How to Check the CTB During a Cooling Call
The CTB (central terminal board) is a board that is often replaced unnecessarily. A CTB is simply a junction board…
Tag: split systems
Scrolling Marquee Basics and Resetting Error Codes
On units that are equipped with a ComfortLink controls package, the user interface for the machine will include a Scrolling…
Where Does the Orange Wire Go On a Carrier Commercial Heat Pump?
Model numbers that this document pertains to: 38AUQ/40RUQ, 50FCQ, 50GCQ, 50HCQ, 50KCQ, 50TCQ No matter how long you have been…
ABB Drives: How to Set Up on a Light Commercial System
Commercial HVAC Have you seen an ABB Variable Frequency Drive or VFD for short? Odds are if you have installed…
Easy Select Board in FV4 Fan Coils
The easy select board is used in the FV4 HVAC fan coil to configure the ECM motor to modify its…