Applicable Systems
VRV IV-S
Symptoms
The air conditioner reports excessive discharge temperature. The compressor discharge temperature exceeds the safety limit.
Possible Causes
- Refrigerant charge low causing high superheat
- Condenser airflow restricted
- Compressor mechanical wear increasing compression ratio
Troubleshooting Steps
- Step 1: Check superheat and refrigerant charge
Values are within specification - Step 2: Verify condenser fan operation and coil cleanliness
Condenser operates at full capacity - Step 3: Check for refrigerant leaks and recharge
System charge matches specification
How to Reset
To reset: Lower the discharge temperature, then reset the protection.
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Source: Daikin Air Conditioner Service Manual, Daikin Industries Ltd.
Category: HVAC Residential
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