45 MBCA Ductless Unit and the “CP” Error Code
Most ductless products have all of the error codes listed in the installation and service manuals. Error codes listed in…
Tag: Ductless
Ductless Units and Compatibility Verification
There are several different types of ductless heating and cooling systems. These systems can be combined with various indoor and…
Ductless Systems: Solid vs Stranded Wire
There are many different options and advantages to using a ductless mini-split system. From new construction installation to a retrofit…
Ductless Commission/Testing In Heat Mode
Have you ever installed a mini split in the summertime? During the commission the AC would work well, but in…
The Dreaded P4 Code
Have you ever shown up to a service call on a Carrier/Bryant/WeatherMaker (Midea) ductless system and found it locked out…
38MU/40MU Crossover System
In this article, I will explain how to wire the new crossover system for 24V communication or scenario 3 using…
38MU/40MU 18/8 Low Voltage Wiring
This month, I will be covering how to properly wire a 38MU/40MU for 24V operations and setting up the DIP…
DUCKT-STRIP Wiring
DUCKT-STRIP wire is a great product for ductless units when used properly. The wire is used to power and communicate…
Because I was Inverted
For this article, I will explain how to replace the main control board on a 38MARB ductless outdoor unit. The…
The Infamous E1: Part 2
E1 fault code on Ductless equipment is communication fault between the indoor and outdoor units.When the E1 code shows up…