HVH8 Compressor Troubleshooting
The HVH8 compressor operates with 3-phase variable frequency Pulse Width Modulation (PWM). To troubleshoot a fault related to the code…
Category: Technical Services
Ecobee 5 Setup for 2 stage with Dehum
One of the most popular combinations right now is the FV4 air handler with a 2 stage outdoor unit with…
Isolating the Problem in The Unit
There are many ways to diagnose problems with a unit. You can listen to the customer describe the operations of…
HVH8 Pressure Transducer Troubleshooting
A low-pressure transducer is used on the HVH8 to interpret PSIG and is used by the control board (AOC) for…
Troubleshooting Electrical Problems: Voltage and Current
Troubleshooting electrical problems in an HVAC system can feel complicated. Sometimes the problem is overlooked as a faulty part. How…
All About Heaters
At first glance, a residential strip heat kit could look intimidating. I want to break down the operation and troubleshooting…
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…
System Vu Controller Pt 3
This month we will look at setting the fan speeds and economizer with the SystemVu Controller. Before we look at…
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…
System Vu Controller Pt 2
Last month we introduced the SystemVu controller as a complete unit management system. It can be used as a stand-alone…
