62-11785
7–80
21100
NO COMM FROM ANY BOARD TO MAIN MICRO
NOTE
This alarm will be available in the inactive alarm list and download only. It is an indication that an
intermittent problem has occurred and a careful diagnosis is required.
• ACTIVATION: Main microprocessor cannot communicate with any modules over the CAN bus.
• UNIT CONTROL: Required Shutdown. If alarm remains active for 2 minutes issue a shutdown command to
all modules except the display.
• RESET CONDITION: Auto reset when CAN communication is restored, or alarm may be manually reset by
turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 in
Section.) Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check CAN bus
a. Inspect connector pins & terminals on 1MM, 1SVM, and DM. Verify no damage or corrosion in
connections.
b. Check for CAN circuit continuity: CAN Hi; Refer to
CAN Lo; Refer to
. If
good continuity not present, check connectors and wiring between terminals for damage, moisture
or corrosion.
2.
Check for other CAN bus alarms
- This alarm may accompany by other alarms, complete troubleshoot-
ing steps for alarms found. If repairs have been made and the other alarms have cleared, further trouble-
shooting may not be required. If this alarm reoccurs, check CAN bus as described in the proceeding step.
3.
Perform and analyze a data download
.
22100
NO COMM FROM MICRO TO INPBD1
• ACTIVATION: Main microprocessor cannot communicate internally.
• UNIT CONTROL: Required Shutdown. If alarm remains active for 2 minutes issue a shutdown command
to all modules except the display.
• RESET CONDITION: Auto reset when internal communication is restored, alarm reset, or alarm may be
manually reset by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 in
Section.) Operate the unit through the appropriate modes to see if any active
alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
Replace Main Microprocessor
- Download data and replace main microprocessor. For complete Main
Microprocessor Module replacement instructions refer to
.
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