Traulsen Cabinet Sensor Open or Shorted Error Code
The Intela-Traul control reads the cabinet air sensor as open or shorted.
Source: TRAULSEN/00213 Traulsen Intela-Traul Alarms Tech Bulletin TTB0013 (07-15).pdf
What does Traulsen Cabinet Sensor Open or Shorted mean?
This alarm means the controller cannot read a valid signal from the cabinet air sensor because the probe circuit is open or shorted. The cabinet sensor governs cabinet temperature control, so a bad reading leaves the control without reliable feedback. A correct cabinet sensor reads about 32.7K ohms at 32F within ten percent.
Symptoms
- Alarm LED illuminated and horn sounding on the control
- Erratic or implausible cabinet temperature reading
- Cabinet not maintaining temperature properly
- Sensor resistance out of the expected range when tested
Common causes
- Cabinet sensor probe disconnected or loosely connected
- Open circuit in the cabinet sensor wiring
- Shorted cabinet sensor
- Failed cabinet sensor reading outside the 32.7K ohm range at 32F
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Diagnostic steps
Locate the cabinet sensor
Gain access to the cabinet air sensor mounted inside the evaporator housing on the return-air side of the coil.
Check the connection
Confirm the sensor probe is properly connected; reconnect it if it is loose or disconnected.
Test sensor resistance
Disconnect the sensor and place the probe tip in an ice-water bath; at 32F resistance should read about 32.7K ohms plus or minus ten percent.
Replace a failed sensor
If resistance is outside that range, replace the cabinet sensor.
Verify correct placement
Re-mount the sensor in its correct location on the return-air side so the control reads representative cabinet temperature.
When to call a professional
Call a technician if reconnecting the probe does not clear the alarm or if you are not equipped to meter sensor resistance against the 32.7K-ohm spec. Accessing the sensor inside the evaporator housing, testing the probe in an ice-water bath, and replacing it with correct placement are service tasks; an incorrectly placed or wrong-value sensor will keep the control from regulating temperature.
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Other Traulsen Error Codes
Cabinet temperature has risen above the high-temperature alarm setpoint on the Intela-Traul control.
Cabinet temperature has dropped below the low-temperature alarm setpoint on the Intela-Traul control.
The Intela-Traul control detects a cabinet door open longer than the allowed time.
The Intela-Traul control detected an interruption of power to the unit.
The Intela-Traul control detects a refrigeration system leak based on discharge-line temperature behavior.
The Intela-Traul control signals that the condenser coil needs cleaning or that condenser airflow is restricted.
The Intela-Traul control reads the evaporator coil sensor as open or shorted.
The Intela-Traul control reads the discharge line sensor as open or shorted.
The Intela-Traul control reads the liquid line sensor as open or shorted.
Defrost has terminated by time rather than by temperature for 72 hours on the Intela-Traul control.