Applicable Systems
VRV IV-S
Symptoms
The air conditioner reports a communication fault. The data link between indoor and outdoor units is lost.
Possible Causes
- Communication cable disconnected or damaged
- Communication circuit board fault
- Address or protocol mismatch between units
Troubleshooting Steps
- Step 1: Check the communication cable connections
Connections are secure - Step 2: Verify the communication board status
Board shows normal operation - Step 3: Check the unit address settings
Addresses are unique and correct
How to Reset
To reset: Restore the communication link, then reset both units.
Comments (0)
Share your experience to help others facing the same problem.
Leave a Comment
Source: Daikin Air Conditioner Service Manual, Daikin Industries Ltd.
Category: HVAC Residential
No comments yet. Be the first to share your experience!