Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
5-10 Service & Troubleshooting Revised Feb-2013
reversing the steps from 7 to 3.
8. Apply power (re-connect TB1 and applicable TB2) and test the
unit.
5.2.7 Removing/Replacing the MVT or GPT Transducer
1. If the ControlWave GFC Plus is running, place any critical
control processes under manual control.
2. Open the cover and shut down the ControlWave GFC Plus by
disconnecting the power at the CPU/System Controller assembly
terminal TB1 (and if applicable, TB2).
3. Remove the ControlWave GFC Plus from its installation site and
take it to a repair area that supports proper ESD (electrostatic
discharge) control.
4. Disconnect the MVT/GPT interface cable from CPU/System
Controller board connector P1.
5. Remove the large mounting collar (nut) from the neck of the
MVT/GPT; then unscrew the four screws within the enclosure
that secure the MVT/GPT mounting plate to the bottom of the
enclosure. Remove the MVT/GPT.
6. To install a replacement MVT/GPT, reverse steps 5 through 3.
Make sure the MVT/GPT O-ring seal is in place and apply anti-
seize compound as required. When you install an MVT at the
bottom of the enclosure, orient the flange for the desired high
and low settings.
5.3 General Troubleshooting Procedures
This section presents some procedures to troubleshoot problems with
the GFC Plus.
5.3.1 Common Communication Configuration Problems
If serial communications do not function, it is often due to one of the
following issues:
 Baud rate mismatch – the baud rate at both ends of the
communication line must match. If communications fail during a
download of a new flash configuration profile (FCP) file, you may
have changed the baud rate of the active communication line, since
baud rate changes occur immediately on FCP download. You can
always re-establish factory default baud rates for communication
ports by powering down the unit, and then setting CPU switch SW2-
3 to OFF and restoring power.
 Incorrect BSAP local address – this address must be an integer from
1 to 127 and must be unique on this particular BSAP communication
line. You set the BSAP local address using the flash configuration