Flowcharts For Diagnostics And Troubleshooting - Endress+Hauser Proservo NMS5 Operating Instructions Manual

10 Diagnosis and Troubleshooting
Diagnostic : -49.5 C
(Level display)
-49.5 C
For up to 10 elements,
check G4V5H0 thru H9 to
nd shorted element.
For more than 10
elements, select element at
G4V7H0, view
temperature at G4V7H3.
Diagnostic : 358.0 C (at G4V5_or G4V7H3)
359.0 C
TEMP. NO. n
This is an indicator, not an
error code. Verify total
number of elements at
G4V8H2.
Diagnostic : 359.5 C
(Level display)
359.5C
For or up to 10 elements,
check G4V5H0 thru H9 to
nd open element.
For more than 10 elements,
select element at G4V7H0,
view temperature at
G4V7H3.
Diagnostic : ADC SENSOR ERROR
ADC SENSOR ERROR
YYMMDDhhmm TT ##
TCB CN5, CN7 loose?
No
Exchange detector unit,
adjust Hall sensors,
recalibrate.
84
10.3

Flowcharts for Diagnostics and Troubleshooting

Meaning:
Shorted element in NMT
temperature
May require complete NMT
exchange. Send all
Temperature matrix (G4)
data to Endress+Hauser
Meaning:
Element not enabled, or not
installed in NMT
temperature sensor
Meaning:
Open element in NMT
temperature sensor
May require complete
NMT exchange. Send all
Temperature matrix (G4)
data to Endress+Hauser
Meaning:
The A/D signal output from
the detector unit, or input to
CPU, is abnormal.
Yes
Make connections rm.
Diagnostic : ADJ A, I or Z COUNTER
ADJ(A, I, Z) COUNTER
YYMMDDhhmm TT ##
Raise displacer to red line
in calibration window, or
into maintenance
chamber.
Yes
Wire ring at normal
position ?
No
Yes
G3V5H0 = G3V5H1 = 0?
No
No
Displacer stopped at
Upper Stop, G1V6H0?
Yes
Automatic software
adjustment working
normally. Sometimes seen
in turbulent applications.
Diagnostic : A PHASE NO INPUT
A PHASE NO INPUT
YYMMDDhhmm TT ##
Yes
TCB CN5, CN7 loose?
No
Exchange detector unit, No
adjust Hall sensors,
recalibrate.
Proservo NMS5
Meaning:
Automatic software
adjustment working
normally. Sometimes seen in
turbulent applications.
Yes
3V5H0 = G3V5H1 = 0?
Noise interface to internal
software counters.
Eliminate noise, adjust Hall
sensors, recalibrate.
Raise displacer manually
(G3V7H6) until red line in
window.
Meaning:
The A-phase signal output
from the encoder, or input
to CPU. is abnormal.
20 outputs = 360 degrees.
Make connections rm.
OK?
Endress+Hauser