Quick Check

A humming converter that won't start usually means:

• Low voltage - Wire may be too small or the run is too long
• Weak service - Your electrical service may not be strong enough
• Starting under load - Make sure all equipment is OFF before starting (including transformers)
• Loose connections - Check that all wire connections are good and tight

Quick Check

Strange noises or vibration can be caused by:

• Fused contactor - The two pole contactor may be fused together
• Voltage drop - Your single phase line voltage may be dropping
• Wiring issue - The motor may be connected wrong

Watch this video to see how to check:

When does the breaker trip?

Instant Trip - Quick Check

If the breaker trips instantly, either:

• Breaker is too small - Converter needs a larger breaker for startup surge
• Wrong breaker type - Not rated for motor load (needs overload type breaker)
• Direct short - You have a direct short somewhere in the wiring

Delayed Trip - Quick Check

If the breaker trips after a second or more:

• Check motor connections - Make sure the motor is connected properly
• Do not use wire nuts - Use proper terminal connections instead
• Check your voltage - See if single phase line is dropping below 215 volts

Watch this video to see how to check:

Installation Resources

Have you checked our installation guides?

• Step-by-step installation guide
• Wiring diagrams
• Sizing calculator