Applicable Systems
VRV IV-S
Symptoms
The air conditioner reports a reversing valve fault. The four-way reversing valve is not switching correctly.
Possible Causes
- Solenoid coil failure
- Valve body stuck from contamination
- Pilot pressure insufficient for switching
Troubleshooting Steps
- Step 1: Test the reversing valve solenoid coil
Coil shows correct resistance - Step 2: Inspect the valve body for free movement
Valve switches between modes - Step 3: Verify the pilot pressure for valve operation
Pressure is sufficient for switching
How to Reset
To reset: Repair or replace the reversing valve, then clear the fault.
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Source: Daikin Air Conditioner Service Manual, Daikin Industries Ltd.
Category: HVAC Residential
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