3.3 Main Circuit WiringThis section describes the functions, specifications, and procedures required to safely and properly wire the main circuit inthe Z1000 Bypass.NOTICE: Do not solder the ends of wire connections to the bypass. Soldered wiring connections can loosen over time. Improper wiringpractices could result in malfunction due to loose terminal connections.NOTICE: Do not switch the bypass input to start or stop the motor. Frequently switching the bypass on and off shortens the life of the DCbus charge circuit and the DC bus capacitors, and can cause premature bypass failures. For the full performance life, refrain from switchingthe bypass on and off more than once every 30 minutes.u Removing/Reattaching the Bypass Front CoverWARNING! Electrical Shock Hazard. Do not open the front cover of the bypass while the power is on. Failure to comply may result in deathor serious injury. Make sure that the disconnect handle is in the “OFF” position before attempting to open the front cover.n Models Z1B1D002 to D074 and Z1B1B001 to B0771. Turn the disconnect handle to the “OFF” position.Figure 3.2 Disconnect Power2. Remove the two front cover screws using a #2 Phillips screwdriver.3.3 Main Circuit Wiring56 YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual