Daikin Fault

[rasper]

Has anyone any information on what a (uf) fault on a daikin vrv3 system and any way of fixing it .

[Brian_UK]

Fault code list here...

http://www.daikinac.com/DOC/Malfunction_Code_Chart_001.pdf

[install monkey]

“UF” System is not Set yet
Remote

Controller

Display

UF

Applicable

ModeAll indoor unit models
RQYQ-PY1

PQEQ-PY1

Method of

Malfunction

Detection

On check operation, the number of indoor units in terms of transmission is not corresponding to

that of indoor units that have made changes in temperature.

Malfunction

Decision

Conditions

The malfunction is determined as soon as the abnormality aforementioned is detected through

checking the system for any erroneous connection of units on the check operation.

Supposed

Causes

��

Improper connection of transmission wiring between indoor-outdoor units and outdooroutdoor

units

��

Failure to execute check operation

��

Defect of indoor unit PCB

��

Stop valve is left in closed

Troubleshooting

Caution

Be sure to turn off power switch before connect or disconnect connector,

or parts damage may be occurred.

YES

Are the stop valves NO

opened?

Open the stop valve.

NO

NO

YES

YES

YES

NO

Is the check

operation carried

out?

Is indoor - outdoor and

outdoor - outdoor unit

transmission wiring

normal?

Is indoor-outdoor and

outdoor-outdoor unit

transmission wiring

normal?

Replace the indoor unit PCB.

After fixing the incorrect

wiring, push and hold the

RESET button on the master

outdoor unit PCB for 5

seconds.

* The unit will not run for up to

12 minutes.

Wiring check operation may

not have been carried out