Tweco 300Pi Transtig Welding Inverter - Manual (Page 27)

TRANSTIG 300Pi
Manual 0-5309 3-9 INSTALLATION, OPERATION AND SETUP
18. Fan on Demand
The Transtig 300Pi is fitted with a fan on demand feature. Fan on demand automatically switches the cooling
fan off when it is not required. This has two main advantages; (1) to minimize power consumption, and
(2) to minimize the amount of contaminants such as dust that are drawn into the power source.
Note that the fan will only operate when required for cooling purposes and will automatically switch off
when not required.
19. Water Cooler Remote Control Socket
The 4 pin Water Cooler Remote Control Socket is used to connect remote control devices to the welding
power source. To make connections, align keyway, insert plug, and rotate threaded collar fully clockwise.
A-12101
Figure 3-5: 4 Pin Water Cooler Remote Control Socket
Socket Pin Pin Function
1 Water Cooler ON control relay contact
2 Water Cooler ON control relay contact and Control circuit common
3 Temperature / Flow fault
4 Connected to terminal 2
Table 3-2
The connection between pin 2 and pin 4 indicates to the Power Source that a water cooler is connected.
If this connection is not present, the Power Source water cooler relay output and the water cooler fault
signal will be inhibited.