Kyocera KM1820

Error Code:

Code: C6400
Description: Zero-crossing signal problem
• The engine PWB does not detect the zero-crossing signal for the time specified below. At power-on: 3 s Others: 5 s
Causes: Poor contact in the connector terminals. Defective power supply PWB. Defective engine PWB.
Remedy: Check the connection of connectors YC7 on the engine PWB and YC2 on the power supply PWB, and the continuity across the connector terminals. Repair or replace if necessary. Check if the zero-crossing signal is output from YC2-11 on the power supply PWB. If not, replace the power supply PWB. Replace the engine PWB if C6400 is detected while YC2-11 on the power supply PWB outputs the zero-crossing signal.

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