4-158
Troubleshooting
● Code :
29-004
29-005
20-006
29-007
● Error message
29-004 : Sensor failure: #29-004. Call for service
29-005 : Sensor failure: #29-005. Call for service
29-006 : Sensor failure: #29-006. Call for service
29-007 : Sensor failure: #29-007. Call for service
● Symptom : T/C value keeps constant. (In case of normal status, it is a periodic waveform. )
● Possible Cause:
1. Sensor defect / Sensor assembly defect / Sensor harness defect
2. ADC on the engine board is defective.
● Troubleshooting method :
[case2] ADC on the engine board is defective. Æ Replace the engine board.
[case1] Sensor defect / Sensor assembly defect / Sensor harness defect
1
2
3
① Check the circuit related to CRUM in the imaging unit.
- Disassemble the CRUM part.
- Check if the sensor harness is defective or connector is
connected properly.
- Replace the imaging unit.
② CRUM Connector in SET/Imaging unit is contaminated or connector pin is broken.
< CRUM Connector in SET >
< Imaging Unit CRUM Connector >
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