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Troubleshooting AMX

Error Number
Error 321
Error Code / System Message
321
Error Question
What should I check for error 321 on the AMX-4 Series?
Short Answer
1) Check Items 1 and 3 from Error 320 2) Check for 27 VAC at J4-6 & 7 on Rotor Control Board 3) Check for 60 Hz Inverter signal OK signal at J1-5 on the Rotor Control Board 4) If Error 320 occurs after Error 321, there may be a temperature problem on the 60 Hz Inverter
Possible Causes
1) Check Items 1 and 3 from Error 320 2) Check for 27 VAC at J4-6 & 7 on Rotor Control Board 3) Check for 60 Hz Inverter signal OK signal at J1-5 on the Rotor Control Board 4) If Error 320 occurs after Error 321, there may be a temperature problem on the 60 Hz Inverter
Troubleshooting Steps
1) Check Items 1 and 3 from Error 320 2) Check for 27 VAC at J4-6 & 7 on Rotor Control Board 3) Check for 60 Hz Inverter signal OK signal at J1-5 on the Rotor Control Board 4) If Error 320 occurs after Error 321, there may be a temperature problem on the 60 Hz Inverter
Parts Areas to Check
Rotor Control Board; Rotor
For Related Models
AMX-4, AMX-4+, Definium AMX 700
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