Model 8210/8250 Maintenance Manual Section 6. Messages and Codes
Messages and Caution Codes
Publication:1146945/001, Revised: 25 Sep 2018 6-11
Code Cold (C43)
Code Hot1 (C44)
Code Title Traction Amplifier Cold Thermal Cutback
Operator Display Cold
TA Flash Code “2,1”
System Response Travel performance may be limited.
Alarm Sounds No
Reason Low temperature (below –13°F (–25°C)) at the TA heatsink. Operation in extreme
cold environment or incorrect TA mounting.
Tests to Run 1. Verify the Traction Amp is cold. If it is, take action to bring the temperature
back within normal operating range.
2. Check for correct traction amplifier mounting.
3. Bad traction amplifier. Check TA for error code.
How to Clear Code is cleared when the traction amplifier heatsink temperature returns to within
normal operating range.
Code Title Motor Temperature Hot Cutback
Operator Display ‘Hot1’
TA Flash Code “2,8”
System Response Travel performance may be limited.
Alarm Sounds No
Reason Traction motor temperature is above 248°F (120°C). Resistance of the temperature
sensor should be 591 Ohms at room temperature.
Tests to Run Use an accurate temperature measuring device to verify the temperature reading on
the service display. See “Service Display” on page 3-17.
How to Clear Permit the motor to cool down. Replace the temperature sensor.
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