How do I fix and clear Mazak alarm 304?

Check the high-pressure coolant unit. Check if the thermal relays of the electromagnetic switches in the unit control panel have tripped. If one is found to have tripped, press the RESET button of the tripped thermal relay. If the alarm is not released, contact the nearest Mazak Technical Center or Technology Center. Clearing procedure: Fix cause → press RESET.

ALARMSMazatrol Assistant

WARNINGAlarm code

304

HIGH PRESS. PUMP THERMAL TRIP

Q: What does Mazak alarm 304 mean?

Mazak alarm 304 is "HIGH PRESS. PUMP THERMAL TRIP". The thermal relays in the coolant unit of a machine of the high-pressure coolant specifications have tripped. Error type: Machine (PLC) — machine failure. Machine state: Feed hold — feed stopped, machine ready.

What it means

The thermal relays in the coolant unit of a machine of the high-pressure coolant specifications have tripped.

What to do

1Check the high-pressure coolant unit.
2Check if the thermal relays of the electromagnetic switches in the unit control panel have tripped.
3If one is found to have tripped, press the RESET button of the tripped thermal relay.
4If the alarm is not released, contact the nearest Mazak Technical Center or Technology Center.

Codebook — decoded

FError typeMachine (PLC) — machine failure

KStop statusFeed hold — feed stopped, machine ready

OClearingFix cause → press RESET

Still faulted after these steps? Do not restart under load — ask the Mazatrol assistant.

Still stuck? Ask the Mazatrol assistant →