Azbil 100 Series, User Manual

Page: 74 / 80

6-4
Troubleshooting Codes
Message Cause Correction
LO IIN
Input signal is too low
(3.8 mA or lower).
Provide an input signal of at least
3.8mA.
VTD FAULT
(Valve position sensor)
Feedback lever has fallen off or has
turned beyond the allowable
turning angle (± 20°C)
„
VTD connector has become
disconnected.
„
VTD input line has been
disconnected or short-circuited.
Check if feedback lever has fallen
off and that it is within permissible
turning angle.
Contact Azbil Corporation.
A/D FAULT (Analog/Digital conversion) Contact Azbil Corporation.
NVM FAULT (Non-Volatile Memory) Contact Azbil Corporation.
RAM FAULT (RAM error) Contact Azbil Corporation.
ROM FAULT (ROM error) Contact Azbil Corporation.
SHUT ON SVP is forced fully closed
Apply an input signal above the
forced fully shut value.
Use the Commstaff to check and/
or adjust the forced fully open/
close values (%).
HI/LO EPM OUT
Electro-pneumatic Module is
outside normal range
- No air is being supplied
- Valve is closed
- Galling of valve stem
- Clogged nozzle
- Clogged orifice
- Input signal is 4 mA or less
„
Check air supply pressure
„
See that the input signal is 4 mA
or greater
„
Confirm A/M switch is Auto
„
Clean air nozzle
„
Clean orifice
„
Adjust the EPM balance (Refer
to page 5-5)
„
Change the input signal and
check that the device is oper-
ating normally.
EXT ZERO
ACTIVE
Zero and span adjustment switch
is being made.
Release the zero and span
adjustment switch.
MANUAL MODE Dummy input signal from
Commstaff/HART.
Cancel the dummy current input.
FIXED EPM OUT Dummy EPM pseudo-drive signal
from Commstaff/HART.
Cancel the dummy EPM signal.
OUTPUT MODE Dummy pseudo-signal output
state for Commstaff/HART.
Cancel the dummy output.
CORRECT
RESET
Data was reset at the time of
shipment.
Set actuator type and other
parameters before use.
OVER TEMP
Abnormal Temperature within
SVP unit.
Check SVP temp and move it
to a cooler location.