New and Original Industria Yaskawa AC Servo Motor SGMG Series 850W 200V SGMG-09V2ACS

Confirm proper system line voltage is connected. Measure the voltage at the High Voltage POWER connections L1 (black) and L2/N (white). On 115VAC systems, Neutral should be connected to L2/N. The power connected to these taps should be continuous un-switched line voltage. This voltage alone will not operate the motor. If proper voltage is not present, troubleshoot the HVAC system. Continue troubleshooting here after proper voltage has been confirmed

Confirm there is a 115VAC demand on any one or all of the High Voltage SIGNAL connections. The High Voltage SIGNAL connections of the motor should only be connected to the HVAC Systems 115VAC fan controls (fan relay or circuit board) connections. On 230VAC systems, the 115VAC line voltage connected to the High Voltage POWER L1 (Black) wire must be the same polarity as the 115VAC fan output voltage from the HVAC system controls. If proper voltage is not present, troubleshoot the HVAC system. On 230VAC systems, measure the voltage from the High Voltage Signal Connection(s) to the High Voltage Power L2 connection. If this reading is not 230VAC, reverse the High Voltage Power L1 and L2 connections from the motor.

If there is a 115VAC demand on one or more of the High Voltage SIGNAL connections, the correct Line Voltage jumper is installed, there is proper voltage on the High Voltage POWER connections and the motor is not operating, replace the motor.