MX-M260/M310/M260N/M310N SELF DIAG AND TROUBLE CODE 7 - 7
H2 00 Content Main heater lamp thermistor open hard
detection
Details Main heater lamp thermistor open
detection.
Fusing unit not installed.
Cause Main thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Fusing unit not installed.
Check
and
remedy
Check the harness and the connector of
the thermistor and the MCU.
01 Content Sub heater lamp thermistor open hard
detection
Details Fusing sub thermistor open detection.
Fusing unit not installed.
Cause Sub thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Fusing unit not installed.
Check
and
remedy
Check the harness and the connector of
the thermistor and the MCU.
H3 00 Content Main heater lamp abnormally high
temperature hard detection trouble
Details The fusing main heater thermistor causes
abnormally high temperature
Cause Main thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Check
and
remedy
Check the main heater lamp blinking with
SIM 5-2-1.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
01 Content Sub heater lamp abnormally high
temperature hard detection trouble
Details The fusing sub thermistor causes
abnormally high temperature
Cause Sub thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Check
and
remedy
Check the sub heater lamp blinking with
SIM 5-2-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
Trouble
code
Details of trouble
Main
code
Sub
code
H3 10 Content Main heater lamp abnormally high
temperature soft detection trouble
Details A/D value the fusing main thermistor
causes abnormally high temperature (over
230°C).
Cause Main heater lamp thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Check
and
remedy
Check the main heater lamp blinking with
SIM 5-2-1.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
11 Content Sub heater lamp abnormally high
temperature soft detection trouble
Details A/D value the fusing sub heater lamp
thermistor causes abnormally high
temperature (over 230°C).
Cause Sub heater lamp thermistor defect.
Control PWB failure.
Fusing section connector contact failure.
Check
and
remedy
Check the sub heater lamp blinking with
SIM 5-2-2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
H4 00 Content Main heater lamp abnormally low
temperature detection
Details The setup temperature (about 90°C) is not
reached within the specified time (about
17sec) from turning on the power.
When the temperature of main heater
lamp thermistor falls below 140°C in the
standby mode or printing.
When the temperature of main heater
lamp thermistor falls below 50°C in the
pre-heat mode.
Cause Main heater lamp thermistor defect
Main heater lamp failure
Main thermostat failure
Control PWB failure
Check
and
remedy
Check the heater lamp blinking with SIM 5-
2.
When the lamp blinks normally:
Check the thermistor and the harness.
Check the MCU PWB thermistor input
circuit.
If lamp lights and stays lit:
Check for disconnection of the heater lamp
and thermostat.
Check the interlock switch.
Check the power circuit and the lamp
control circuit on MCU PWB.
Clear the display of self-diagnostics with
SIM 14.
Trouble
code
Details of trouble
Main
code
Sub
code
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