Vaisala FD12P - Manual (Page 134)

User's Guide _______________________________________________________________________
134 _____________________________________________________ M210296en-A
Message Missing
1. Check that your terminal has the correct settings. The FD12P
default is 300 bit 7E1.
If the settings are not correct, you can
- Change the baud rate, for example, to 300 baud.
- Check that you have seven data bits, even parity, one stop bit.
2. Try the OPEN command (see section Entering/Exiting the
Command Mode on page 61) and try other commands to see if
the FD12P is already in the command mode.
3. Go to the site with the maintenance PC (terminal), terminal
cable, tools, and the calibrator set.
4. Check that the FD12P powered by opening the FD12P
electronics enclosure cover to check if the LEDs are blinking.
5. If no LED is on, do the following:
- Check that the main switch is on (FDW13).
- Check the mains fuse (250 mA) and replace it if needed.
WARNING The main fuse contains dangerous voltages of 230 VAC.
- Check the low voltage fuse on the regulator board and
replace it if needed.
- Check that all the connectors are properly inserted.
- Check the power cable and connections.
- Measure the mains voltage.
6. If the green LED is blinking (once per second for correct
operation), do the following:
- Connect a maintenance terminal to the RS-port.
- Check steps 1 and 2.
- Try resetting by turning off power or disconnecting the fuse
on the regulator board for a few seconds.
7. When only the red LED is lit or blinking, do the following:
- Try resetting as above.
- If the state continues, it is probably caused by either the
program memory or CPU fault.