Fujitsu ABHG18KRTA, Service Manual

Page: 273 / 471

2-39. E: 9A. Coil 1 (expansion valve 1) error
Indicator Indoor unit
Operation indicator 9 time flash
Timer indicator 10 time flash
Economy indicator Continuous flash
Error code E: 9A
Detective actuator
EEV coil
Coil (Expansion valve) driver circuit open detected.
Main PCB
Forecast of cause
EEV coil loose connection
EEV wires cut or pinched
Defective EEV coil
Main PCB (DC 13 V) output abnormal
Check point 1. Check the connection of EEV connector
Check if the connector is loose connection or not.
↓
Check point 2. Check the EEV wire
Check if the wire of EEV has damage or not. (Slash, Braking of wire, Pinching, etc.)
→ If it is abnormal, replace EEV coil.
↓
Check point 3. Check the EEV coil
Check if the circuit of EEV coil winding is good or not. (Refer to "Service parts information" on page
03-83.)
→ If it is abnormal, replace EEV coil.
↓
Check point 4. Check the output of EEV on the main PCB
Check if the DC 13 V is on between the Pin No.1 of P30, PA30, PC30, PD30 and PE30 and GND
Pin. (Disconnect the wire of EEV when you check the output of EEV.)
→ If it is abnormal, replace the main PCB.
↓
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.
↓
End
2-39. E: 9A. Coil 1 (expansion valve 1) error
- (03-57) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING