- Heat pumps
- Pool heat pump
EE03
AstralPool EE03 on pool heat pump: water flow failure
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On the AstralPool APH3 Inverboost, EE03 means a water flow failure detected by the flow switch (TS1). Check that the filter pump is running and that the filter and pipework have no air or blockages.
Safety first
Stop and check this first
- Water and electricity: AstralPool says to always cut the power before opening the cabinet. Do not open the unit to reach the flow switch.
- In winter or below 0 °C, drain the water from the heat pump: AstralPool warns that freezing damages the titanium exchanger and voids the warranty.
Safe checks you can perform
- Filter pump running
- Clean filter and no air in the circuit
- By-pass valves open as installed
- Unit response when the filter pump stops
Leave these tasks to a qualified professional
- Do not attempt this professional task: Checking the flow switch wiring and setting
- Do not attempt this professional task: Checking flow against the advised figure
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Checking the flow switch wiring and setting
What they doWith the unit isolated, the technician checks the flow switch wire, refits it or replaces the flow switch, and sets it so the unit stops when flow is cut.
They must show youthe unit stopping when the filter pump is switched off and starting with flow.
In writingwhether the flow switch was adjusted, reconnected or replaced, with its part number.
Checking flow against the advised figure
What they doThe technician checks the water circuit, looks for air or blockages and compares the flow with the advised water flow the manual gives for your model.
They must show youthe measured flow or pressure against the model figure.
In writingwhat was found in the circuit and what was corrected.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Filter pump running
- Who:
- you, no tools.
- How:
- check that the filter pump is running and water returns to the pool. AstralPool warns that the heat pump will not start if water is not circulating.
- Result that matters:
- water circulating through the heat pump.
- If the filter pump was off:
- switch it on and wait; the unit has a 3-minute start-up delay.
- If the filter pump runs and EE03 stays:
- check the filter and pipework.
- Evidence to keep:
- time of the alert and whether the filter pump was running.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Clean filter and no air in the circuit
- Who:
- you, no tools.
- How:
- empty the skimmer and pre-filter baskets, read the filter gauge and check that the water level covers the skimmers. AstralPool asks you to check the water circuit so no air gets in and to clean the pool and filtration to avoid a clogged filter.
- Result that matters:
- a clean filter, a pre-filter full of water and no bubbles at the return jets.
- If there was air or a dirty filter:
- fix it and wait for the unit to start.
- If everything is fine:
- check the by-pass valves.
- Evidence to keep:
- filter gauge reading and photo of the pre-filter.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
By-pass valves open as installed
- Who:
- you, looking only; adjustment is for the installer.
- How:
- look at the inlet, outlet and by-pass valves. AstralPool says the by-pass kit is used to set the optimum flow; if someone moved them, water may not pass through the heat pump.
- Result that matters:
- inlet and outlet open and the by-pass where the installer left it.
- If one was closed or moved:
- return it to its original position or ask the installer to set it.
- If they are fine and EE03 continues with normal flow:
- it may be the flow switch.
- Evidence to keep:
- photo of the valves as you found them.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Unit response when the filter pump stops
- Who:
- you, without opening the unit.
- How:
- with the heat pump running, switch off the filter pump. AstralPool says the heat pump should stop by itself; if it does not, the flow switch needs adjusting.
- Result that matters:
- knowing whether the flow switch reacts to flow.
- If it stops without flow and starts when flow returns:
- the switch reacts; keep an eye on flow.
- If it does not stop or never starts:
- the flow switch needs a technician.
- Evidence to keep:
- note of what the unit did when the filter pump stopped and started.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Heat pumps
- Brand
- AstralPool
- Product type
- Pool heat pump
Known code variants
- APH3 Inverboost EE03
- AstralPool EE03
- AstralPool fallo de caudal de agua
- AstralPool Heat EE03
- AstralPool heat pump no flow
- AstralPool water flow failure
- bomba de calor AstralPool sin caudal
- E03
- EE03
What it means
AstralPool defines EE03 as water flow failure (TS1). The heat pump has a flow switch that lets it run only with adequate flow: it turns on when the filter pump starts and stops the unit when the pump stops. The manual gives two causes: a loose flow switch wire or a damaged flow switch, and no or insufficient water flow. The second is checked at the filtration side, looking for air or blockages in the circuit. So the code does not prove the flow switch is broken: first confirm that water is flowing.
Warnings and stop conditions
- Highsource verified
Water and electricity: AstralPool says to always cut the power before opening the cabinet. Do not open the unit to reach the flow switch.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
- Mediumsource verified
In winter or below 0 °C, drain the water from the heat pump: AstralPool warns that freezing damages the titanium exchanger and voids the warranty.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Symptoms and causes
Probable causes · in order
- No or insufficient water flowCommon
The filter pump is stopped, the filter is dirty or there is air or a blockage in the pipes; once flow is back the unit restarts.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
- Loose flow switch wire or damaged flow switchPossible
Water flows normally but the flow switch sends no signal; confirmed by checking its wiring or testing it with the unit isolated.
Evidence: AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Virtual technician
Does EE03 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
AstralPool APH3 Inverboost (R32) swimming pool heat pump: user and service manual
Fluidra (AstralPool) · 2021 · official_doc
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