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PR-2000
2.3 Safety devices
2.3.1 Cooling
Figure 2.1
Figure 2.3
2.3.2 Overheat protection
Figure 2.4
Copyright © Pro Spot International, Inc. 2005-2009
When the Spot Gun is used continuously, the welding cables and the power trans-
former get hot. To prevent the welder from malfunctioning due to overheating, it is
cooled using the built-in air system.
PR-2000 features an air cooling system that cools all four welding cables.There
are two different Cooling Modes: "AUTO" (default) and "MANUAL". In the "AUTO"
mode, the air cooling system turns on automatically after 15-30 welds and forced
air starts to flow through the cable. In the "MANUAL" mode the cooling system
operates continuously.
To switch to "MANUAL" mode:
1) Restart the software and press "HELP" button while start-up screen is dis-
Figure 2.2
played. "System Settings" screen will display (fig. 2.1).
2) Select "System Settings" by pressing the Navigation button, Up (fig. 2.2).
3) Select "Manual Cooling" by pressing the Navigation button, Down (fig. 2.3).
AIR COOLING will activate.
The built-in overheat protection is designed to prevent damage to the welder
caused by overheating. The system will automatically shut off the welder when a
pre-programmed temperature is reached (fig.2.4). DO NOT turn off the welder! It
needs the cooling air to cool the machine faster. Wait until the display returns to
normal (usually 4-8 min.) Shorter duty cycles (due to short weld times and "rest"
periods between welds) will allow the cooling system to function better and may
prevent the auto-shut-off. (Consistently check weld strength by performing
destructuive tests).
IMPORTANT! Do not turn off the welder while the cooling system is
activated!
IMPORTANT! If the thermal breaker has switched off the welder,
please contact Pro Spot's authorized service personnel
2 Safety
Page 7
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