How to Fix the Exhaust Fan of VRV Outdoor Unit?

Are you also getting stuck after your VRV Heating & Ventilation Air Conditioning Outdoor Exhaust fan suddenly stopped working. Then the following article just for you, where we discuss the issue behind the problem of Exhaust Fan and Way to Fix the Exhaust Fan of VRV Outdoor Unit.

What is the Reason Behind VRV Outdoor Exhaust Fan Suddenly Stuck?

For a sudden outdoor exhaust fan failure are major reasons behind it which have electrical or mechanical issues. Let’s count the most common and effective error reasons behind VRV Outdoor fans.

1. Fan Motor issue

   • The fan motor malfunction or failure is the most common technical cause. This may be as a result of a broken wire/ short circuit or the disconnection of the harness/ connector between the fan motor and the PCB (Printed Circuit Board).

   • The faulty wiring, connections that are overloaded or failed capacitors may also lead to malfunctioning of the fan. Electrical issues must be dealt with in time before they manifest into a worse state.
     

2. Obstruction by Outer Objects

   • If there is some foreign matter (debris, leaves, insects, etc.) caught between the blades, then the fan will not turn mechanically.

   
   

3. Detects in Connectors

   • Loose or defective connector contact between the fan motor and the PCB may interrupt either power or signal and the fan will stop.

4. Problem by Period of Installation

   • Fans can seize up if there is too much dirt, dust or environmental conditions (exposure to salt air) that might speed up mechanical problems.

   • Errors in installation and in new systems in particular may also lead to the fan not working properly

These are the most common factors of VRV System’s Outdoor Exhaust Fan Error. Most of the time owners thing it was a small problem and they can’t give any efforts to fix it for at least period of time & that thing sometimes affects the whole Variable refrigerant Volume System.

Ways to Fix the Exhaust Fan of VRV Outdoor Unit

Before discussing the step by step process and factors where we need repair or maintenance I have to suggest something - Always in that kind of situation firstly contact your installer because they guarantee the system while installing. And if your AMC - Annual Maintenance Contract under which your system guarantee comes expires then you should contact Ventac Aircon HVAC Company in Delhi NCR if you lived in the region of Delhi, Gurgaon, Noida.

Now there step by step procedure to repair or maintain the Exhaust VRV Outdoor Fan Error:-

1. Shutdown the System

   • Never do any inspection or repair on the unit while the power is ON. Wait for at least ten minutes after it has been switched off so that there is no residual voltage in the system.
     

2. Visual Inspection

   • Check for any visual obstructions like debris and leaves,or foreign items stuck in the fan blades. Remove any blockage carefully.

3. Verify the Electrical Connections

   • Inspect the wiring and connectors between the fan motor and the (PCB) Printed Circuit Board. Poorly connected wires or loose wires are a common source of malfunction.

   • Make sure that connectors are tightly fixed and free from corrosion.

4. Test the Fan Motor

   • You are able to test the five-wire fan motor of Daikin VRV units by removing its plug from the PCB (with the unit turned off and discharged).

   • Test of the resistance across the motor terminals with the help of a multimeter following the service manual. Faulty motors that need replacement can be indicated through abnormal readings.
     

5. Replace the Faulty Components 

   • If the fan motor, PCB etc experimental tests come out bad replace it with a genuine spare part. Use the unit’s service or installation manual for the part numbers and replacement procedures.

Conclusion

All in all, a VRV outdoor exhaust fan can fail due to motor problems, faults in the electrical connections, obstructions or flaws in the installation. If you follow the shutdown procedures and check visually and electrically, test motors and replace faulty parts, you can fix most of the common problems. For the long-term problems, always seek help from a qualified HVAC technician or your system installer.