Alarm Z1 Too high discharge gas temperature — Persistent high discharge gas temperature

What does 5311 mean?

This alarm triggers after 3 warnings (code 5310) within 3 hours, or if the high discharge gas temperature condition persists for over 30 minutes.

• Defective discharge temperature sensor TR6.
• Suction gas overheating is too high.
• The electronic expansion valve is not regulating properly.
• Lack of refrigerant (insufficient filling or leak).

Click steps to track your progress.

1. 1

   Measure the actual discharge temperature with a thermometer and compare it to the value displayed by TR6.

2. 2

   Check the readings of sensors TR5 and JR0 against external measurements and refrigerant pressure.

3. 3

   Test the electronic expansion valve's operation by manually adjusting its position.

4. 4

   Search for refrigerant leaks and repair if found. Refill refrigerant to the correct level.