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26 CHECK REFRIGERATION CAPACITY
Alarm Type
Associated Alarm
Codes
How Alarm is Set
1. This alarm is generated if the unit's heating or cooling capacity is reduced far enough below normal levels
to indicate a refrigeration problem.
2. The capacity loss is not significant enough to force the unit into shutdown mode.
3. This alarm can be generated in cool or heat mode.
How Alarm is Cleared
This alarm is cleared manually or automatically.
Considerations
If the unit is running in reduced capacity mode because of a Prevent alarm and Alarm Code 26 is set, Alarm Code
85 Forced Unit Operation alarm is also set. Alarm Code 85 indicates the unit was forced into a reduced capacity
mode.
Diagnostic Procedure
Download and review the ServiceWatch data logger using Technician Level to determine the conditions at the time
the alarm was set.
1. Check temperature differential by displaying the temperature differential, or by checking the difference
between the control return and control discharge sensors.
2. Check refrigerant level.
3. Attach gauges and evaluate unit refrigeration system performance.
4. Verify that sensor grades are set correctly.
5. Check for proper air flow. Short cycling, caused by a blocked air flow path, may generate this code.
6. Check evaporator superheat.
02 February 2005
Section 5 – SR-2 Diagnostics
Check Alarm
Alarm Code 85 Forced Unit Operation
5-36
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Need help?
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.
This answer is automatically generated