Check point 4. Check the solenoid coil and 4-way valve
• Solenoid coil
Remove CN30 from PCB and check the resistance value of coil. Resistance value is 2.085 kΩ
(at 20°C).
→ If it is open or abnormal resistance value, replace solenoid coil.
• 4-way valve
Check each piping temperature, and the location of the valve by the temperature difference.
If the value location is not proper, replace 4-way valve.
↓
Check point 5. Replace main PCB
If Check Point 1 to 4 do not improve the symptom, replace main PCB.
↓
End
2-33. E: 99. 4-way valve error (Outdoor unit) - (03-49) - 2. Troubleshooting with error code
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