Heat pump shutting off and flashing hp5 code

by Jeff
(Punta gorda Florida )

Heat pump won't remain running

Comments for Heat pump shutting off and flashing hp5 code

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Jun 14, 2017
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HP5
by: Cool Runnings

Aquacal heat pumps cannot cool the pool when temps are above 105, will cause HP5, WHEN HEATING AND YOU GET HP5 check for water flow restrictions.

Jul 25, 2016
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Hp5
by: Anonymous

Heat pump shutting off and flashing hp5 code Model sq166r but in the night or early morning working great , what to do , it's almost 6 months old and I just used a month ago

Jul 25, 2016
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Jan 01, 2016
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Code HP5
by: Anonymous

I turned my unit off and waited a couple of seconds and turned it back on and it restarted. Hope it stays on.

Oct 12, 2013
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Solution
by: Anonymous

Ok, I don't recommend this unless you are a licenced electrician.
Inside the controller there is a small circuitboard at the top. On this board there is are contacts labelled HP. These contacts go to the switch that is broken. Un plug the two leads and replace with a short jumper lead between these contacts. The error will go away. This now means you will not know when the unit has a genuine fault with the refrigerant pressure, but it will get the heater working in the interim.

Sep 24, 2013
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Result
by: Kev

The refrigerant switch was the problem when my heat pump displayed that code.

Oct 12, 2012
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Aquacal Heat Pump HP5 code
by:

I am assuming that you are talking about an Aquacal pool heat pump, as this is the only heat pump that I know of that flashes an "HP5" code.

The HP5 troubleshooting code tells you that there has been 5 high pressure faults within one call for heating or cooling. In other words, the heat pump tries turning on 5 times, but doesn't because it senses an abnormally high discharge refrigerant pressure. Once this abnormal pressure is sensed five times, the heat pump locks out and does not turn on.

Most commonly this happens when there is no or low water flow to the heat pump. So check to see if something is restricting water flow (clogged strainer, kinked line, etc.) or if the water pump isn't turning on; it could be a water pump problem.

If this isn't the problem, sometimes the high pressure switch itself is bad or the wiring/terminals that connect the high pressure switch to the control relay is faulty.

If the above causes are ruled out, a heat pump or refrigeration technician may need to take a look at it.

Let us know if this helped!!!

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