Error code

Extech multimetre All models code C2220

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Meaning

Application calibration is corrupted

Signed-in members see the LED pattern and how to read the code with the remote control on eligible records.

Incompatible firmware or memory failure (B.U.D.S. should repair that)

Solution steps are not shared for faults that may be dangerous.

No do-it-yourself solution is given for this fault. For your safety, call an authorised service.

Get help from a technician over a video call.