7 Troubleshooting Tips
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7 Troubleshooting Tips
7.1 Error Display
Display LED is flashing every 0.5 sec or an external connecting
device displays error message while using the product.
This is a warning indicating that the external sensor is OPEN. Cut the power to the unit
and check if the sensor is connected. If abnormality is found in input sensor connection,
disconnect input sensor from controllers and make connection between input (+) terminal
and input (-) terminal in order to check whether current ambient temperature is displayed.
If current ambient temperature is displayed, it can be inferred that the controller is
operating normally. IF HHHH or LLLL is displayed, however, it can be inferred that
problems are found on the controller. Please contact Autonics service center. (This error
check can be available for only thermocouple type.)
Make sure a proper input sensor has been selected.
TM2 Series TM4 Series
LED Status
When opening the
sensor input
When exceeding the
operational temperature
range
PWR LED PWR LED Red light ON
CH1 LED CH1 LED Flashing in red (0.5 sec. intervals)
CH2 LED CH2 LED Flashing in red (0.5 sec. intervals)
- CH3 LED Flashing in red (0.5 sec. intervals)
- CH4 LED Flashing in red (0.5 sec. intervals)
Communications output
(decimal number)
‘31000’ output
‘30000’(high-limit) output
‘-30000’(low-limit) output
Program for PC only Display ‘OPEN’
‘HHHH (high-limit)’ display
‘LLLL (low-limit)’ display
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