Microprocessor Error
system
Description
Main microprocessor input and/or output board configuration is incorrect with alarm 21100 not active, and the unit shuts down and alarms.
Activation Conditions
If alarm 21100 “NO COMM FROM MICRO TO DISPLAY” is not active and main microprocessor input and/or output board configuration is incorrect.
Unit Behavior
Shutdown and alarm.
Reset Conditions
Auto reset when board communications are valid, or alarm reset or Alarm may be manually reset by turning the unit off, then back on again.
Corrective Actions
1. Check Software Revision: Check microprocessor software. Unit should have the software upgraded to the latest version, provided for Carrier Transicold dealers on the TransCentral site. 2. Reset Microprocessor a. Place the START/RUN-OFF switch in the OFF position. Disconnect positive battery cable, remove F7 fuse or unplug 1MM connector, wait 20 seconds and reinstall. Then place the START/RUN- OFF back in the START/RUN position. The microprocessor powers up OK and the latest setpoint appears in the display. b. If this alarm remains active, download data and replace the main microprocessor module (MM). Refer to Section 1.5.