.2.53 User initial value setting (Pr. 199) ..................................................................................................164
4.2.54 Programmed operation function (Pr. 200 to Pr. 231) .....................................................................165
4.2.55 Cooling fan operation selection (Pr. 244).......................................................................................169
4.2.56 Stop selection (Pr. 250)..................................................................................................................170
4.2.57 Output phase failure protection selection (Pr. 251)........................................................................171
4.2.58 Override bias/gain (Pr. 252, Pr. 253)..............................................................................................171
4.2.59 Power failure-time deceleration-to-stop function (Pr. 261 to Pr. 266) ............................................172
4.2.60 Stop-on-contact, load torque high-speed frequency selection (Pr. 270) ........................................173
4.2.61 High-speed frequency control (Pr. 271 to Pr. 274).........................................................................174
4.2.62 Stop-on-contact control function (Pr. 275, Pr. 276)........................................................................178
4.2.63 Brake sequence function (Pr. 278 to Pr. 285) ................................................................................181
4.2.64 Droop control (Pr. 286, Pr. 287) .....................................................................................................185
4.2.65 Capacitor life alarm (Pr. 503, Pr. 504)............................................................................................186
4.2.66 FM / AM terminal calibration (Pr. 900, Pr. 901).............................................................................187
4.2.67 Frequency setting voltage (current) bias and gain (Pr. 902 to Pr. 905)..........................................189
4.2.68 PU buzzer control (Pr. 990)............................................................................................................194
CHAPTER 5 PROTECTIVE FUNCTIONS 195
5.1 Errors (Alarms)................................................................................................ 196
5.1.1 Error (alarm) definitions..................................................................................................................196
5.1.2 To know the operating status at the occurrence of an alarm .........................................................205
5.1.3 Correspondences between digital and actual characters...............................................................205
5.1.4 Alarm code output ..........................................................................................................................206
5.1.5 Resetting the inverter .....................................................................................................................206
5.2 Troubleshooting............................................................................................... 207
5.2.1 Motor remains stopped...................................................................................................................207
5.2.2 Motor rotates in opposite direction .................................................................................................207
5.2.3 Speed greatly differs from the setting.............................................................................................207
5.2.4 Acceleration/deceleration is not smooth.........................................................................................207
5.2.5 Motor current is large .....................................................................................................................207
5.2.6 Speed does not increase................................................................................................................208
5.2.7 Speed varies during operation .......................................................................................................208
5.2.8 Operation mode is not changed properly .......................................................................................208
5.2.9 Operation panel (FR-DU04) display is not provided.......................................................................208
5.2.10 POWER lamp is not lit....................................................................................................................208
5.2.11 Parameter write cannot be performed............................................................................................208
CHAPTER 6 PRECAUTIONS FOR MAINTENANCE AND INSPECTION209
6.1 Precautions for maintenance and inspection ............................................... 210
6.1.1 Precautions for maintenance and inspection .................................................................................210
6.1.2 Check items....................................................................................................................................210
