Cannot Save Setting
system
Description
New settings could not be sent and saved in the Microprocessor Stepper Module memory, and the unit alarms only.
Activation Conditions
There is an error in sending and saving new settings in the Microprocessor Stepper Module memory.
Unit Behavior
Alarm only.
Reset Conditions
Alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check Microprocessor Software Revision: Check microprocessor software. Unit should have the software upgraded to the latest version, provided for Carrier Transicold dealers on the Carrier SolutionCenter . 2. Reset Microprocessor a. Place the START/RUN-OFF switch in the OFF position. Disconnect negative battery cable, remove F1 fuse, 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. Check Active Alarm List. Alarm is cleared: microprocessor is OK. c. If this alarm remains active, unit will operate, but changes to the settings will not be retained in the microprocessor memory. Download data and replace the Micro Stepper Module (MSM). Refer to Section 5.5.