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Re: Code H4 comes up when the sharp copier ar-5316 is...
Hello sir; H4 code require reset procedure as follow;
1, press"#" "interupt" "c" "interupt" these 4 keys.
2, enter 14 , then press start
3, turn power off and back on .
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H4 normally is the problem with the fuse unit caused by thermistors or therm-state charge them then clean it by sim 14 but first check if the connector and fame then do sim 5-02 to check the lamp status
H4 indicates "low temperature", possibly caused by a failure of the heater lamp or fuser. Sometimes this error is shown without an actual damage when the power cord is pulled without shutting down the copier first.
To cancel the error code, press [CLEAR], [AUTO], [CLEAR], [AUTO] in rapid succession. The display should go blank. Next, select 14 (clear low temperature code), press [START]. Finally, switch off and on the machine.
If there was no actual damage (i.e. power cord pulled), the machine should be OK again. If the error persists, immediately or after short time of operation, you will need to contact Sharp technical service for repair.
Reset the error by pressing [#] [interupt] [ C] [interupt] [1] [4] [start]
If the problem persists check the heater lamp and the thermostat by ohm meter
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