7 Simple Error Diagnosis 
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7  Simple Error Diagnosis 
7.1  Error display 
Disconnected input sensors  Out of temperature range 
PWR (red)  ON 
CH□  (red)
※
1
 
Flash (for 0.5 sec. in turn) 
Comm. output 
(decimal) 
Outputs '31000' 
Outputs '30000(high-limit)',   
'-30000(low-limit)' 
DAQMaster    Displays 'OPEN' 
Displays 'HHHH(high-limit)',   
'LLLL(low-limit)' 
※1.  The applied CH LED indicator flashes.   
7.2  Trobleshootings 
(1)  LED indicators flash (for 0.5 sec. in turn), or external device displays 
OPEN 
  Check input sensor setting. 
  Disconnect the power and check the input connection. 
  If input is connected, disconnect the input wiring from the temperature controller and 
short the + and - terminals. Power the temperature controller and check if the external 
device displays the room temperature. If it does not display the room temperature and 
continues to display HHHH or LLLL, the controller is broken. Please contact our 
technical support. (input type is thermocouple) 
(2)  Output does not operate normally. 
  Check that CH indicators for control output operates normally. 
  If CH indicators for control output does not operates, check the parameter settings. 
  If CH indicators for control output operates, remove the control output connector and 
check the output. 
(3)  External device receives no-response or abnormal data. 
  Check the communication converter (SCM-38I, SCM-US48I or SCM-US, sold 
separately). 
  Do not install communication converter line and AC power supply lines. 
  Use different communication converter power and temperature controller power. 
  Indicates damage to internal chip by strong noise. 
  Please contact our technical support. Locate the source of the noise device 
countermeasures. 
(4)  Communication does not work between TM and external device 
  Check the communication converter power and connections. 
  Check the communication settings. 
  Check the temperature controller and external device connections.