EF-Series Instruction Manual
Rev 2/01 3-13
3.6 TROUBLESHOOTING AND REPAIR
There are no user serviceable parts on the communications cards. If a card appears to be operating
improperly, verify that the card is set up according to the information contained in Section 3.4, “Initial
Installation and Setup.” If it still fails to operate properly, the recommended repair procedure is to
remove and replace the card. The faulty card should be returned to your Fisher Representative for
repair or replacement.
Follow the procedures below to help ensure data is not lost and equipment is not damaged during
replacement of a communications card.
3.6.1 Replacing a Communications Card
If you are installing a communications card for the first time, refer to Section 3.4. To remove and
replace a communications card on an in-service EF-Series unit, perform the following procedure. Be
sure to observe the cautions to avoid losing data and damaging equipment.
CAUTION
When repairing units in a hazardous area, ensure that the components selected are
labeled for use in such areas. Change components only in an area known to be non-
hazardous.
CAUTION
There is a possibility of losing the flow computer’s configuration and historical data
while performing the following procedure. As a precaution, save the current
configuration and historical data as instructed in Section 2.8.1, Backup Procedure.
CAUTION
Be sure to use proper electrostatic handling, such as wearing a grounded wrist
strap, or components on the circuit cards may be damaged.
CAUTION
During this procedure, all power will be removed from the EF-Series unit and
devices powered by the EF-Series unit. Ensure that all connected input devices,
output devices, and processes will remain in a safe state when power is removed
from the unit and also when power is restored.
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