B-2
OPERATION
COOL ARC
®
22
CONTROLS AND OPERATIONAL FEATURES
FIGURE 2
1. Power Indicator Light:
This lamp will illuminate when the
pump and internal fan are on. The light does not indicate the
Cool Arc
®
22 is being supplied by the power source.
2. Flow Sensor Switch:
The Cool Arc
®
22 comes equipped with
a flow sensor that triggers an error code to the machine to
protect the TIG Torch from over-heating when inadequate
coolant flow is detected through the flow sensor. The Error
Code fault (Error 11) could indicate a possible kink in the
torch lines, damage and/or a leak in the TIG Torch coolant
lines, or signal the need to use a TIG Torch that is of a higher
amperage capacity and rating. The flow sensor can be turned
off ‘O’ or on ‘I’. The default position is on when first powered
on out of the box. When in ‘O’ off position, the flow sensor is
inactive: in this condition the missing coolant flow is not
detected.
A flow sensor is incorporated to detect low coolant flow. A
low or no flow condition will disable the welding output to
protect the torch.
3. Reservoir for Coolant with Cap:
The translucent reservoir
enables control of volume of the coolant. A tank filter to catch
400um dust material is located in opening tank. See
Maintenance section for more details.
4. Quick Connect Coupling Outlet:
Supplies cool coolant to the
torch/gun.
5. Quick Connect Coupling Inlet:
Takes warm coolant from
torch/gun.
6. Minimum and Maximum Liquid Level:
The minimum
recommended liquid level is 0.4 gallons.
FIGURE 3
7. Power Lead with 9-pin connector.
Table below indicates the
Pin-out and description:
8. Fuse Receptacle:
A 2A fuse is present to protect the motor
pump.
9. Removable Strainer.
The pump is equipped with a 150um
strainer: an external cover is supplied to protect the
accessible strainer. See Maintenance section for more
details.
Moving parts can injure. Never place fingers or tools into
the louvers of the cooler.
1
2
3
4
5
6
WARNING
Pin # Signal name
Description
1
COM
Reference
2
+15V/1
Aux power supply
3
Coolant Error
Coolant flow error
4
Presence
To indicate to Power generator
CA22 is active
5
NC
Not used
6
VBUS
Power supply 390Vdc
7
NC
Not used
8
ON_OFF
To enable pump and cooling
9
EARTH
Earth ground
WARNING
9
8
7
