Daikin mini_split Error Code A5

What does A5 mean?

Evaporator coil temperature sensor detected coil icing. System went into freeze protection mode.

Common causes

• Dirty air filter restricting airflow
• Fan motor speed too low
• Low refrigerant charge
• Outdoor temperature too low for cooling operation

Diagnostic & testing steps

1. 1. Check and clean air filter
2. 2. Allow ice to melt before restarting
3. 3. Verify indoor fan runs at all speed settings
4. 4. Check refrigerant charge if problem persists
5. 5. Inspect indoor coil thermistor

Tools required

• Multimeter
• Thermometer

OEM parts & part numbers

Indoor Coil Thermistor, Air Filter, Indoor Fan Motor

Part numbers: 2503220