• Code: 542
• Description: Fusing temperature warm-up error The fusing temperature does not reach more than 80 °C 17.5 seconds after the main switch is turned on.
• Causes: • Thermistor defective • Fusing lamp open • Fusing thermostat open • Power supply board Defective • Defective connection of the fusing unit

• Code: 543
• Description: Fusing overheat error A fusing temperature of over 245 °C is detected for 1 second by the fusing thermistor. A fusing temperature of over 235 °C is detected for 1 second after the fusing lamp has been turned off. The dual monitoring circuitry of the BICU detects extremely high temperature and tripped the relay circuit off.
• Causes: • Fusing thermistor defective • Power supply board defective

• Code: 545
• Description: Fusing lamp stays on The fusing lamp stays on more than 12 seconds after the main motor has been turned off.
• Causes: • Fusing thermistor defective • Power supply board defective • Defective connection of the fusing unit

• Code: 546
• Description: Unstable fusing temperature During standby, within 500 ms, the fusing temperature goes below 60 °C twice or over 60 °C three times. Within 1 minute, a 60 °C increase or decrease in fusing temperature is detected during five different one-second intervals.
• Causes: • Fusing thermistor defective • Power supply board defective • Defective connection of the fusing unit

• Code: 547
• Description: Zero cross signal malfunction Zero cross signals are not detected within 5 seconds.
• Causes: • Power supply board defective • Defective mains power supply condition

• Code: 590
• Description: G112/ G113 Only Fusing fan motor error The CPU detects an exhaust fan lock signal for more than 3.5 seconds. The engine board cannot communicate with the duplex unit.
• Causes: • Poor connection of the exhaust fan motor • Too much load on the motor drive

• Code: 640
• Description: Engine to controller communication error.
• Causes: • Examine 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: • Examine the connection between the controller and the engine board. • Replace the engine board if the error is frequent.