///Drive (VFD) fault or phase loss
Start, power & alarms

Drive (VFD) fault or phase loss

Drive faults stop the pump to protect the motor.

Safety first: Switch off the pump, release all pressure (open the on/off valve or bleed-down valve) and lock out before you open any high-pressure part. Never put a hand or tool near a running jet.
1Check the causes, most likely first 0 of 2 checked
01Supply problem Most likely

A missing phase or low voltage.

How to check: Let an electrician check the supply.

PhotoArt. no.DescriptionReplaces OEMExcl. VAT
10640 Pressure switch, 60 PSI, 05142062
Gauge & sensorKMT
KMT 05142062 € 274.80
10641 Pressure switch, 30 PSI, 05140751
Gauge & sensorKMT
KMT 05140751 € 278.40
10691 Manometer 6000 PSI / 400 Bar
Gauge & sensorKMT, BFT, Flow, WSI
— € 76.80
10692 Manometer 80000 PSI / 5500 Bar
Gauge & sensorKMT, BFT, Flow, OMAX
— € 860.40
10782 Hyd. Pressure Gauge, 0-400 Bar, 05045497
Gauge & sensorKMT
KMT 05045497 € 114.00

02Overload from blocked orifice Possible

A blocked orifice overloads the motor.

How to check: Check the orifice.

Related problems

General advice based on manufacturer manuals and service practice. Always follow the manual of your machine. Not sure? .