H2-01 I am trying to put a new fuser unit into a Sharp DX-C311. I get the following error code: H2-01

SOURCE: Sharp AR-M237 Error Code H4-21

-H4-21 means:Sub heater lamp abnormally low temperature detection. The setup temperature (about –25°C: Sim 43-1-1) is not reached within the specified time (about 32sec) from turning on the power ON SW. (When the temperature falls below 140°C in the standby mode.)
-Causes:
Sub heater thermistor defect
Sub heater lamp failure
Sub thermostat failure
Control PWB failure
-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.
When the lamp does not light: Check for disconnection of the heater lamp and thermostat. Check the interlock switch. Check the power PWB and the MCU PWB lamp control circuit.
Clear the display of self-diagnostics with SIM 14.
The H4 errors will not reset by themselves. You must enter service mode to reset this error even if the problem has been repaired. The reset process is outlined below (DO NOT USE ANY OTHER FUNCTIONS IN SERVICE MODE):
Press the following sequence: "#/P" "*" "C" "*"
Type in 1 4
Press start
hit 1 for yes
hit start
Unit should power off and the restart.
If the error code recurrs ther are other problems.

SOURCE: H2-00 Error Code, cant clear

Sounds like a tough one, take off the back cover and make sure all connectors are making good contact. You may have a fault in the main logic board.
This might need a tech to check out.
Hope that helps...

CheckitRight

• 1363 Answers
• Posted on Oct 20, 2008

SOURCE: H3 ERROR CODE SHARP AL 1631

H3:
00:TEMPERATURE OF FUSER UNIT HIGH,THERMISTOR CONTROL BOARD FAILING



Did you replace the thermistor? check the thermofuse also for continuity

SOURCE: SHARP AL-1644

To enter the serviceman simulation mode, press the keys as follows:
Clear → Density select → Clear→ Density select
To cancel the simulation mode, press the clear key. Then enter code 14 then hit start.

SOURCE: Sharp AL-1631 Fuser Unit

The fuser codes are only H2,H3 and H4. To reset , press C, Exposure, C, Exposure.Display goes off enter 14 press print.