There is no display on my heat pump's remote controller - what can I check?

The Aerona³ Remote Heat Pump Controller has a LCD display which illuminates when the front cover is opened and it will display key information relating to your heat pump’s operation and the wider system. The Controller is directly attached to your Aerona³ heat pump via a 2-core flexible lead (cable) that is supplied with the unit. This lead is connected between the controller (located inside your home) and the terminal PCB (in the heat pump) during installation.

If your Aerona³ Remote Heat Pump Controller has a blank display, this could be the result of one of the following reasons:

No electrical supply to the heat pump

If there has been a loss of electricity supply to the heat pump, this will cause the display on the Remote Controller to go blank. This could be as a result of a power cut to your property so check to see if there is power loss to other appliances within your home. You can also check that there is no tripped circuit breaker or blown fuse in the property’s consumer unit or fuse board. If you are in any doubt, you should seek the support of your heating engineer.

If you or your engineer can ascertain that the electrical supply to your heat pump is not disrupted, the reason why your remote controller’s display is blank may be due to another cause as outlined below.

The external isolator is set to OFF

The external isolator, also known as the rotary isolator, will be located on the outside of your property near to your heat pump. This is designed to make and break the power supply to the heat pump - if the switch on this isolator is positioned to ‘OFF’, this will break the power supply to your heat pump and cause your remote controller’s display to be blank.

The external isolator is shown here in the image below. If the switch is positioned to ‘OFF’, please contact your heating engineer.

A poor or broken connection at either end of the connecting lead

This occurs either at the controller terminals or terminals 1 and 2 on the terminal PCB in the heat pump. Your heat pump installer or engineer will need to refer to the Aerona³ installation instructions for further guidance.

Does a heat pump still work if the display is off?

No. If the display on your remote controller is off and not working, the heat pump will not be able to operate. If the screen, for any reason, goes blank during operation, the heat pump may run for a short period of time before stopping and displaying a fault on the heat pump’s terminal PCB (located inside your heat pump unit).

The information provided here is advice only - if you are not happy to check your product, please contact a heating engineer to assist.

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