Pr-21 — Discharge pressure sensor, free cooling refrigerant pump, circuit C

Was bedeutet Pr-21 ?

The discharge pressure sensor for the free cooling refrigerant pump in circuit C is faulty. The free cooling mode will be stopped.

• Pressure sensor is defective.
• Installation fault.
• Wiring issue.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Inspect the pressure sensor and its wiring.

2. 2

   Check for secure connections and any damage.

3. 3

   Verify the sensor reading is plausible.

4. 4

   Replace the sensor if defective and reset the alarm.