Maintenance - Chauvin Arnoux Statop 4849 Manual De Instrucciones

5.1. Trouble shooting
SYMPTOM
LED's will not light
PV Display shows
« SbEr »
PV Display shows
« LLEr »
PV Display shows
« HLEr »
PV Display shows
« AtEr »
PV Display shows
« oPEr »
PV Display shows
« CSEr »
PV Display shows
« AHEr »
Display unstable
Considerable error in
temperature indication wrong input mode
Display counts in
reverse direction
Heat or output stays
on but indicator reads shorted
normally
Display blinks, entered
values change by
themselves
Control anormal or
operation incorrect

5. MAINTENANCE

PROBABLE CAUSE
No power to instrument
Power supply defective
Some segments of the display or
LED not lit or lit erroneously.
LED display or LED lamp defective
Related LED driver defective
Sensor break down
PV display beyond low range
setpoint
PV display beyond high range
setpoint
Incorrect operation of auto-tune
procedure
ON-OFF control operating in
manual mode
Check Sum error
Analogue hybrid module damage
A-D converter damaged
Input sensor defective
Intermittent connection of sensor wiring
Wrong sensor type connected or
Defective analogue component
Sensor wiring reversed
Output device or power service
Electromagnetic interference
EEPROM defective
CPU, EEPROM or key switch defective
Operation incorrect
REMEDY
Check power, wiring, fuses
Return to supplier
Return to supplier
Return to supplier
Replace sensor or check wiring.
Use manual mode.
Re-adjust « LLit » value
Re-adjust « HLit » value
Repeat procedure and refer to manual
section 4
Increase Proportional Band
Check & re-configure control
parameters
Return to supplier. Check for source
of damage e.g. transient spikes
Return to supplier
Check sensor
Check sensor connections
Check sensor and input code
Return to supplier
Check wiring
Check and replace
Suppress arcing contacts.
Separate sensor & power wiring.
Return to supplier
Return to supplier
Read manual
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