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Daikin 2MXS18NMVJU Service Manual

Daikin 2MXS18NMVJU
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SiUS121736EA Troubleshooting for RA Indoor Unit
Service Diagnosis 160
5.6 Signal Transmission Error (Between Indoor Unit and
Outdoor Unit)
Error Code U4
Method of Error
Detection
The signal transmission data from the outdoor unit is checked whether it is normal.
Error Decision
Conditions
The data sent from the outdoor unit cannot be received normally, or the content of the data is
abnormal.
Supposed
Causes
Reduction of power supply voltage
Wiring error
Breaking of the connection wires between the indoor and outdoor units (wire No. 3)
Defective outdoor unit PCB
Short circuit inside the fan motor winding
Defective indoor unit PCB
Disturbed power supply waveform

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Daikin 2MXS18NMVJU Specifications

General IconGeneral
Cooling Capacity5.0 kW
RefrigerantR-32
Power Supply220-240V, 50Hz
Number of Connectable Indoor Units2
TypeMulti Split
Energy Efficiency Ratio (Heating)11.2 BTU/W
Seasonal Energy Efficiency Ratio (SEER)6.10
Indoor Unit Noise Level19 dB(A)
Indoor Unit Dimensions (WxHxD)Varies depending on the connected indoor unit model
Indoor Unit WeightVaries depending on the connected indoor unit model

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