Service Manual FCD 300
Release 01/2003
14
Revise 08/01/2003 by DD Service Manager, Steffen Sundbæk
10.
Special conditions, which might cause problems
•
The earth connection must be good especially in PROFIBUS installations.
It is important to fit a heavy connection from the frame of the controller having the
PROFIBUS master (PLC) and all bus nodes.
•
Check all screws and pins securing the internal earth connection.
•
Screws fixing the printed circuit boards
•
Screws fixing the control card cassette
•
Pins in the edge(s) of the electronic box
•
Screws fixing the spring(s) in the installation part
•
Earth connection done by the customer
(See location of screws in chapter “Place, tightening torque and sequence for
screws”)
•
Cables must be carefully placed in the installation box to avoid mechanical damage
when the plugs between the electronic part and the installation part are joint.
•
If 24 V back up supply is used (EB versions) the 400 V power should not be switched on
approx 3 seconds later than the 24 V. Switch it on simultaneously (before 2 seconds) or
after 4 seconds. Else fault 37 will trip the unit (see product note no 6).
•
If the SW version is 1.32 or older, the FCD could trip with alarm “high temp.” when the
drive is switch on out in an “under voltage”, wrong alarm massage. This fault is
corrected in SW version 1.40. To correct this fault, if occur update the SW to 1.42 or
newer.
•
Connector problem. Pins in the 36-pole multi connector plug could be damage doing
placing the electronic part on the installations box after a repair or service. (see product
note no. 7)
This problem could normal seen as a bus communication future, since the pin that is
most exposed are the bus connection to the control card. If the problems occur then
check the plug directly on the control card for damage. If the control card is damage
change the control card and the pin extension else only change the pin extension.
