T133 — Circuit A Low Refrigerant Pressure

¿Qué significa T133 ?

This indicates low refrigerant pressure in Circuit A. Several factors can contribute to this condition.

• Low refrigerant charge
• Dirty filters
• Evaporator fan is rotating backward
• Loose or broken fan belt
• Plugged filter drier
• Faulty transducer
• Excessively cold return air
• Stuck open economizer at low ambient temperature

Haga clic en los pasos para seguir su progreso.

1. 1

   Check and clean or replace filters.

2. 2

   Verify the evaporator fan is rotating correctly and the belt is tensioned.

3. 3

   Inspect the filter drier for blockage.

4. 4

   Check the relevant transducer for proper operation.

5. 5

   Ensure the economizer is not stuck open in low ambient temperatures.

6. 6

   Consult a qualified technician for refrigerant service.