Check point 3. Check the solenoid coil and 4-way valve
• Solenoid coil
Remove CN30 from PCB and check the resistance value of coil. Resistance value is about1.4
kΩ.
→ 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 4. Check the voltage of 4-way valve
Check the voltage CN30 of Main PCB.
→ Check if AC 198 V (AC 220 V -10%) to AC 264 V (AC 240 V +10%) appears at CN30 of Main
PCB.
• Heating operation
→ If it is not voltage, replace the main PCB.
• Cooling operation
→ If it is voltage, replace the main PCB.
↓
Check point 5. Replace the main PCB
If Check Point 1 to 4 do not improve the symptom, replace the main PCB.
↓
End
2-38. E: 99. 4-way valve error (Outdoor unit) - (03-56) - 2. Troubleshooting with error code
TROUBLESHOOTING
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