ERROR MESSAGES
Various error messages will be displayed when there is a problem with the Hakko 472D
unit. If the following message is displayed, refer to “Trouble Shooting Guide”.
System Error
After the power has been turned on, the system
checks the memory and the programs. If an
abnormality is found,
will be displayed, and
all operations will be completely stopped.
Sensor Error
If there is a possibility of a failure in the sensor or
anywhere in the sensor circuit,
will be
displayed and power to the desoldering iron will be
cut off.
The sensor error also occurs if the cord assembly
is not properly connected.
Low temperature tolerance
(Flashing of the temperature display)
If power is present at the desoldering iron and the
nozzle temperature goes below the heater error
temperature tolerance setting, the temperature
display will flash. This indicates the possibility of a
heater malfunction.
EXAMPLE:
Assume the temperature setting is 400
°
C (750
°
F)
and the low temperature tolerance is 50
°
C
(100
°
F). If, even though the heater is receiving
power, the temperature of the desoldering iron
goes below 350
°
C (650
°
F) the display will begin to
flash indicating a possible heater malfunction.
EXAMPLE:
400
°
C – 50
°
C = 350
°
C (750
°
F – 100
°
F = 650
°
F)
→
The display will begin to flash.
NOTE:
If the temperature begins to rise again, the display will stop
flashing – even if the displayed temperature is below 350
°
C
(650
°
F).
BEFORE SERVICING ......
WARNING:
• Disconnect the power plug before servicing.
Failure to do so may result in electric shock.
• If the power cord is damaged, it must be replaced by the manufacturer, its authorised
service agent, or a similarly qualified technician to avoid hazard.
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