EWM M3.7X-O Operating Instructions Manual page 73

Error 20: Low coolant level
Category B
 Low f low rate.
Fill with coolant.

Check coolant flow - remove kinks in the hose package.

Adjust the flow threshold

Clean the cooler.

 Pump does not turn.
Turn the pump shaft.

 Air in the coolant circuit.
Vent the coolant circuit.

 The hose package is not filled with coolant.
Switch the machine off and on > pump running > filling process.

 Operation with a gas-cooled welding torch.
Deactivate the torch cooling.

Connect the coolant feed and return with a hose bridge.

Error 22: Excess coolant temperature
Category B
 Coolant is overheating
Allow the switched-on machine to cool.

 Fan is blocked, dirty or defective.
Check, clean or replace the fan.

 Air inlet or outlet is blocked.
Check the air inlet and outlet.

Error 23: Excess temperature of the HF choke
Category A
 External XF ignition unit is overheating.
Allow the switched-on machine to cool.

Error 24: Pilot arc ignition error
Category B
 The pilot arc cannot ignite.
Check the welding torch equipment.

Error 25: Forming gas error
Category B
 No gas.
Check the gas supply.

 The pre-pressure is too low.
Remove kinks in the hose package (nominal value: 4-6 bar pre-pressure).

Error 26: Excess pilot arc module temperature
Category A
 The power source is overheating.
Allow the switched-on machine to cool.

 Fan is blocked, dirty or defective.
Check the f an and clean or replace.

 Air inlet or outlet is blocked.
Check the air inlet and outlet.

099-5TLPXQ-EW501
15.12.2022
[1] .
[1] .
Rectifying faults
Error messages (power source)
73