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8. ERROR CODES
Reading Error Codes
BA series units have a self-diagnostic function built into the CPU board and a separate safety device,
independent of the CPU board.
The table below shows possible causes and measures to take when safety device is triggered.
Error Codes
When an operational error or malfunction occurs, the alarm lamp on the control panel illuminates, an
error code is displayed, and an alarm sounds. When an error occurs, confirm the error code and
terminate operation immediately. Note that a temperature gauging error will be indicated by ALARM
lamp illuminating and accompanied by dashes in the display. No error code will be displayed and no
alarm will sound.
Safety device
Symptom
Possible causes and countermeasures
Sensor error
detected
Alarm lamp on
in display
Temperature sensor interrupted,
disconnected or other malfunction
Contact a local dealer or Yamato sales
office
Short circuit
detected
Alarm lamp on
in display
Short circuit in SSR (solid state relay)
Contact a local dealer or Yamato sales
office
Heater
interruption
detected
Alarm lamp on
in display
Heater interrupted or disconnected
Current detection element interrupted,
disconnected or other malfunction
Contact a local dealer or Yamato sales
office
Memory error
Alarm lamp on
in display
Memory setting error
Contact a local dealer or Yamato sales
office
Internal
communication
error
Alarm lamp on
in display
Internal communication error,
temperature input circuit error
Contact a local dealer or Yamato sales
office
Overheat
Alarm lamp on
in display
Overheat prevention unit activated
Overheat prevention unit interrupted
disconnected or other malfunction
Check the temperature setting.
If the unit does not reset, contact service
department.
Temperature
gauging error
----
in display
Gauged temperature is out of display
range
Contact a local dealer or Yamato sales
office
Summary of Contents for BA300
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