Pins Correct Voltage
+5 and GND +4.90 to +5.20 V dc
+12 and GND +11.85 to +12.50 V dc
-12 and GND -11.85 to -12.50 V dc
Cooling Fan
Corrective Action:
Note: The maximum temperature for safe
operation of Haas CNC machines is 122 °F (50 °C).
The amplifier over temperature sensor will trigger at
195 °F (90 °C).
Make sure the cooling fan for the servo amplifiers
operates correctly.
If the fan does not operate correctly, measure the
voltage it receives. Disconnect the cable from the
cooling fan. Measure the voltage between the leads
of the cable. The correct voltage 120 VAC.
• If the cable has the correct voltage, the
cooling fan is defective.
Servo Amplifier - Troubleshooting Guide
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