Compac CNG

Processor Board Replacement
Servicing
Compac Industries Ltd.
Page 62
www.compacngv.com
Processor Board Replacement
Before you start
Obtain the following replacement parts
 Replacement C4000 Processor part number F-CP-C4PROCES-A
Remove the C4000 Processor board
1. De-gas the dispenser (see page 40).
2. Remove the cover of the C4000 enclosure.
3. If possible, record all the set-up data by accessing the Parameter
switch (SW1) and the K-Factor switch (SW2). The Software Set-Up
and Upgrade section (see page 19) contains details on obtaining this
information.
4. Switch off the power supply to the dispenser.
5. Remove both the EPROM and memory chips Dispenser Software
Upgrade/Replacement (see page 64)
Take basic anti-static precautions by wearing a
wristband with an earth strap.
6. Unplug all wiring from the C4000 microprocessor board and remove
the board from its position.
Take basic anti-static precautions by wearing a
wristband with an earth strap.
Install New C4000 Processor
1. Put the new board in place of the old one, and plug all the wiring back
in the same order as before.
2. Refit the EPROM and memory chips, as per Dispenser Software
Upgrade/Replacement (see page 64)
3. Check dispenser operation Checking Dispenser Operation (see page
42)
It should not be necessary to recalibrate the dispenser.