top of page
Troubleshooting AMX
Error Number
Error 456
Error Code / System Message
456
Error Question
What should I check for error 456 on the AMX-4 Series?
Short Answer
1. Check Ribbon Cable From 1 KHZ Inverter Board to CPU Board 2. Troubleshoot The 1 KHZ Inverter Board—could be defective 3. Defective CPU Board 4. Bad Tap Relay(s) – Feedback
Possible Causes
1. Check Ribbon Cable From 1 KHZ Inverter Board to CPU Board 2. Troubleshoot The 1 KHZ Inverter Board—could be defective 3. Defective CPU Board 4. Bad Tap Relay(s) – Feedback
Troubleshooting Steps
1. Check Ribbon Cable From 1 KHZ Inverter Board to CPU Board 2. Troubleshoot The 1 KHZ Inverter Board—could be defective 3. Defective CPU Board 4. Bad Tap Relay(s) – Feedback
Parts Areas to Check
CPU Board; 1 kHz Inverter Board; Tap Relay
For Related Models
AMX-4, AMX-4+, Definium AMX 700
bottom of page