Fault Elimination - Endress+Hauser Hart RN221N Manual Del Usuario

8 Fault elimina-
tion
Mode
'On'-LED does not light
General
up
Relay does not switch in
4...20 mA
event of error current,
communication LED
operation
flashes
'Alarm' LED and com-
®
HART
munication LED flash
alternatively
operation
Effect
Either the input circuit or
output circuit is not
closed
Power supply not con-
nected
Device in HART
ating mode
No HART
can be established to the
transmitter
Cause

Fault elimination

Check connection
Check connection
®
oper- Set DIP switches 4-9 to
OFF
®
connection Check connections,
check HART
cation resistor (DIP
switch 1)
®
communi-
39