YOKOGAWA UT55A - Errors During Operation

16-10
IM 05P01C31-01EN
ErrorsduringOperation(4)
The errors shown below may occur during operation.
PVdisplay(Op-
erationDisplay)
Data display
(Operation
Display)
Status indicator
(Operation
Display)
Parameter
that
displays er-
ror details
Error description Cause and diagnosis Remedy
Undened Undened – – Faulty MCU MCU is corrupted.
Faulty
Contact us for repair.
Undened Undened – –
Faulty DCU (ROM/RAM
error, corrupted)
DCU is corrupted.
Faulty
Contact us for repair.
Errors during Operation On (Input/output Action)
Error
description
PVinput,RSPinput,
and aux. analog
input
Ladder
calcula-
tion
Control
compu-
tation
Control
output
Retrans-
mission
output
Alarm
action
Analog out-
put(control
output,
retrans-
mission
output)
Voltage
pulse out-
put(control
output)
Relay out-
put(control
output,
position
proportion-
aloutput)
Feedback
input(for
Position
proportion-
altype)
Contact
input
Contact
(alarm)
output
Com-
munica-
tio
Faulty MCU Undened Stopped Stopped Undened Undened Stopped 0%orless OFF
OFF Undened OFF OFF Stopped
Faulty DCU (ROM/RAM error,
corrupted)
Undened Stopped Stopped Undened Undened Stopped 0%orless OFF
OFF Undened OFF OFF Stopped
16.1Troubleshooting