![background image](http://html1.mh-extra.com/html/carrier/vector-1800-mt/vector-1800-mt_operation-and-service-manual_2564194253.webp)
7-122
62-11039
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
249 MICROPROCESSOR ERROR
•
TRIGGER–ON: Microprocessor Input Conversion Error
•
UNIT CONTROL: Shutdown and alarm
•
UNIT CONTROL: Shutdown and alarm
•
RESET CONDITION: Auto Reset when input conversions are valid, or Alarm may be manually
reset by turning the unit off, then back on again.
Follow the steps below until a problem is found. Once a repair or correction has been made, clear the alarm(s). (See
Note 1) Operate the unit through the appropriate modes to see if any active alarm occurs. Continue with the steps
below as necessary.
1
Check Microprocessor
a. Check Temperature Sensor Data
Must be valid reading for RAT, SAT, AAT, etc.
b. Check for any Active Sensor Alarms
Must all be cleared.
2
Check Microprocessor & Unit Wiring
a. Check Wiring to Micro and at input
devices to the micro.
Must not be miss wired to allow 12 VDC on any of the
sensor input circuits.
3
Reset Microprocessor
a. Turn Start/Run--Off switch off for 30
seconds, then turn back on.
Microprocessor powers up OK
b. Alarm 249 remains active.
Replace microprocessor.
Summary of Contents for VECTOR 1800 MT
Page 1: ......
Page 2: ...OPERATION SERVICE MANUAL for VECTOR 1800 MT Trailer Multi Temp Refrigeration Units ...
Page 19: ...1 5 62 11039 1 3 SAFETY DECALS ...
Page 20: ...1 6 62 11039 62 03958 00 Heat Warning 62 03957 01 High Voltage 62 60280 00 Standby Safety ...
Page 21: ...1 7 62 11039 ...
Page 303: ...10 1 62 11039 ...
Page 310: ...10 8 62 11039 BASED ON ENGINEERING SCHEMATIC 62 60926 REV G NEXT SHT ...
Page 311: ...10 9 62 11039 FROM PREVIOUS SHT ...