Yamatake SDC35, User Manual

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10-2
Chapter 10. MAINTENANCE AND TROUBLESHOOTING
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Alarm displays and corrective action
The following table shows the alarm displays and corrective actions if any failure
occurs in this unit:
Alarm code Failure name Cause Corrective action
PV input failure Sensor burnout, incorrect wiring,
(Over-range) incorrect PV input type setting
PV input failure Sensor burnout, incorrect wiring,
(Under-range) incorrect PV input type setting
CJ failure Terminal temperature is faulty
(thermocouple).
PV input failure Sensor burnout, incorrect wiring Check the wiring.
(RTD)
RSP input failure Sensor burnout, incorrect wiring,
(Over-range) incorrect RSP input type setting
(Displayed only in
the RSP mode.)
RSP input failure Sensor burnout, incorrect wiring,
(Under-range) incorrect RSP input type setting
(Displayed only in
the RSP mode.)
MFB input failure Burnout, incorrect wiring
Motor adjustment Check for burnout or incorrect
failure wiring.
Motor power shutdown.
CT input failure A current exceeding the upper
(over-range) limit of the display range was
(CT input 1 or 2, measured. The number of CT
or both) turns or the number of CT
power wire loops is incorrectly
set, or wiring is incorrect.
A/D conversion A/D converter is faulty.
failure
Parameter failure Data is corrupted by noise, or
power is shut-down while the
data is being set.
Adjustment data Data is corrupted by noise, or
failure power is shut-down while the
data is being set.
Parameter failure Data is corrupted by noise.
(RAM area)
Adjustment data Data is corrupted by noise.
failure (RAM area)
ROM failure ROM (memory) is faulty.
Check the wiring.
Set the PV input type
again.
Check the ambient
temperature.
Replace the unit.
• Restart the unit.
• Set the data again (set
data for AL95/97 and
adjustment data for
AL96/98).
• Replace the unit.
• Restart the unit.
• Replace the unit.
Check the wiring.
Set the RSP input type
again.
Check the wiring.
Set the RSP input type
again.
Check the wiring.
Check the MFB input
value.
Readjust the motor after
checking the wiring and
motor power.
Handling Precautions
• If ROM version 1 of the instrument information bank (
Id02
) is prior to
2.04, CT input failure (AL11) is not displayed.
Use a CT with the correct
number of turns for the
display range, reset the
number of CT turns, reset
the number of CT power
wire loops, and/or check
the wiring.