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The latest industry insights from the pros at AirReps.
Latest Post
Using the jog mode on Danfoss VFDs
Recently, we had an interesting inquiry from a customer about having a VFD go to a preset speed from a single input. In this case, that would pre-empt the speed the drive is being commanded to in normal circumstances. For example, when an exhaust fan ramps up typically by building pressure, while it really should go to full speed on a local command from a fire panel or other gas sensor. In the example above,...
AirReps
December 10, 2025
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Daikin VRV
Understanding the U4 Error Code in Daikin VRV Systems
Understanding the U4 Error Code in Daikin VRV Systems If you’re seeing a U4 error code on your Daikin Variable Refrigerant Volume (VRV) system, you’re dealing with a communication issue that needs prompt attention. This error is one of the...
Daikin VRV
Things to look for when installing a VRV System
When installing a Daikin VRV (Variable Refrigerant Volume) system, there are several key factors to consider to ensure proper installation and maximize system performance. AirReps has invested in VRV field project specialists in each of our offices to make sure...
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