Error Code [Chek] [Inpt]

Input voltage is either too high or too low for the unit to operate properly.

? What Causes This

Improper input power connections, malfunction in AC power supply.

✓ How to Fix It

Check and verify all input power connections. Ensure correct input voltage levels are maintained by consulting Section 5-15 of the manual if necessary.

Source: page 69 of the official manual

From the manual

Manual page 69 — Miller error [Chek] [Inpt]

This error code appears in:

Miller Dynasty 400