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Trianco Activair R32 S700, S1200 fault ER06

Low pressure protection

Heat pump

What it means

Low refrigerant pressure protection has tripped, indicating pressure has dropped below the safe operating threshold.

Likely causes

  1. Refrigerant leak
  2. Undercharge of refrigerant
  3. Blocked EEV
  4. Low pressure switch fault

Where to start

  1. Check low pressure switch wiring
  2. Check refrigerant charge
  3. Check EEV operation

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 11), right under the answer
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Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.

From the Trianco manual for the Activair R32 S700, S1200. Check the model on the data plate before you order parts.

Other Trianco Activair R32 S700, S1200 fault codes