KROHNE IFC 110 Converter - Manual (Page 72)

Sect. 7.5 Part C Special applications, functional checks, service, and order numbers
72 IFC 110 F 05/2003
Group I Faults / Symptoms Cause Remedial action
I 1 Receiver instrument
indicates ”0”
Invoke test function 2.03
for analysis see Sect.7.4. Display shows...
(this check is only usefully, I SHORT Eliminate short circuit,
if current output is operating in Current output shorted, Load must be ≥ 15 Ω !
active mode, see Sect. 6.8!) Load is < 15 Ω
I OPEN Find interruption and eliminate.
Load resistance > 500 Ω
No information displayed
after test
as described for faults I 2 and I 9
I 2 Receiver instrument Wrong connection/polarity Connect properly,
indicates “0“. see Sect. 2.2 and 2.6.
act
iv
e mo
d
e
Circuit and/or receiver
instruments defective Check circuit and receiver
instrument at I
S
/ I and replace
if necessary. Check position of
jumper X3 + X6 for active mode,
see Sect. 6.8 and check fuse F9
on I/O PCB and replace if
necessary, see Sect. 8.4
and 8.7.
Receiver instruments and/or
exernal voltage source
defective Check connections, receiver
instruments and external voltage
source and replace if necessary.
p
assiv
e
mo
d
e
Internal power supply (E+E-)
is voltage source, shorted or
defective current output Check connections and cables,
see Sect. 2.3 and 2.6.
Voltage between E+and E-
approx. 24 V. If voltage is a lot
smaller, switch off the instru-
ment, eliminate the short circuit,
check position of jumper
X3 + X6 for passive mode,
(see Sect. 6.8) and replace
fuses F1 and F8 on the I/O PCB
if necessary. Switch the
instrument back on. If it still
does not operate, current output
is defective. Replace I/O PCB or
complete electronic unit,
see Sect. 8.3 and/or 8.4.
Defective current output Replace I/O PCB (see Sect. 8.4)
or consult KROHNE Service,
having first noted down hard-
ware information and error
status, see Sect. 7.3, Fct. 2.02.
Wrong flow direction setting Set properly in Fct. 3.1.
Current output switched off Switch on in Fct. 1.5.