Description: Zero cross signal malfunction Zero cross signals are not detected within 5 seconds.
Causes: • Power supply board defective • Poor mains power supply condition
Code: 610
Description: Communication error - duplex unit The engine board cannot communicate with the duplex unit.
Causes: • Poor connection between engine board and duplex unit • Engine board defective • Duplex control board defective
Code: 640
Description: Engine to controller communication error.
Causes: • Check the connection between the controller and the engine board. • Replace the engine board if the error is frequent. • Replace the controller if the error is frequent.
Code: 641
Description: Engine to controller communication error (no answer).
Causes: • Check the connection between the controller and the engine board. • Replace the engine board if the error is frequent.
Code: 650
Description: Communication error - GAVD • The engine board detects an unknown device on the I2C I/F bus (internal bus on the engine control board). • The engine board detects an I2C I/F bus error.
Causes: • Engine board defective
Code: 651
Description: Communication error - FCI • The engine board detects an unknown device on the I2C I/F bus (internal bus on the engine control board). • The engine board detects an I2C I/F bus error.