9. TROUBLESHOOTING
IMR02C15-E4
9-3
Self-diagnostic error
In an error is detected by the self-diagnostic function, the PV display shows “Err,” and the SV display
shows the error code. If two or more errors occur simultaneously, the total summation of these error
codes is displayed.
Error
number
Description Action Solution
1
Adjusted data error
• Adjusted data range is
abnormal.
2
Data back-up error
• Back-up action is abnormal.
• Data write failure
4
A/D conversion error
• Response signal from A/D
converter is abnormal.
Temperature compensation
error
• Temperature measuring
range (+100 °C or more,
−20 °C or less) is abnormal.
Display:
Error display (Err)
Control output:
Time-proportional
control output: OFF
Continuous control
output: Output of -5 %
Transmission output:
Output of -5 %
FAIL output:
Contact open
[When FAIL is selected
for the event (EV)]
Communication:
Possible
Turn off the power at
once.
If the
RB100/400/500/700/900
is restored to normal after
the power is turned on
again, then probable cause
may be external noise
source affecting the
control system. Check for
the external noise source.
If an error occurs after
the power is turned on
again, the
RB100/400/500/700/900
must be repaired or
replaced.
Please contact RKC sales
office or the agent.
If any of the following errors occur, all action of the RB100/400/500/700/900 is stopped.
In this case the error number is not displayed.
Description Action Solution
Power supply voltage is abnormal (power
supply voltage monitoring)
Watchdog timer
• The part of an internal program stops
the action.
Display: All display is OFF
Control output:
Time-proportional
control output: OFF
Continuous control
output: Output of -5 %
Transmission output:
Output of -5 %
FAIL output:
Contact open
[When FAIL is selected
for the event (EV)]
Communication:
No response
The
RB100/400/500/700/900
must be repaired or
replaced.
Please contact RKC sales
office or the agent.
<Example of error display>
Err
4
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