Fujitsu AUXB04GALH Service Manual page 147

Trouble shooting 59
OUTDOOR UNIT Error Method:
Coil 3 (EEV) Error
Detective Actuators:
Main PCB
Forecast of Cause :
1. EEV3 coil loose connection
3. Defective EEV3 coil
Check Point 1 : Check the connection of EEV connector
Check if the connector CN160 is loose connection or not.
OK
Check Point 2 : Check the EEV wire
Check if the wire of EEV3 has damage or not.
(Slash, Braking of wire, Pinching, etc.)
OK
Check Point 3 : Check the EEV Coil
Check if the circuit of EEV3 coil winding is good or not.
(Refer to the service parts information 16.)
OK
Check Point 4 : Check the output of EEV on the Main PCB
Check if the DC12V is on between the Pin No.1 of CN160
and Pin No.2 of CN132 (GND).
(Disconnect the wire of EEV3 when you check the output of EEV3)
OK
Check Point 5 : Noise, momentary open, voltage drop
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly
or there are no related cables near the power line.
Indicate or Display:
E9A.3
Outdoor Unit : E. 9 A. 3
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 9 A
Detective details:
Coil 3(Expansion valve 3) driver circuit open detected.
2. EEV3 wires cut or pinched.
4. Main PCB (DC12V) output abnormal
04-71
Filter LED Continuous Flash.
Replace EEV3 Coil
NG
Replace EEV3 Coil
NG
Replace Main PCB
NG