MASTER MLS™ 2500, 2503, 3500, 3503, MASTERTIG MLS™ 3000, 3003, 4000, 4003 / 0606– 17© KEMPPI OY
3.2.7. Foot pedal control R11F
First read under ”3.2.2.4. TIG welding panel MTL” point ”6. Remote control” for installing the
remote control ready for operation. Foot pedal R11F is used in TIG welding, and its control range
is adjustable. The minimum value of control range is set with the panel potentiometer when the
pedal is not pressed, display shows ”LO”. Control range maximum is set similarly by pressing
first the PEDAL LO/HI button on the panel, display shows ”HI”. Welding is started with a light
press on the pedal, the arc ignites to the set minimum current. Welding current goes to maximum
when the pedal is pressed to the bottom. The arc is broken when the pedal is released. Adjust again
if necessary.
3.3. COOLING UNIT OPERATION
(MASTERCOOL 10, MASTERCOOL 12)
The operation of cooling units Mastercool 10 and Mastercool 12 is controlled by the power
source. The cooling unit pump starts automatically when welding starts. Proceed as follows:
1. Start power source.
2. Check water level and input flow of the reservoir, add liquid if needed.
3. If you use a water-cooled torch you can fill it with water by pressing WATER FILL
(HF CONTACT) button for more than 2 seconds.
The pump operates for 5 another minutes after welding has been finished to cool the water to the
same temperature as in the machine surrounds. This reduces the need of service.
Thermal overload
The thermal overload light is lit, the machine stops and display shows COOLER when temperature
control of the machine has detected cooling water overheating. The cooling unit fan cools down
the water, and when the light goes out welding can be started again.
Water flow signal
Display shows COOLER when water flow is blocked.
3.4. STORAGE
The machine must be stored in a clean and dry room. Protect the machine from rain and direct
sunshine in places where temperature exceeds +25 °C.
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