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I purchased a UT with the communication function, but currently I'm not using the communication function. I haven't even wired communication, but the blinking SP decimal point of a communication error appears. Why is that?

I purchased a UT with the communication function, but currently I'm not using the communication function. I haven't even wired communication, but the blinking SP decimal point of a communication error appears. Why is that?

Check the operation mode and communication protocol.
If the operation mode is Remote (REM lights) and it's set to coordinated (PSL=CO-S), an error will occur if there is no wiring.

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