Section 5 – SR-2 Diagnostics
17 ENGINE FAILED TO CRANK
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Alarm Type
Log, Check, Prevent or Shutdown Alarm
Associated Alarm
Codes
Alarm Code 84 Restart Null
How Alarm is Set
The engine fails to reach 40 RPM during the engine crank sequence. Two attempts are made to crank, and then
Alarm Code 17 Engine Failed to Crank is set as a shutdown alarm.
How Alarm is Cleared
The alarm is cleared manually.
Considerations
This is a Prevent alarm. Two attempts will be made to crank the engine. If at the end of the two attempts the
engine does not crank, the alarm is set as a Shutdown alarm.
Notes:
An Alarm Code 17 that follows an Alarm Code 20/84 Failed to Start will be set as a shutdown alarm.
If Alarm Code 17 follows an Alarm Code 63 alarm clear, only one crank attempt will be made.
Diagnostic Procedure
1. Check the battery, battery cables and starter.
2. Be sure the interface board fuse F3 is not blown.
3. Check the operation of the starter circuit by forcing an engine start in Continuous mode. LED 25 should
light indicating the starter motor is energized and the engine should start.
4. Check the 8S circuit for a pushed pin, loose pin crimp or broken wire.
5. Check the High Current Harness 8S wire with an ohmmeter for continuity, per Service Procedure H04A.
6. Check for a seized compressor or engine.
7. If a Model 50 electric standby unit, check for a failed clutch or seized electric motor.
5-26
02 February 2005
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