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Home / External condensate pump with HD55S dehumidifier

External condensate pump with HD55S dehumidifier

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I have an Everbilt external condensate pump I am using with an alot air HD55S and am trying to wire the pumps overflow safety switch terminals to the HD55S. I think they are supposed to go into the A5/A6 terminals on the HD55S but am not sure.

The pump's wires are yellow and labeled "COM" and "RUN" ("Overflow Swrich 24V 1A Max"). The pump model # is EB-PUMP-T (Everbilt).

Do I just plug these wires right into the A5/A6 terminals and that's it?

Asked on Jul 31, 2023 - 08:01:20am
Christopher
Answers

Alorair

Hi Christopher,

A5 and A6 are the water pump signal interfaces. Can not directly 24V water pump, the HD55 motherboard does not have a 24V/1A power supply.

 

Christopher

Hi - Thanks for your reply.  To be clear I am not trying to power the pump with these wires, these wires are meant to act as a shutoff switch for whatever the pump is connected to (A/C unit, dehumidifier, etc.) in the event the pump fails and the water level inside of the pump gets too high.  I think that is the purpose of the A5/A6 terminals, but i'm not sure.  Can you elaborate what yea mean by "Can not directly 24V water pump"?

Christopher

A little more information:  The pump's user guide says, "A pump safety switch should be used on 24V Class II control circuits only".  But the label on the pump's safety switch wires says "OVERFLOW SWITCH 24V 1A Max".

Alorair

Hi Christopher,

A5/A6 is the signal interface for the water level switch. When connected, the machine stops its operation to prevent overflow in case of abnormal discharge. A5/A6 can only be connected to the water level switch line and cannot be used as a pump power interface.

Christopher

Hi,

So I tried connexting these wires from the condensate pump to the HD55S A5/A6 terminals and within a few seconds I got an "E4" code and very soon thereafter the HD55S seemed to start shutting itself off. However I don't think the condensate pump was overfilling or anything. What does this mean? Thanks!

Alorair

Hi Christopher,
A5\A6 is connected to the water level switch, not the water pump. Please make a video and provide it to confirm if the wiring method is correct, thanks!
 

Email : yoky@alorair.com

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