User Manual

CM2U8567E / 04.1999 VISONIK DCS Functions and System Messages VVS18 Siemens Building Technologies
3-106 System Messages --- DCS Messages Landis & Staefa Division
temperature > 65 GradC (ventilator down?)
DIAG TYP 00:00:00 NAME
temperature > 65 GradC (ventilator
->DEVINI (M.HEAT)
down?)
A VISONIK computer's Q BUS SDLC controller has an integrated temperature detector
that is checked every minute by the VISONIK DCS operating system.
The temperature warning can be due to the following:
–
Room temperature too high
–
Faulty fan in VISONIK computer
–
Faulty temperature sensor on the Q Bus SDLC controller
–
Faulty SDLC controller
–
Data bus fault in the computer.
Check that all boards in the backplane are properly plugged in and that the fan is
working properly.
If there is a faulty sensor or controller then the SDLC controller has to be replaced.
Check the room temperature (computer location)
Normal : 18..24 deg C
Short term : 15..32 deg C
Explanation
Action