PHbd
Phase Unbalance
Schneider Electric · Altistart 22 Soft Starter
What does PHbd mean?
A significant unbalance in the line voltages or currents across the three phases has been detected. This condition can cause excessive heating and stress on the motor and soft starter, leading to reduced lifespan and premature failure.
Complete Troubleshooting Guide
- 1
Measure and check the line voltage across all three phases for consistency.
- 2
Verify the 'Ubd' (Voltage Unbalance detection threshold) and 'Ubt' (Voltage Unbalance time delay) parameters in the 'PrO' menu (page 57) are set appropriately for your power supply quality.