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18 HIGH ENGINE COOLANT TEMPERATURE
Alarm Type
Associated Alarm
Codes
Component Description and Location
The engine temperature is excessively high, as determined by the Coolant Temp Sensor. See Alarm Code 07
Check Coolant Temperature Sensor for circuit details.
How Alarm is Set
1. The coolant temperature is high, as determined by the coolant temperature sensor, and the coolant level
sensor is not indicating low coolant level. Alarm Code 18 High Engine Coolant Temperature is set as a
Prevent alarm. Two attempts will be made to allow continued operation at temporarily reduced
performance. If, at the end of the two attempts full performance is not possible, the alarm is set as a
Shutdown alarm.
If continuous restarts are enabled, a shutdown alarm is not set after 3 attempts.
If restarts are disabled, the alarm will be set as a shutdown on the first occurrence.
2. The coolant temperature is high, as determined by the coolant temperature sensor, and the coolant level
sensor is indicating low coolant level. Alarm Code 18 High Engine Coolant Temperature is set as a
Shutdown alarm.
How Alarm is Cleared
1. The alarm can be cleared manually if the condition no longer exists.
2. The alarm will clear automatically at the conclusion of a successful prevent routine.
Considerations
This alarm becomes a log alarm if the unit is switched to electric mode. Alarm Code 18 alarm conditions will be
monitored while the unit is operating in electric mode, and will auto-clear when the engine coolant temperature is
reduced to a safe value.
Diagnostic Procedure
1. Check the engine water temperature using the Gauge Menu. If the temperature is above 220°F (104°C), check
the engine cooling system to determine the cause of overheating.
2. Check the engine coolant level. Bleed air from the cooling system if necessary. CAUTION: Do not open the
radiator when hot!
3. Check the water pump drive belt.
4. Check the radiator for airflow and coolant flow restrictions.
5. Check the Water Temperature Sensor, as shown in Alarm Code 06 above.
02 February 2005
Section 5 – SR-2 Diagnostics
Prevent or Shutdown Alarm
Alarm Code 84 Restart Null
5-27
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Do you have a question about the SR-2 SmartReefer2 and is the answer not in the manual?
Questions and answers
looking for the procedure that you must due to set up the unit before recovering the refrigerant
Before recovering refrigerant from the Thermo King SR-2 SmartReefer2 unit, follow this setup procedure:
1. Log the existing microprocessor settings using Service Procedure A02A to retain configuration data.
2. Connect the download cable to the ServiceWatch port on the unit.
3. Turn the unit on.
4. Start Wintrac 4.4 software.
5. Press CTRL-SHIFT-T to access the Wintrac Tool Menu.
6. Select Tools > Restart Device > Cold Restart.
7. Confirm by selecting “Yes” to begin the cold start, which takes approximately 15 minutes.
8. After the cold start, set up the unit using Service Procedure A04A.
9. Finally, run a Pretrip Test as shown in Section 4 to verify proper operation.
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