-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.
This will
help. Thanks please keep
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This helped, really, AR-M236 is working again and feels brand new.
THANK YOU VERY VERY MUCH
SOURCE: error code Sharp AR-M 257
The F2-04 error code you are getting is that you are using the wrong toner.It may be form sharp,but it toner chips is different.Only the chips swapping at the toner back can help you.
SOURCE: sharp AR-M236 Fault U2-40
Hello sir; This error code require reset the procedure as follow;
press "#/p" " . " "clear" " . " then enter 16 press start enter 0 press start again, press "clear all" machine will back to normal.
SOURCE: please i need to reset my sharp ar-m236 password
You can reset the nic card password by ressetting the nic card to factory defaults, custom setting, key operator, 00000 , print settings , network settings, reset the nic, default password is Sharp
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