U7-00" - Transmission Outdoor Unit-Outdoor Unit Abnormality; Ua-00" - Improper Combination Of Indoor Unit And Outdoor Unit - Daikin FTXJ-M Service Manual

ESIE16-02K | Part 2. Troubleshooting
Possible cause
Faulty wiring.
2.2.3.6. "U7-00" – Transmission outdoor unit-outdoor unit abnormality
Trigger
Communication abnormality between out-
door unit PCB's.
Possible cause
Faulty wiring between outdoor unit PCBs.
Faulty outdoor unit main PCB.
Faulty outdoor inverter PCB.
More info:
Check procedures
2.2.3.7. "UA-00" – Improper combination of indoor unit and outdoor unit
Trigger
Signal transmission between indoor unit
and outdoor unit abnormality.
Possible cause
Improper combination of indoor unit and
outdoor unit.
Wiring abnormality between indoor unit
and outdoor unit.
Faulty outdoor unit main PCB.
Page 42
RA R32 Split & multi split M-Series
Check
Double check if the wiring is correct. It can
be that the connector is the same but not
the cables. Use the cable who comes with
the controller.
Effect
Unit will stop operating.
Check
Check wiring between outdoor unit PCBs.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check outdoor inverter PCB.
Check if the alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Replacing procedures
"Replacing main PCB" on page 85
Effect
Unit will stop operating.
Check
Check combination.
Check wiring between indoor unit and out-
door unit.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
2.2. Error based troubleshooting
Corrective action
Correct wiring.
Reset
Manual reset via user interface.
Corrective action
Adjust wiring between outdoor unit PCBs
when required.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB.
Reset
Power reset via outdoor unit.
Corrective action
Adjust installation when required.
Adjust wiring between indoor unit and out-
door unit when required.
Replace wiring between indoor unit and
outdoor unit when required.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
31/05/21 | Version 1.1