Environmental Sensor Failure
The Environmental Sensor has failed.
Error Codes that Apply
123 and 124
Initial Troubleshooting Actions to Take
1. Cycle the printer's power.
2. If the problem persists follow the procedure below.
Parts of the Printer that Apply
1. Environmental Sensor
2. Environmental Sensor Wiring
3. Engine Control Board
Troubleshooting Procedure
Steps Action Taken Yes No
1
Test the Temp/Humidity Sensor.
1. Run the Scan Switch Test
HUM_TEMP_OHP
2. Verify proper operation by blowing
on the sensor. Is the sensor operating
correctly?
Replace the Engine
Control Board
Go to Step 2.
2
Replace the Temp/Humidity Sensor.
Does the error persist?
Go to Step 3.
Complete
3
Check the Environmental Sensor
Wiring. Is it properly connected and
undamaged?
Reconnect/Repair
Wiring Harness
Replace the Front
Sensor Board / Motor
Driver Board / Engine
Board in order.
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