Samsung ProXpress M453x series Service Manual page 131

► Error Code
A3–3312
A3–3320
► Error message
Sensor Failure: #A3-3312. Turn off then on. Call for service if the problem persists
The room temperature is not suitable for this set use. Please adjust room temperature
► Symptom
Outer temperature/humidity sensor is defective.
► Troubleshooting method
1) Turn the machine off then on.
2) Check the connection between the outer temp sensor and main board. If the connection is OK, replace the outer
temp sensor(JC32-00005A).
3) If the sensor is normal, replace the main
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board(JC92–02802A(M4530ND) /
4. Troubleshooting
JC92–02801A(M4530NX)).
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