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Alarm Codes
75
501
Check Host Evaporator Fan High
Speed
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
505
Check Roadside Condenser Fan
Motor Speed Circuit
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
506
Check Curbside Condenser Fan
Motor Speed Circuit
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
508
Speed Request Communications
Error
Report alarm at end of day.
509
Engine Control Unit (ECU) Failed to
Enable
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
510
Engine Control Unit (ECU) Run
Signal Failed
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
511
Engine Wait to Start Time Delay
Expired
Report alarm at end of day.
516
I/O Controller to Application
Controller Communication Failure
Unit cannot operate and is shut down. Repair immediately.
517
Water In Fuel
Report alarm at end of day.
518
Generator Ground Fault
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
519
Check Battery Charger Input Power
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
520
Check Battery Charger Output
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
521
Battery Charger Overheat Shutdown Report alarm at end of day.
522
Battery Temperature Sensor Alarm
Report alarm at end of day.
523
Battery Charger Exceeded High
Temperature Limit
Report alarm at end of day.
528
Failed CAN Communication
Controller and Battery Charger
Report alarm at end of day.
529
Check Fuel Pump Circuit
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
530
Low Pressure Differential
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
538
Engine J1939 CAN Datalink
Degraded (Electronic Engine Only)
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
539
Engine J1939 CAN Datalink Failed
(Electronic Engine Only)
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
540
Illegal Engine Operating State
If unit is shut down repair immediately. Otherwise, report
alarm at end of day.
542
Battery Charger Fault - Unit Forced
to Low Speed
Report alarm at end of day.
543
Battery Charger Internal Short
Report alarm at end of day.
544
Battery Charger External Short
Report alarm at end of day.
545
Battery Charger Output DC Voltage
Exceeded Limit
Report alarm at end of day.
546
Battery Charger Operating Bulk
Voltage Out of Range
Report alarm at end of day.
547
Battery Charger AC Bus Phase Loss Report alarm at end of day.
COLOR CODE DEFINITIONS
OK TO RUN
CHECK AS SPECIFIED
TAKE IMMEDIATE ACTION
Num
Description
Operator Action