Bonaire model BHW SO - 70 with remote control flashing error EO

You can check the wiring but this looks like an incompatible controller. Here are some alternatives:

If you're looking to purchase an Evaporative Cooler Vulcan Touchpad Controller, there are several options available. Here are some places where you can buy one:

The Home Depot: You can purchase a DIAL Evaporative Cooler Digital Controller from The Home Depot for $64.48.
Gasstop: Gasstop offers a refurbished wired Bonaire Comfort Control remote that works with Bonaire and Vulcan gas central heating systems for $150.
Bonaire Heating & Cooling: Bonaire offers a range of Navigator Remote Controls for Cooler and Heater, including My Climate® Wi-Fi® for ducted evaporative cooler, ducted gas heater, or dual-cycle air conditioner.

Navigator Remote Control for Cooler and Heater (bonaire.com.au)

here is a link to manual. if you are renting call bld. maintenance


https://www.manualslib.com/manual/639673/Bonaire-Bonaire.html#manual

An EO error indicates an electronic error caused by either a control board problem or a problem with supply voltage to the heater. A single EO code is not cause for concern, but for repeated EO codes

1
Turn the power switch on your Bonaire Comfort system "Off" and immediately turn it back to the "On" position.
2
Press and hold the "Heat/Cool/Fresh Air" and the "Off" button at the same time. ...
3
Change each digit using the directional keys below the power button. ...
4
Wait 15 seconds and the word "Code" stops flashing.

https://www.searspartsdirect.com/model/search.html?q=FFRE06B3Q1

Not sure what the problem is but if you have a (apple or Droid) smartphone you might want to search your app store for Ac/Heater Remote applications. Bonaire might even have their own. Then you can at least tell if the issue is with your remote or your appliance (for free). Best case is you can control your appliance with your smartphone.

If you wish to get more information, check these links. Setup procedure, and setup code list to many popular remote controls are given. Pull up older posts.
http://electro-medical.blogspot.com/
http://electrohelponline.blogspot.com/

27,25,20,26 are the codes to check with. If you wish to get more setup codes, three digits, four digits or five digit ones, check this link. Pull up older posts. Setup code list and setup instructions to some popular model remote controls are given.

Signal transmitting/receiving
error
(Indoor controller does not
respond to remote controller
signal.)
During individual unit control
1) Bad contact of transmission
wire
2) Signal transmitting/receiving circuit
is abnormal.
1) Check the transmission wire.
2) Check with another remote controller. If "EO" is
still indicated, replace the indoor controller
board.
If other check code appears. replace the original
remote controller.
P3 Signal transmission error
(Remote controller does not
respond to indoor controller
signal.)
1) Bad contact of transmission
wire
2) Signal transmitting/receiving circuit
is abnormal.
3) Wrong operation due to noise
wave emitted

go to www.bonaire.com.au for manual