Endress+Hauser Proservo NMS5 Operating Instructions Manual page 87

Proservo NMS5
Diagnostic : MPU: START ACT
MPU: START ACT
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Check local power supply
if frequent.
Diagnostic : OVERTENSION
(FLASHING ON ANY
DISPLAY)
Set Operation = STOP
Set G3V7H1 = ON
Measuring wire cut ?
No
Check measuring wire,
displacer, stilling pipe for
cause of overtension.
Diagnostic : POWER FAILURE
POWER FAILURE
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Check local power supply.
Diagnostic : RAM FAILURE
RAM FAILURE
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Endress+Hauser
Meaning:
Power supply has been
turned (off and) on.
Indicates normal operation.
Meaning:
Tension on measuring wire
is more than value in
G1V6H3.
Find and x cause of cut
Yes
wire. Replace displacer,
adjust Hall sensor,
recalibrate.
Meaning:
Supply voltage has fallen
below about AC95V.
Meaning:
CPU RAM failure.
Exchange TCB module,
adjust Hall sensors,
recalibrate.
Diagnostic : ROM ERROR
ROM ERROR
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Diagnostic : SIFA ERROR
SIFA ERROR
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Diagnostic : TEMP. BELOW RAMGE
(FLASHING ON ANY
DISPLAY)
Check NMT speci cation.
Check G4V5H0 thru H9.
Check temperature in tank.
Yes
Data below range ?
No
Record Temperature matrix
data, exchange temperature
electronics.
Diagnostic : TEMP. COM. OPEN
(FLASHING ON ANY
DISPLAY)
Yes
G4V8H2 data correct ?
No
Enter correct number of
temperature elements at
G4V8H2.
10 Diagnosis and Troubleshooting
Meaning:
CPU ROM failure.
Exchange TCB module,
adjust Hall sensor,
recalibrate
Meaning:
CPU SIFA failure.
Exchange TCB module,
adjust Hall sensor,
recalibrate
Meaning:
Measured temperature data
for one or more elements is
below xed range of NMT
speci cation.
Normal operation. Error
will clear when actual
temperature is within
speci cation.
Meaning:
Open element in NMT
temperature sensor.
Record Temperature matrix
data, exchange temperature
electronics.
OK ?
No
May require complete NMT
exchange. Send all
Temperature matrix (G4)
data to Endress+Hauser.
87