Planmeca Compact I, Техническое руководство

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Chapter D - HELP & ERROR MESSAGES
D-20 Planmeca Compact i
DETAILED DESCRIPTION OF ERROR MESSAGES
Technical Manual
3.10 Patient Chair related
E 64 Seat position potentiometer or its cable is faulty or
disconnected
This error occurs if the output signal from the position potentiometer wiper is close to 0V. This
indicates that the cable is disconnected or the wiper or the hot end of the pot is open-circuited
(cable or pot fault).
E 65 Lift motor does not run or no signal from the position
sensing potentiometer
There can be several reasons for this error, but they can easily be divided into 3 categories to
be more easily understood;
a) If the motor runs and the chair’s lift mechanism moves:
The error must be in the pot, its cable or on the MCB. Check visually the condition of the pot.
If the pot’s axle is rotating together with the worm screw then check the cable from the pot all
the way to the MCB. Turn off the power and use and ohmmeter to do the checking. If the pot
and its cable seems to be ok you can additionally check the reading from the pot with the help
of the service mode 76 that shows the pot signal on the unit display. Connect an external pot
directly to the MCB and use the service mode to check that the MCB is OK.
b) The motor does not run but there is a faint humming sound from the motor.
Check that the movement has not reached either of the mechanical limits. Is the seat over-
loaded (>150 kg load)? Is there any other mechanical obstruction? Check that the motor
capacitor is properly connected and that the capacitor is OK. Check that the motor cable is
OK (you should be able to measure the resistance of both windings at the connector that con-
nects to the MCB).
c) The motor is completely dead.
Is the motor very hot? It is possible to overheat the motor if you run it continuously for more
than about 2 minutes, or if the motor runs more that 13% of the time. When the motor heats
up the built in over-temperature switch disconnects the common wire, resulting in a temporar-
ily dead motor. When the motor cools down (this can take 10...20 min.) it returns back to nor-
mal operation. Check also the connector and cables to the motor if it is not overheated but still
dead.
E 66 Lift motor or its position pot cable has a wrong connection
This error can occur only if you install a new motor or pot and either of these have a cable
with crossed conductors. In other words, the pot signal (or motor running direction) is oppo-
site to what it should be. Check that the cable(s) are according to the drawings.
This error could occur also if the motor direction relay on the MCB has failed. Check that the
direction re-lay is toggling when trying to alternatively drive the mechanism in both directions.
E 67 Backrest position potentiometer or its cable is faulty or
disconnected
Please refer to the explanation for the lift motor (ER64), since both motor drives are equal.
E 68 Backrest motor does not run or no signal from the position
sensing potentiometer
Please refer to the explanation for the lift motor (ER65), since both motor systems are equal.