View Full Version : Fujitsu Cassette problem

07-11-2016, 09:32 AM
Hi Guys,

I have a Fujitsu cassette A/C with an issue.
Model: Indoor AUT30RLD-W Outdoor AOT30RMBL
When the unit is turned on it runs fine for 10-20 mins cooling good.
Indoor fan runs fine, the compressor and fan in the condenser come on and run as well.
The filter is clean etc.
After the 10-20 mins of fine operation the LCD wall control faults out with EE:EE.

My question is: How to retrieve the fault code from this model, and the relevant fault codes.

Many Thanks,

Slim R410a
07-11-2016, 09:53 AM
To Interrogate
When E:EE is displayed switch unit off and press the temp up and temp down
buttons simultaneously for 3 seconds.

OO ID to RC Comms Fail
O1 ID to OD Comms Fail
O2 ID Air Sensor Open
O3 ID Air Sensor Close
O4 ID Pipe Sensor Open
O5 ID Pipe Sensor Close
O6 OD Pipe Sensor Fail
O8 Power Source Connection Failure
O9 Drain Problem Float switch operated
OA OD Air Sensor Fail
OC Discharge sensor Fail
OE Outdoor High Pressure Heatsink error
11 OD PCB Fail
12 ID Fan Fail
13 OD Signal Abnormal ID signal error
15 Compressor Temp Failure
16 Pressure Switch Error
17 IPM Error
18 CT Error
19 Active Filter Module Error
1A Compressor Failure
1B OD Fan Failure
1C Inverter to PCB Comms Fail
1D 2 Way Valve sensor Fail
1E Expansion Valve Error
1F Connection ID Unit Error
20 Indoor manual switch abnormal
24 Excessive high pressure protection on cooling

25 PFC circuit error
26 Indoor signal error
27 Indoor signal error
28 Indoor heat exchanger temperature error
29 Outdoor heat exchanger temperature (middle) error
2A Power supply frequency detection error
2B Compressor temperature error
2C Four-way valve abnormal

07-11-2016, 10:32 AM
Thanks mate will try that on site tomorrow

07-11-2016, 07:39 PM
Don't switch the power off or you will lose the error code...just switch the unit to Off on the controller

08-11-2016, 05:11 AM
could be a condensate pump problem.

08-11-2016, 08:34 AM
Hi guys,
Thanks for all answers

Just an update.
Got the error code- E:00- Communication error between indoor unit and controller.
I called Fujitsu tech support got thier test sheet emailed to me.
Checked for 12v dc between 1 and 3 terminal on wall controller= yes
Checked for fluctuating 7v-12vdc between terminal 3 and terminal 2 on the wall controller with the cable from the indoor unit disconnected from terminal 2= yes
Checked for fluctuating 7v-12vdc between terminal 3 and the disconnected wire from the indoor unit from terminal 2= No
This brings my attention to the indoor unit.
Checked condensate pump, tested for a circuit through its plug as advised by fujitsu.
Checked fan motor windings
Checked thermistors to have no open circuits.
Checked fan capacitor
My final conclusion is that it's an intermittent fault with the indoor control board.
The unit runs fine for 10-20 mins then faults out.
The cable to the controller is also shielded and earthed at the indoor unit.

Such a tricky fault.

Let me know your thoughts guys.


20-01-2017, 11:51 AM
Got the go-ahead from the client to replace the indoor control board. Unit now working like a dream.