2165

Common Causes

• Faulty motor encoder
• Loose, damaged or contaminated encoder link cable or connector
• Defective inverter unit control board
• Encoder/parameter mismatch (e.g. multi-rotation detection range or communication version incompatible after an encoder or board swap)

Troubleshooting Steps

1. 1Read the code number shown with the alarm: code XX=0 = Error during reset; code XX=1 = Error during network address setting; code XX=2 = Error requesting basic communication information; code XX=3 = Error changing communication version; code XX=4 = Error acquiring device information; code XX=5 = Error during parameter change; code XX=6 = Error at AT (auto) mode start; code YY=0 = Communication error; ZZZZ shows encoder link error status C2ERR
2. 2Record the full XXYYZZZZ code: XX is the link sequence step at failure (e.g. 2 = requesting basic communication info, 6 = AT mode start), YY is the error type, ZZZZ is supporting data.
3. 3YY=0, 1, 2 or 3 (communication error or transmit/receive timeouts): with power locked out, inspect and reseat the encoder link connectors at the motor encoder and inverter unit; check the cable for damage, sharp bends or coolant contamination.
4. 4YY=4 (abnormal response address): ZZZZ shows the responding device's network address — check for a wiring mix-up or duplicate address on the encoder link.
5. 5YY=6 (parameter error): ZZZZ identifies the cause (1=missing parameters, 2=incompatible basic communication info, 3=multi-rotation detection range mismatch) — suspect an incorrect or incompatible replacement encoder or control board.
6. 6If cable and connectors check out, replace the motor encoder; only after that replace the inverter unit control board.