Fujitsu AUXG18KVLA, Service Manual

Page: 138 / 222

4-7. 4-way valve coil (solenoid coil)/4-way valve
¢
Models: AOHG36KRTA, AOHG45KRTA, and AOHG54KRTA
Check point 1. Check connection
• Check the connection of connector P60.
P
6
0
BLACK
SOLENOID COIL
4WV
1 1
3 3
BLACK
↓
Check Point 2 : Check solenoid coil
Remove P60 from PCB and check the resistance value of coil.
Resistance Value ≈ 1.97 kΩ
→ If it is Open or abnormal resistance value, replace solenoid coil.
↓
Check Point 3: Check operation of 4 way valve
Check each piping temperature, and confirm the location of the valve by the temperature difference
Heating Operation Heating Operation
AC
SOLENOID COIL
4WAY VALVE
HOT GAS
HOT GAS
ON
Cooling Operation Cooling Operation
AC
SOLENOID COIL
4WAY VALVE
HOT GAS
HOT GAS
OFF
→ If the valve location is not proper, replace 4 way valve.
↓
Check Point 4: Replace main PCB
If none of Checks 1 to 3 apply, replace the main PCB.
4-7. 4-way valve coil (solenoid coil)/4-way valve
- (03-66) -
4. Service parts information
TROUBLESHOOTING TROUBLESHOOTING