Functional Check - JUMO mTRON T Operating Manual

4 Electrical connection
4.4

Functional check

Once the electrical connection is complete, the following points must be checked:
1) Voltage supply
2) LED function
3) Errors during initialization
Voltage supply
If
"Power" LED (green) is lit
"Power" LED is not lit
LED function
When the voltage supply is connected, the LEDs on the central processing unit are tested au-
tomatically.
If
The following LEDs light up in red simultane-
ously for approx. two seconds:
Status
BusError
Com1
Com2
One of the listed LEDs does not light up
After the test of the red LEDs, the following LEDs
light up in green simultaneously for approx. two
seconds:
Status
Com1
Com2
One of the listed LEDs does not light up
(If a voltage supply is present, the "Power" LED is permanently lit in green.)
32
Then
The central processing unit is supplied with volt-
age.
The central processing unit is not supplied with
voltage, or the electrical function of the LED is
faulty.
Remedy:
• Check voltage supply to "+24 V" and "GND"
terminals of the central processing unit.
• Check power supply unit and connection be-
tween power supply unit and central process-
ing unit.
If the "Power" LED does not light up, despite a
voltage supply being present, the central process-
ing unit must be replaced.
Then
The electrical function of the LEDs is in order.
The central processing unit must be replaced.
The electrical function of the LEDs is in order.
The central processing unit must be replaced.