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The FK 4000 Rob cooling unit has a thermostat option as standard.
- The thermostat option monitors the coolant temperature
- If the coolant temperature rises to above 70°C (185°F), the "hot | H2" indicator is au-
tomatically displayed and the welding current is interrupted. The cooling unit remains
operational
- The thermostat restores the welding current when the temperature falls to 65°C
(149°F).
Coolant filter The coolant filter is equipped with a CrNi screen; its function is to filter dirt particles above
100 micrometres in size from the coolant. This ensures that no coarse dirt particles can
pass into the coolant circuit. The coolant filter is fitted to the coolant return connection on
the cooling unit.
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