11
12. ERROR MESSAGES
The HAKKO 937 displays various error messages whenever there is a problem. If the
following messages are displayed, refer to the Troubleshooting Guide on page 12.
System error
When the power is turned on, the system automatically
checks its memory and the stored programmed. If a
problem is found, the unit will display
and all
operations will come to a complete stop.
If there is a possibility of a failure of the sensor or any
part of the sensor circuit,
will be displayed and
power to the soldering iron will be cut off.
If power is being sent to the soldering iron and the tip
temperature goes below the heater-error temperature
tolerance setting, the temperature display will begin
flashing on and off. This indicates a possible heater
malfunction.
For example, assume that the temperature setting is
400
°
C (750
°
F) and the heater-error temperature
tolerance value is 50
°
C (100
°
F). If the temperature of the
soldering iron goes below 350
°
C (650
°
F), even though
the heater is receiving power, the display will begin
flashing, indicating a possible heater malfunction.
Example: 400 - 50 = 350
°
C (750 - 100 = 650
°
F)
The display begins flashing.
Note:
If the temperature begins to rise again, the
display will stop flashing, even if the
displayed temperature is below 350
°
C
(650
°
F).
Sensor error
Heater error