Control Power Supply Voltage Decrease (PSM, PSMR) / Inverter Overheat

What does 6 mean?

This code indicates one of two distinct issues depending on the equipment type. For PSM or PSMR units, it signifies a decrease in the control power supply voltage, which can disrupt the unit's operation. For Inverter units, it indicates an overheat condition that can be caused by various environmental or operational factors, potentially leading to equipment damage or shutdown.

• Input voltage decrease to the PSM/PSMR power supply unit
• Motor operating at or above its continuous rating (for Inverter units)
• Insufficient cooling capacity within the cabinet, such as clogged filters or non-functional fans (for Inverter units)
• Ambient temperature exceeding the specified operating limits (for Inverter units)
• The control printed-circuit board faceplate not being fully seated (for Inverter units)

1. 1

   Check the power supply input voltage level to the PSM/PSMR unit

2. 2

   Verify the motor's operating current for Inverter units is at or below its continuous rating

3. 3

   Inspect and clean cooling fans and filters within the cabinet for Inverter units to ensure adequate cooling capacity

4. 4

   Measure the ambient temperature where the Inverter unit is installed to ensure it is within specified limits

5. 5

   Ensure the faceplate (control printed-circuit board) of the Inverter unit is pushed in as far as it will go

6. 6

   Replace the SVM unit (for Inverter issues) if other troubleshooting steps do not resolve the overheat condition