11 CHAIR SIGNAL TONES
24 Planmeca Chair User’s manual
11.1.3 Group 3 - Error codes with three beeps every two seconds
If the error tone is continuous (over ten seconds), the
voltage signal received from the backrest motor position
sensor is below (short circuit) or above (open circuit) the
programmed limits. Either the backrest motor position
sensor is out of calibration or the sensor and/or its cable is
broken.
If the error tone disappears after ten seconds, the voltage
signal received from the backrest motor position sensor is
within the programmed limits, but it does not change or
changes in the wrong direction when the motor is run.
Either the backrest motor position sensor is not in contact
with the motor’s worm screw or the processor PCB is
broken.
11.1.4 Group 4 - Error codes with four beeps every two seconds
The lift or backrest motor runs without a command from
the foot control or control panel. The processor PCB is
broken.
Table 2: Error codes with two beeps every two seconds
Code Name Description
3 ERROR_LIFT_POT_MISSING Lift position sensor is missing.
4 ERROR_LIFT_POT_OUT_OF_CAL Lift position sensor is out of calibration.
5 ERROR_LIFT_DOES_NOT_MOVE Lift motor does not move or it moves to wrong
direction.
Table 3: Error codes with three beeps every two seconds
Code Name Description
6 ERROR_BACKREST_POT_MISSING Backrest position sensor is missing.
7 ERROR_BACKREST_POT_OUT_OF_CAL Backrest position sensor is out of calibration.
8 ERROR_BACKREST_DOES_NOT_MOVE Backrest motor does not move or it moves to
wrong direction.
Table 4: Error codes with four beeps every two seconds
Code Name Description
9 ERROR_LIFT_MOVES_WITHOUT_CMD Lift motor moves without command.
10 ERROR_BACKREST_MOVES_
WITHOUT_CMD
Backrest motor runs without command.
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