Fujitsu GENERAL AOHG18KMTA, Service Manual

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Check point 3. Check the solenoid coil and 4-way valve
NOTE: Refer solenoid coil and 4-way valve in "Service parts information" on page 03-48.
• Solenoid coil
Remove P60 from PCB and check the resistance value of coil. Resistance value is 2.780 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 4. Replace main PCB
If Check Point 1 to 3 do not improve the symptom, replace main PCB.
End
2-30. E: 99. 4-way valve error (Outdoor unit)
- (03-36) -
2. Troubleshooting with error code
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G