Fujitsu Error Code E0:00: Communication Error (Indoor to Remote)
How to Fix Fujitsu Code E0:00
- Step 1: Replace the batteries in the remote controller with fresh ones.
- Step 2: Ensure there are no obstructions (furniture, curtains, etc.) blocking the path between the remote and the indoor unit.
- Step 3: Try using a different compatible Fujitsu remote if you have one available. If a different remote works, the original remote is likely the problem.
- Step 4: If none of these steps work, it's time to call a qualified HVAC technician to diagnose the problem further.
How to Reset Fujitsu Code E0:00
- Turn off the unit using the remote control or wall controller.
- Turn off the circuit breaker for the outdoor and indoor units. Wait 60 seconds.
- Restore power at the breaker.
- Turn the unit on with the remote control. If the error returns, the fault needs professional diagnosis.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Fujitsu Error Code E0:00 Mean?
The E0:00 error code on your Fujitsu mini-split system indicates a communication problem between the indoor unit and the remote controller. Basically, the indoor unit isn't receiving signals from the remote. This could be due to a few different things, but it prevents you from controlling the system, and the unit will likely stop working until the issue is resolved. This communication relies on a wired or wireless connection, depending on your setup. The error could stem from a faulty remote, a problem with the receiver in the indoor unit, or issues with the wiring or wireless signal itself. Because mini-splits are ductless, this won't affect other parts of your home, but you will need to troubleshoot to get your AC or heat back.
Common Causes
- Dead batteries in the remote controller.
- Obstructions blocking the remote's signal to the indoor unit.
- Faulty remote controller.
- Wiring issues between the indoor unit and the remote receiver (for wired remotes).
- Defective receiver board in the indoor unit.
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Remote batteries are new, and the unit still doesn't respond | Check the remote control signal with an IR detector or smartphone camera (you should see the IR LED blink when a button is pressed) | Visible IR signal |
| No IR signal from the remote | Inspect the remote control PCB for corrosion or damage | Clean PCB with no visible damage |
| Wired remote is used | Check the wiring connections between the indoor unit and the remote receiver for loose connections or damage. | Secure and undamaged wiring |
| Wiring is good, but still no communication | Measure the voltage at the remote receiver on the indoor unit. Refer to the service manual for the correct pins and voltage. | Specified voltage (e.g., 5V DC) |
Applicable Fujitsu Models
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Remote Controller | UTY-LBTGM | — | Find Part |
| Indoor Unit Receiver Board | — | — | — |
| Communication Wiring | — | — | — |
Related Codes on Same Models
Other codes that affect the same Fujitsu model families as E0:00.
| Code | Description | Severity |
|---|---|---|
| E1:00 | Communication Error (Indoor to Outdoor) | Warning |
| E2:00 | Room Temp Sensor Open Circuit | Warning |
| E3:00 | Room Temp Sensor Short Circuit | Warning |
| E4:00 | Indoor Coil Sensor Open | Warning |
| E5:00 | Indoor Coil Sensor Short | Warning |
| E6:00 | Outdoor Coil Sensor Fault | Warning |
| E7:00 | Outdoor Ambient Sensor Fault | Warning |
| E8:00 | Indoor Fan Motor Fault | Warning |
| E9:00 | Drain Pump / Float Switch | Warning |
| EE:00 | Communication Error (Multi-System) | Warning |