TROUBLESHOOTING
WARNING
●
Before checking the inside of the Hakko 850D or replacing parts, be sure to
disconnect the power plug. Failure to do so may result in electric shock.
●
The unit does not operate
when the power switch is
turned ON.
CHECK
: Is the fuse blown?
ACTION
: Investigate why the fuse blew and then
replace the fuse. If the cause can not be
determined, replace the fuse. If the fuse
blows again, send the unit in for repair.
●
flashes, indicating a
sensor error.
CHECK
: Is the sensor broken?
ACTION
: See the procedure for checking a potentially
broken sensor.
●
flashes, indicating a
heater error.
CHECK
: Is the heater broken?
ACTION
: See the procedure for checking a potentially
broken heater.
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