Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 101

Mycom S CPM 153
Error
Feed forward control Additional module M3R-x missing
does not work
Incorrect version
Feedback input does Additional module M3R-x missing
not work
Feedback incorrect Feedback potentiometer outside
range
Feedback range not set or not set
correctly
Data cannot be saved No DAT memory module available
Error
Display dark, no LEDs No mains voltage
active
Incorrect supply voltage or too low
Connection defective
Instrument fuse defective (non-Ex)
Instrument fuse defective (Ex instru-
ment)
Power unit defective
Central module defective (if all 6
LEDs on the power unit M3G are lit)
Ribbon cable loose or defective
Display dark, but Central module defective
LED active (Module: M3Cx-x)
Display functioning, but Instrument or module in instrument
not change in display not correctly installed
and/or instrument can-
Operating system in impermissible
not be operated
state
Instrument gets hot Incorrect mains voltage or too high
Power unit defective
Endress+Hauser
Possible cause
8.1.3 Instrument-specific error
Possible cause
Remedial action
Additional module M3R-2 with 1 or
M3R-1 with 2 current inputs
Smallest permissible potentiometer
1 kohm, largest permissible potentio-
meter 10 kohms
Set lower and upper range value in
"PARAM" menu
Tests and / or remedial
action
Check whether mains voltage is
applied
Compare actual mains voltage with
nameplate rating
Terminal not picked-up; insulation
clamped
Replace fuse after comparing mains
voltage and nameplate rating
Replace fuse
Replace power unit, pay attention to
variant
Replace central module
pay attention to variant
Check ribbon cable
Replace central module M3Cx-x
Check module connections
Switch instrument off and on
Compare mains voltage and name-
plate rating
Replace mainboard
8 Troubleshooting
Equipment needed,
spare parts
See spare parts list in see Chap. 8.3
Resistance input only permissable
with non-Ex.
See spare parts list in Chap. 8.3
Resistance input only permissible
with non-Ex.
DAT available as accessory, see
Chap. 9
Equipment, spare parts,
personnel
Electrician / e.g. multimeter
Electrician / suitable fuse; see dia-
grams in Chap. 8.7
Use Ex fuse; electrician required
On-site diagnosis: all 6 red LEDs on
the M3G module must be lit
On-site diagnosis by E+H Service
(test module required)
Cable soldered onto the site of the
M3G module
On-site diagnosis by E+H Service
(test module required)
see installation diagram page 105
poss. EMC problem: if problem per-
sists, have installation checked by
E+H Service
all 6 red LEDs on the M3G module
must be lit
101