7Vmax = Maximum measured phase-to-phase voltage(A to B, B to C, C to A)Vmin = Minimum measured phase-to-phase voltageImbalance Calculation Formula8. Take a final thermal measurement of the capacitor bankand power after finalizing the installation to ensure allconnections are good.9. If a ground fault occurs, then do the following:a. Check for a ground in the motor or motor wiring.b. Check for damage to wiring insulation and thatwiring is dry.c. Verify the motor wiring is separated from groundand there is no connection between phases.d. Check for failed IGBTs.10. If an Overcurrent fault occurs, then do the following:a. Check for excessive load and verify load limit set-tings on the ICVC.b. Check motor and wiring insulation.c. Check parameter settings on VFD_CONF screenin the ICVC.Check Internal Jumpers — On the Main VFD Con-trol board there are two jumpers labeled J1 HARDWARE EN-ABLE and J2 SAFETY ENABLE. J1 should be removed andJ2 should be in place. See Fig. 10.There are two jumper wires that connect a particular termi-nal to chassis ground. The MOV and AC EMI jumper shouldbe connected to the PE-A terminal. The COMMON MODECAPACITORS to GROUND jumper should be connected to astandoff rather than the PE-B terminal.Use the recommended tools as follows when connectingjumper wires in Frame 6 and in Frame 7:• Recommended torque (screws and nuts) = 1.36 N·m(120.0 lb·in)• Recommended hex socket = 7 mm• Recommended screwdriver = T20 star typeSee Fig. 11A and Fig. 11B for the correct positions of thejumpers.Vavg = (VAB + VBC + VCA)3Imbalance % = (Vmax – Vmin) x 100VavgLEGENDNO. NAME DESCRIPTION1 HIM Connector DPI Port 1 (HIM Cradle) connection.2 Fan Connector Power supply for internal cooling fan(Frames 2 & 3).3BatteryReceptacleUser installed CR1220 lithium coin cellbattery provides power to the Real TimeClock (Optional, not supplied).4 DPI Port 2 Cable connection for handheld andremote HIM options.5 Embedded EtherNet/IP Address Selectors Rotary switches for setting lowest octetof EtherNet address (forces address to192.168.1.xxx).6 Embedded EtherNet/IP Connector Network cable connection.7 Jumper J2 SAFETY Safety enable jumper. Removed whensafety option is installed.8Jumper J1 ENABLE Hardware enable jumper. Removedwhen a hardware enable configuration isutilized.9 TB1 I/O terminal block.Fig. 10 — PF755 Main Control BoardTB1 I/O Terminal DesignationsFIXED I/O TERMINAL NAME DESCRIPTIONDi 0ac Digital Input 120V AC Connections for AC power supply.Di C Digital Input Common Digital input commonDi 0dc Digital Input 24V DC Connections for DC power supply.+24V +24 Volt Power Connections for drive supplied 24V power.24VC 24 Volt CommonIMPORTANT: Wiring to pluggable terminal block connectorsshould be supported by wire ties or other means to help pre-vent unintentional disconnectionDi 0acDi CDi 0dc+24V24VCa19-1921