S-E (sensor error) is displayed. - Causes and Troubleshooting for the problems in use of of the FM-2027/FM-2028

A station-type soldering iron does not work if S-E (sensor error) appears on the station LCD.

Hereunder is the causes and troubleshooting for the problems in use of the FM-2027/FM-2028.

Case 1. Tip is not inserted properly.

S-E (sensor error) occurs if the tip is not properly inserted all the way to the end.
Please insert the tip in the right procedure.

Tip insertion procedure

While the tip is hot, please use a heat resistant pad to prevent burns.

1. Hold the tip end and insert it into the sleeve assembly.

   

   Insert the tip until it clicks.

   

2. Align the locking parts of the sleeve assembly and the connector assembly, and insert the locking parts all the way.

The locking parts may not fit smoothly when the parts are brand new.

Hold and press down the locking part of the sleeve assembly, and insert it into the locking part of the connector assembly halfway.

• Make sure to insert it all the way to the end by holding the tip.

3. Confirm that the sleeve assembly and the connector assembly are attached firmly.

   If there is a gap, they are not connected correctly to each other. Please hold the tip and press it all the way to the end.

   

Case 2. A heating element innside the tip is disconnected.

The heating element inside the tip may disconnent due to degradation over time or drop impact.
Please check the tip resistance.

If the resistance value is abnormal, the heating element is disconnected. Please replace it with a new one.

If the measured value is normal, please make sure the tip is inserted properly. Tip insertion procedure

Tip resistance measurement procedure

Measure the resistance between A and B with a digital multi-meter.
The normal value is8Ω±10%.

Please measure the resistance at room temperature.

Case 3. A sleeve assembly or connector assembly is broken.

If the sleeve assembly or the connector assembly is broken, the contact between the pats may get loose and cause S-E (sensor error).
Please replace damaged parts.

Sleeve assembly

• Yellow  : Part No.B3216
• Orange : Part No.B3217
• Blue     : Part No.B3218
• Green   : Part No.B3219

Connector cover

• for FM-2027 : Part No.B3215
• for FM-2028 : Part No.B3220

 If there is any problem other than above mentioned or you cannot fix, please contact the store of purchase or the Hakko official distributor for solution.