AMX Troubleshooting & Technical Support
Results Count
Error Number
Unit Appears “Dead” (No Display) - Battery Voltage OK - +24 Volt Output Missing
Error Code System Message
Question
How do I troubleshoot this AMX-4 Series issue: Unit Appears “Dead” (No Display) - Battery Voltage OK - +24 Volt Output Missing?
Short Answer
Bad Hand-Switch (New Style) - Remove J8 On CPU (Controller Board) To Verify +24 Volt Supply Returns
Possible Causes
Problem: Unit Appears “Dead” (No Display) - Battery Voltage OK - +24 Volt Output Missing
Troubleshooting Steps
Bad Hand-Switch (New Style) - Remove J8 On CPU (Controller Board) To Verify +24 Volt Supply Returns
Parts Areas to Check
Battery
For Related Models
AMX-4, AMX-4+, Definium AMX 700
Error Number
Unit Resets Itself Under Load (while Driving, etc.)
Error Code System Message
Question
How do I troubleshoot this AMX-4 Series issue: Unit Resets Itself Under Load (while Driving, etc.)?
Short Answer
Usually Indicates Bad Battery Cell(s) Or Loose Battery Terminal Connections
Possible Causes
Problem: Unit Resets Itself Under Load (while Driving, etc.)
Troubleshooting Steps
Usually Indicates Bad Battery Cell(s) Or Loose Battery Terminal Connections
Parts Areas to Check
Battery
For Related Models
AMX-4, AMX-4+, Definium AMX 700
Error Number
Unit does not charge (no voltage across sense resistor A3R1)
Error Code System Message
Question
How do I troubleshoot this AMX-4 Series issue: Unit does not charge (no voltage across sense resistor A3R1)?
Short Answer
Verify Safety Contactor Contacts are not welded shut. Replace as required.
Possible Causes
Problem: Unit does not charge (no voltage across sense resistor A3R1)
Troubleshooting Steps
Verify Safety Contactor Contacts are not welded shut. Replace as required.
Parts Areas to Check
Safety Contactor
For Related Models
AMX-4, AMX-4+, Definium AMX 700
Error Number
Unit fails startup self-test
Error Code System Message
TEST 00-07
Question
What does the AMX-Series power-up diagnostic check?
Short Answer
The startup diagnostic verifies the microcontroller, EPROM checksum, non-volatile RAM battery, external RAM, calibration checksum, watchdog timer, programmable interval timer, and A/D converter/power-supply circuitry.
Possible Causes
Failure of one of the startup hardware or firmware integrity tests.
Troubleshooting Steps
Observe the TEST number shown during power-up. Use TEST 00 through TEST 07 to isolate the failing subsystem, then follow the matching power-up error-code action.
Parts Areas to Check
CPU board; RAM; EPROM; timers; A/D converter; power supplies
For Related Models
AMX-4, AMX-4+, Definium AMX 700
Error Number
Unit will not drive normally
Error Code System Message
ERROR 12/13/19/210-218
Question
How do I troubleshoot an AMX-Series drive-control problem?
Short Answer
Use the run-time drive display to compare left/right drive command and feedback while observing handle displacement and safety interlocks.
Possible Causes
Handle calibration or Hall-sensor issue; feedback mismatch; drive-control board; relay/fuse/interlock fault.
Troubleshooting Steps
Check handle calibration, command versus feedback values, tube-park/bumper/drive-enable inputs, drive fuses and motor relays. Use the specific application error code when present.
Parts Areas to Check
Drive handle; Hall sensors; drive control board; motor relays; drive fuses