■ Maintenance
● Cleaning
When removing the dirt from the measuring instrument, wipe it off with a soft
cloth rag. At this time, do not use any organic solvent, such as paint thinner or
benzene.
● Part replacement
Do not replace any parts of this unit.
● Fuse replacement
When replacing the fuse connected to the electric wiring, always use the specified
standard fuse.
Standard IEC127
Shut-down speed Slow-action type (T)
Rated voltage 250V
Rated current 200mA
■ Alarm display and corrective action
The following table shows the alarm displays and corrective actions if any failure
occurs in this unit:
Handling Precautions
• If ROM version 1 of the instrument information bank (Id02) is prior to
2.04, CT input failure (AL11) is not displayed.
Chapter 9. MAINTENANCE AND
TROUBLESHOOTING
9-1
Alarm code
Failure name Cause Corrective action
AL0 1 PV input failure Sensor burnout, incorrect wiring, Check the wiring.
(Over-range) incorrect PV input type setting Check the PV input type setting.
AL02 PV input failure Sensor burnout, incorrect wiring,
(Under-range) incorrect PV input type setting
AL03 CJ failure Terminal temperature is faulty Use the unit at an ambient temperature
(thermocouple). meeting the operating conditions stated
in the specification.
PV input failure Sensor burnout, incorrect wiring (RTD) Check the wiring.
AL 1 1 CT input failure A current exceeding the upper limit of • Use a CT with the correct number of
(over-range) the display range was measured. turns for the display range.
(CT input 1 or 2, The number of CT turns or the number • Reset the number of CT turns.
or both) of CT power wire loops is incorrectly set, • Reset the number of CT power wire loops.
or wiring is incorrect. • Check the wiring.
AL70 A/D conversion A/D converter is faulty. It is thought that the main body needs to
failure be replaced.
Contact the azbil Group or its dealer.
AL95 Set data failure Data is corrupted by noise. Turn ON the power again.
Power is shut-down while the data is If the same alarm occurs after that, set the
being set. data (set data for AL95/97 and adjustment
AL96 Adjustment data Power is shut-down while the data is data for AL96/98) and turn ON the power
failure being set. again.
Data is corrupted by noise. If the same alarm occurs again even after
AL97 Set data failure Data is corrupted by noise. the above steps have been taken, the main
(RAM area) body needs to be replaced.
Contact the azbil Group or its dealer.
AL98 Adjustment data Data is corrupted by noise.
failure (RAM area)
AL99 ROM failure ROM (memory) is faulty. Turn ON the power again. If the same
alarm occurs again, the main body needs
to be replaced.
Contact the azbil Group or its dealer.
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