Code :

Code: 545
Description: Heating roller fusing lamp consecutive full power 1 When the fusing unit is not running in the ready condition, the heating roller fusing lamp keeps on full power for 30 seconds.
Causes: • Broken heating roller thermostat • Broken heating roller fusing lamp
Remedy: 1. Replace the heating roller thermostat. 2. Replace the heating roller fusing lamp.

Code: 547-01
Description: Zero cross error (Fusing relay short) • The zero cross signal is detected three times even though the heater relay is off when turning on the main power. • The zero cross signal is not detected for 3 seconds even though the heater relay is on after turning on the main power or closing the front door. • The detection error occurs twice or more in the 11 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.
Causes: • Defective fusing lamp relay • Defective fusing lamp relay circuit
Remedy: 1. Replace the PSU. 2. Replace the BCU.

Code: 547-02
Description: Zero cross error (Fusing relay open) • The zero cross signal is detected three times even though the heater relay is off when turning on the main power. • The zero cross signal is not detected for 2 seconds even though the heater relay is on after turning on the main power or closing the front door. • The detection error occurs twice or more in the 11 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.
Causes: • Defective fusing lamp relay • Defective fusing lamp relay circuit • Short 24VS fuse
Remedy: 1. Replace the 24VS fuse (FU3/FU4). 2. Replace the PSU. 3. Replace the BCU.

Code: 547-03
Description: Zero cross error • The zero cross signal is detected three times even though the heater relay is off when turning on the main power. • The zero cross signal is not detected for 2 seconds even though the heater relay is on after turning on the main power or closing the front door. • The detection error occurs twice or more in the 11 zero cross signal detections
Causes: • Unstable power supply
Remedy: • Check the power supply source.

Code: 551
Description: Heating roller thermistor (end) error 2 The temperature measured by the heating roller thermistor (end) does not reach 0°C for 6 seconds.
Causes: • Loose connection of heating roller thermistor (end) • Defective heating roller thermistor (end)
Remedy: 1. Check that the heating roller thermistor (end) is firmly connected. 2. Replace the heating roller thermistor (end).

Code: 552
Description: Heating roller warm-up error 2 The heating roller temperature does not reach the ready temperature while 70 seconds after the heating lamp on.
Causes: • Dirty or defective thermistor (end) • Heating roller fusing lamp broken • Defected thermostat • Defective heating roller fusing lamp
Remedy: 1. Check if the heating roller thermistor (end) is firmly connected. 2. Replace the heating roller thermistor (end). 3. Replace the heating roller fusing lamp.

Code: 553
Description: Heating roller fusing lamp overheat 2 (software error) The detected pressure roller temperature stays at 230°C or more for 1 second.
Causes: • Defective PSU • Defective BCU
Remedy: 1. Replace the heating roller thermistor (end). 2. Replace the PSU. 3. Replace the BCU.

Code: 554
Description: Heating roller fusing lamp overheat 2 (hardware error) The heating roller thermistor (end) detects 250°C or more.
Causes: • Defective heating roller thermistor (end) • Defective PSU • Defective BCU • Defective fusing control system
Remedy: 1. Replace the heating roller thermistor (end). 2. Replace the PSU. 3. Replace the BCU.