Omron E5AJ-A2HB Operation Manual page 43

Troubleshooting
6-1 Error Display and Output
PV display Error
Abnormal input
Abnormal memory OFF (2 mA
Abnormal A/D
converter
Abnormal
calibration data.
Displayed for 2 s
when the E5jJ is
turned on.
6-2 Troubleshooting
Phenomenon
Nothing is displayed when the E5jJ
is turned on.
No setting is possible.
When the Up Key is pressed for set
point value setting, the value flashes
within the set temperature range and
the setting is not possible.
No alarm, heater current value display,
or heater burnout alarm is displayed.
42
The Thermac E5jJ Temperature Controller incorporates a self-diagnostic func-
tion. The following table lists the process values and outputs that the E5jJ has
when errors result.
Output
Control
output
OFF (2 mA Processed
max.) as an
abnormally
high
temperature.
OFF
max.)
OFF (2 mA OFF
max.)
Normal operation (accuracy
not guaranteed)
Note If the input is within the possible controlling range but exceeding the possible
display range (–1999 to 9999),
–1999 and will be displayed if the value is larger than 9999, at which time, the
))))
control output and alarm output will work normally.
Refer to the following table for troubleshooting.
Probable cause
The internal mechanism is not
inserted properly into the housing.
The power supply is not connected to
the power supply terminals properly.
No power is supplied or the supplied
power is not within the specified
range.
The key protection switch is set to ON. Set the key protection switch to OFF.
The E5jJ with a communications
function is in remote mode.
The set point limit function is active.
The alarm mode switch is set to 0.
A Current Output Unit is used for
control output.
Alarm
output
Whether or not the input has exceeded the
possible controlling range ( 10% of the set
temperature range) (see note).
Whether or not the setting of the input type is
incorrect.
Whether or not the input has been incorrectly
wired, broken, or short-circuited.
Turn the E5jJ OFF and ON. If the display does
not change, the E5jJ need repairs. If the display
returns to normal, the E5jJ may have been
influenced by noise. Check for noise interference.
The E5jJ needs calibration. Contact your
OMRON representative.
will be displayed if the value is smaller than
((((
Properly insert the internal mechanism
into the housing.
Properly connect the power supply to
the power supply terminals.
Supply a voltage of 85 to 264 VAC to
the power supply terminals of the
E5jJ.
The E5jJ must be in local mode or
no front key is available.
Properly set the set point lower limit
and set point upper limit values.
Select the proper alarm mode.
No heater burnout is detected if the
Current Output Unit is used for control
output.
Section 6-2
Items to be checked
Countermeasure