Cooling Unit Control; Adjusting The Cooling Unit Pressure Watch Limit - Kemppi KEMPOMIG 3200 Service Manual

Cooling unit control

The cooling unit is controlled on only on MIG process, while start is active. Cooling unit stops
the power stage if a missing coolnat pressure is detected or the coolant has overheated.
A001

Adjusting the cooling unit pressure watch limit

(Kempomig 3200W/4000W)
If the missing coolant pressure signal lamp (17) is lit, though coolant circulates normally, then
The pressure watch limit can be adjusted as follows:
1. Run the pump by the test switch
2. Adjust the pressure switch adj. Screw counter-clockwise, until the warning lamp goes out.
3. Check the operation with a test weld
*
Connector Signal
X7/1
X7/2
X7/3
X7/4
A002
Cooling unit start (in start the power source control card A001
pulls down the voltage on connector X7/1)
Supply voltage to control card A002 electronics (+ 24 V)
GND
Stop, if coolant pressure is less than 1 bar or the coolant
temperature rises above + 60° C, then the control card A002
pulls down the voltage on connector X7/4, which shuts the
power source down.
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