Thermo King SR-2 SmartReefer2, Diagnostic Manual

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Section 5 – SR-2 Diagnostics
20 ENGINE FAILED TO START
Page 1 of 1
Alarm Type Log, Check, Prevent or Shutdown Alarm
Associated Alarm
Codes None
How Alarm is Set
The engine failed to start after the starter motor was allowed to crank for the maximum allowed time. Two start
attempts are normally made. The crank timer on the first start attempt is 25 seconds. The crank timer on the
second start is 45 seconds.
Notes:
An Alarm Code 20 that follows an Alarm Code 17/84 Failed to Crank alarm will be set as a shutdown alarm.
If Alarm Code 20 follows an Alarm Code 63 alarm clear, only one crank attempt will be made.
How Alarm is Cleared
The alarm is cleared manually.
Considerations
This alarm become a log alarm if the unit is switched to Electric mode.
Diagnostic Procedure
1. Check the unit fuel level.
2. Check fuel solenoid, fuel pump, and fuel system, both electrically and mechanically.
3. Check for cause of slow start or no start of the engine.
4. In cold ambient temperatures check for fuel gelling.
5. Check for restricted air cleaner or air intake system.
6. Verify the intake air heater is operating properly, using Interface Board Test Mode.
7. If a Model 50 electric standby unit, check for a failed clutch or seized electric motor.
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02 February 2005