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89
4. TROUBLESHOOTING
Phenomenon
Possible cause
User response
Set point not changed
Setting of alarm not
displayed
“ ” display
flickering
“ ” display
flickering
“ ” or “ ”
display output
• Set point limits not correct
• Ramp/soak command set to other
than (for the type with the
ramp/soak function)
• Alarm type set to "No alarm"
(Code: 0)
• Input error
• Heater break
• Control loop illegally connected
EEP-ROM data destroyed
• Input error
• Input switch pin illegally set (for
multi-input type)
• Set the correct Set point limits. (See
Page78.)
• Set the ramp/soak command to
. (See Page 60~63.)
• Set the alarm type to be set. (See
Page 55~59.)
• Check the input or sensor
connection and input switch pin
setting (for multi-input type). (See
Page 19~29, 40.)
• Replace the heater.
• Set the correct control loop.
• Replace the main unit.
• Check the input or sensor
connection. (See Page 19~29.)
• Set the input switch pin correctly.
(See Page 40.)
“----” displayed
• Input value incapable of being
displayed in four digits
• Make sure the input is appropriate.
Required parameter
not displayed
• Wrong lock level is specified.
• Set the right lock level. (See Page
44~46.)
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Содержание FUZZY LOGIC CN4800
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