Samsung ProXpress M453x series Service Manual page 130

4. Troubleshooting
► Error Code
A3–3212
► Error message
Sensor Failure: #A3-3212. Turn off then on. Call for service if the problem persists
► Symptom
Inner temperature sensor is defective.
► Troubleshooting method
1) Turn the machine off then on.
2) Check the connection between the inner temp sensor and main board. If the connection is OK, replace the inner
temp sensor(1404-001417) .
3) If the sensor is normal, replace the main
4-35
board(JC92–02802A(M4530ND) /
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JC92–02801A(M4530NX)).