Air Conditioner HHH Error Code on a MarineAire

[Jduncan99217]

Hello,

Does anyone know the common causes and solutions to get the error code HHH to go away?

So far I have checked the following:
- Sea Strainer cleaned
- Water flow confirmed
- Coils cleaned
- Fan free spinning
- Motor warm (hot) to touch when operating for a period of time

What other things are there to check?

Thank you in advance for any additional things to check.

[mmwjr]

Typically this is an issue with the water flow rate being marginal.

[shrew]

An HHH error code on a marine air conditioner typically means High Head Pressure (or High Pressure Fault), which happens when the system gets too hot and cannot release heat properly.

Common Causes:

Low Seawater Flow: The most frequent cause is a lack of raw water cooling the system. Check that your thru-hull sea cock is fully open, the sea strainer is clean and free of debris, and the raw water pump is running.

Clogged Air Filter: Restricted airflow across the cabin air filter can strain the unit and cause high-pressure faults.

Failed Sensor or Trigger: A faulty pressure switch, bad sensor, or a failing pump relay/trigger box can falsely trigger the code or prevent the cooling pump from activating.Refrigerant

Overpressure: Less commonly, an overcharged refrigerant system can cause high pressure, usually only occurring if it was recently serviced.

[HavreDeGrace2400]

My Marine Airrr system calls an error code occasionally when the water tubes get clogged. I run mine 24x7 so this happens to me once a year. I have to flush it with a hose to clear mud.

I dont recall the error code it reports when this happens.