Drain Sensor Abnormal

¿Qué significa P4 ?

The indoor unit's drain sensor is abnormal, indicating a fault with its circuit. This sensor monitors the condensate drain pan level to prevent overflow, and a fault can lead to water leakage.

• Drain sensor (22) is abnormal.
• Faulty sensor for drain pan level.
• Wiring issue to the drain sensor.

Haga clic en los pasos para seguir su progreso.

1. 1

   Measure the resistance or output of the drain sensor according to manufacturer specifications.

2. 2

   Inspect the sensor's wiring and connector on the indoor unit PCB for damage, corrosion, or secure seating.

3. 3

   Check the drain pan for actual water level and visually verify float switch operation if applicable.