Description: Fusing low temperature error
A fusing temperature of lower than 100°C is detected for 1 second by the fusing thermistor during operation or stand-by mode.
Causes: • Fusing lamp open • Fusing thermistor defective • Power supply board defective • Fusing thermistor open • Fusing thermostat open
Code: 546
Description: Unstable fusing temperature
The fusing temperature does not rise 3 °C or more within 5 seconds after the fusing lamp has been on over 8 seconds.
Causes: • Thermistor defective • Power supply unit defective
Code: 547
Description: Zero cross signal malfunction
Zero cross signals are not detected within 5 seconds after the main power switch is turned on, or are not detected within 1 second after operation begins.