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The soldering tip does not get hot. Why?

Case1 "S-E" appears on the display.
Causes and countermeasures

"S-E" appears on the LCD.


Case2 "C-E" appears on the display.
Causes and countermeasures

"C-E" appears on the LCD.


Case3 Only the soldering iron number appears on the display.
Causes and countermeasures

Only the soldering iron number appears on the LCD.

Check the display after switching to the soldering iron number for the soldering iron that does not get hot. Only the soldering iron number appears as shown in the pictures above.


Case4 Nothing appears on the display.
Causes and countermeasures

Nothing appears on the LCD.


Case5 "---" appears on the display.
Causes and countermeasures

"---" appears on the LCD.