Endress+Hauser Proservo NMS5 Operating Instructions Manual page 88

10 Diagnosis and Troubleshooting
Diagnostic : TEMP. COM. SHORT
(FLASHING ON ANY
DISPLAY)
G4V8H2 data correct ?
No
Enter correct number of
temperature elements at
G4V8H2.
Diagnostic : TEMP. OVER RANGE
(FLASHING ON ANY
DISPLAY)
Check NMT speci cation.
Check G4V5H0 thru H9.
Check temperature in
tank.
Data over range ?
No
Record Temperature matrix
data, exchange temperature
electronics.
88
Meaning:
Shorted element in NMT
temperature sensor.
Record Temperature
Yes
matrix data, exchange
temperature electronics.
OK ?
No
May require complete
NMT exchange. Send all
Temperature matrix (G4)
data to endress+Hauser.
Meaning:
Measured temperature data
for or more elements is over
xed range of NMT
speci cation.
Normal operation. Error
Yes
will clear when actual
temperature is within
speci cation.
Diagnostic : UNDERTENTION
(FLASHING ON ANY
DISPLAY)
Set Operation = STOP
Set G3V7H1 = ON
Yes
Measuring wire cut ?
No
Check measuring wire,
displacer, stilling pipe for
cause of undertension.
Diagnostic : WIRE CALIB ERROR
(FLASHING ON ANY
DISPLAY)
Yes
Buildup on
measuring wire ?
No
Increase G1V8H5, or adjust
Hall sensors and recalibrate.
Diagnostic : Z PHASE NO INPUT
Z PHASE NO INPUT
YYMMDDhhmm TT ##
Yes
TCB CN5, CN7 loose ?
No
Exchange detector unit,
No
adjust Hall sensors,
recalibrate.
Proservo NMS5
Meaning:
Tension on measuring wire
is more less value in
G1V6H3.
Find and x cause of cut
wire. Replace displacer,
adjust Hall sensors,
recalibrate.
Meaning:
Measured length of the
measuring wire exceeds
allowable limit:
G1V7H4 >= G1V7H5
Clean displacer, wire, wire
drum, adjust Hall sensors,
recalibrate.
Meaning:
The Z-phase signal output
from the encoder, or input
to CPU, is abnormal.
1 output = 360 degrees.
Make connections rm.
OK ?
Endress+Hauser