Daikin air conditioner U4: what it means and when to call a pro · Iran
Severity: Stop nowDaikin air conditioner error U4. Communication fault between the indoor and outdoor units (or with the remote), usually caused by a wiring, connection or control board problem.
Meaning
Communication fault between the indoor and outdoor units (or with the remote), usually caused by a wiring, connection or control board problem.
Severity
Stop now
Stop. Switch it off and call a pro
Steps are not shown for this code because no qualified person has reviewed them yet. What is safe: switch it off and call a pro.
Source
Daikin Error Codes, Daikin Airconditioning India Pvt. Ltd.
The repair: Air conditioner error code repair
Prices for repairs in Iran are in IRR.
Other Daikin codes
- Daikin A1 A1 means the indoor unit's control board has reported a fault.
- Daikin A3 The condensate drain is blocked or the water level in the drain pan is too high, which can cause water to leak from the unit.
- Daikin A5 A protection has triggered, usually from icing or overload.
- Daikin A6 A fan motor fault: the unit has detected a problem with its fan motor.
- Daikin C4 A temperature sensor circuit is reporting a fault, usually a failed sensor or a wiring or connection problem in its circuit.
Brands in our catalog for air conditioner: Daikin, LG, Samsung. The same code on another brand is not in the catalog yet, and we do not guess what it means.