Miele T9800HRT service manual Led, Description

LED	Reference	Description
	Designator
STATUS	LED 1	Auxiliary Status LED
	LED 2	Auxiliary Status LED
	LED 3	Auxiliary Status LED
	LED 4	Auxiliary Status LED/Digital to Analog Output.
	LED 5	Main Status/Error LED.
AC	LED 6	Indicates if the DC Buss is Energized (Voltage Present).
+VCON	LED 7	Indicates if Console Voltage Supply is present.
VDSP	LED 8	Indicates if the DSP Power Supply is present.
DOWN	LED 9	Indicates if the upper console is commanding Elevation
		DOWN.
UP	LED 10	Indicates if the upper console is commanding Elevation UP.
PWM	LED 11	Indicates if Console is commanding speed.
SPEED	LED 12	Indicates the motor is moving via the encoder's feedback by
		blinking.

NORMAL OPERATION

1.LEDs 1, 2 and 3 Sequence back and forth to indicate the processor is on-line and operational.

2.LED 4 is used as a discrete/analog signal to the upper console.

3.LED 5 indicates system status/mode. Currently 3 modes are defined safe mode, stand-by mode and run mode. They are defined as follows:

a)Safe Mode - When the controllers safety relay is not energized and no error exists, LED 5 remains off.

b)Stand-by Mode - When the safety relay is engaged but the system is not outputting an active PWM to the motor and no error exists, LED 5 blinks off and on at a fast rate.

c)Run Mode - When the system outputs an active PWM Control signal to the

motor and no error exists, LED 5 remains ON.29