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High operating noise level
Cause: Coolant level too low
Remedy: Top up coolant
Cause: Coolant pump defective
Remedy: Contact After-Sales Service
no l H2O
The cooling unit flow sensor has tripped. The error message appears on the power source
control panel.
Cause: Coolant flow problem
Remedy: Check coolant level, cleanliness and proper return;
change coolant if necessary
Cause: Coolant filter displaced when connecting coolant return
Remedy: Clean coolant filter using clean tap water or change filter element
hot l H2O
The cooling unit thermostat has tripped. The error message appears on the power source
control panel.
Cause: The coolant temperature is too high
Remedy: Wait until the end of the cooling phase, i.e. until "hot | H2O" is no longer dis-
played.
If using a ROB 5000 or field bus coupler for robot control: Before resuming
welding, set the "Source error reset" signal.
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