Samsung Heat pump fault E443
No startup due to low pressure
Heat pumpWhat it means
Compressor/system fails to start due to detected low refrigerant pressure.
Likely causes
- Low refrigerant charge
- Blocked refrigerant circuit
- Low pressure switch fault
Where to start
- Check refrigerant pressure prior to startup
- Open charging ports on low pressure side
- Open low pressure side valve in manifold gauge
The full answer, free
- 1 more check in order
- How to put it right, step by step
- The manual page for this fault (page 84), right under the answer
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 Samsung manual for the Heat pump. Check the model on the data plate before you order parts.
Other Samsung Heat pump fault codes
- E108Setting address duplicate error
- E201CONTROL KIT / outdoor UNIT communication error (matching error)
- E202CONTROL KIT / outdoor UNIT communication error
- E203Communication error between INVERTER and MAIN MICOM (6 min)
- E205Communication error between outdoor unit inv micom - fan motor micom
- E458Outdoor unit fan error
- E507Comp down due to high pressure or high pressure switch open
- E563INDOOR UNIT mixed install error
- E904Water tank sensor short/open
- E906Outdoor EVA in sensor error
- E907Pipe rupture protection error
- E910Water temperature sensor detached
- E911Minimum water flow rate not met
- E912Flow switch close error
- E913Flow switch error detected six times (re-operation impossible)
- E914Incorrect thermostat connection
- E915DC fan non-operating
- E916Mixing sensor short/open