OWNERS MANUAL 18
H: (Hot) Motor is too hot. Analog memory is charged with voltage which is proportional to the
current motors are using. When the current is too high too long time it is supposed that
motors are too hot and to prevent motors to be destroyed the current is turned off.
8: (All leds are on) Processor is in reset - state.
0: Blinking (Zero) Safety switch is pressed. This is actually no Error-code, but means, that
microcontroller is not working correctly. At the same time buzzer is usually on.
A: (Accumulator) when charge of accus is decreased to a low level (and foot control is on)
display is showing "A" (this "A" may sometimes occur also when noise is partly destroying
the signal so that microcontroller "misunderstands" battery information).
Messages why movement is stopped
If chairs movement is stopped before the chair has reached wanted position, to the display comes
the reason for the stop. Always when motor is stopping there comes a code of the reason for the
stop. If the movement was all right the code is not showed. One thing to notice is that if noise is
disturbing foot controllers signal, microcontrol can't say if command was interrupted or not. So
there will be not any code to show, though movement stop was not natural.
Messages when driving manually
When driving a chair manually only one motor at a time is moving. Used codes for exceptional
stops of movements are as follows:
5: Software current limit microprocessor stops supply of current to the motor
6: Hardware current limit electronics stops supply of current to the motor
7: Lower limit, the chair has reach the minimum level (soft limit)
8. Upper limit; the chair has reach the maximum level (soft limit)
9: No movement; the value of potentiometer doesn't change (automatic)
Messages when driving automatically
If one or both movements are stopped exceptionally, so that the chair doesn't
reach the programmed position, the reason for that is showed in following
formula: 1X2Y: where X and Y are replaced by a reason code 5 - 9. If there is no
problem the code is 0.
Example: into the display comes following code 1025.
This means, that lifting motor has reached the programmed position (1 for lifting motor, 0 for OK),
but backrest motor has been stopped by the processor, because the current was too high (2 for
backrest motor, 5 for software current limit downwards). Reason for the error could be a mechanical
obstacle under the backrest.
If the automatic movement is stopped by a new command, code F comes to the display.
8 A
9 A
16 A
7 A
1 = Liftmotor
2 = Tiltmotor
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