MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 28/71
STATUS LED
Indication temperature controller.
LED Off:
TEC-Controller is disabled. ENABLE not active.
LED On:
TEC-Controller is enabled
AND
temperature is /- 1 °C of the setpoint value
LED one flash:
TEC-Controller is enabled
AND
temperature is below setpoint (too cold).
LED two flashes:
TEC-Controller is enabled
AND
temperature is above setpoint (too hot).
CPU LED
After power up and the booting sequence, this LED is blinking periodically,
indicating the processor is working properly. The TEC-Controller is operating
normally.
Note: If this LED shows different behavior, the TEC-Controller is not
operating normally. Do NOT enable the TEC-Controller in this case.
6.1.2. Booting sequence
After power up the processor runs through a booting sequence. During this se-
quence, the internal and external hardware is entirely configured and put into
full operation.
This sequence is accompanied by a LED test sequence, which behaves like a
traffic light. These LEDs are switched on and off sequentially:
1
st
:
RED
2
nd
:
YELLOW
3
rd
:
GREEN
After this sequence, the TEC-Controller is in normal operation.