Refrigeration Capacity Low - Thermo King SR-2 SmartReefer2 Diagnostic Manual

32 REFRIGERATION CAPACITY LOW

Alarm Type
Associated Alarm
Codes
How Alarm is Set
Indicates that the unit's heating or cooling capacity has degraded to the point where it has insufficient capacity to
operate. The unit's cooling or heating performance is considerably impaired and corrective actions, such as defrost,
and have failed to improve performance.
How Alarm is Cleared
This alarm is cleared manually.
Considerations
Alarm code 32 is typically preceded by an alarm code 26.
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 compressor and refrigeration system.
02 February 2005
Section 5 – SR-2 Diagnostics
Shutdown Alarm
Alarm Code 26 Check Refrigeration Capacity
5-41
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