Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 80)

3.3 Main Circuit Wiring
This section describes the functions, specifications, and procedures required to safely and properly wire the main circuit in
the bypass.
NOTICE: Do not solder the ends of wire connections to the bypass. Soldered wiring connections can loosen over time. Improper wiring
practices 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 DC
bus charge circuit and the DC bus capacitors, and can cause premature bypass failures. For the full performance life, refrain from switching
the bypass on and off more than once every 30 minutes.
u Opening the Bypass Enclosure
WARNING! Electrical Shock Hazard. Do not open the bypass enclosure while the power is on. Failure to comply may result in death or
serious injury. Make sure that the circuit breaker is in the “OFF” position before attempting to open the doors.
n Models D024 to D114 and B011 to B124
1.
Turn the circuit breaker to the “OFF” position.
OFF
ON
Figure 3.2 Disconnect Power
2.
Turn the flat head screw fasteners on the cover 1/2 turn counter-clockwise.
3.3 Main Circuit Wiring
80 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual