View Full Version : Daikin Fault
rasper
08-04-2011, 10:37 PM
Has anyone any information on what a (uf) fault on a daikin vrv3 system and any way of fixing it .
Brian_UK
08-04-2011, 11:00 PM
Fault code list here...
http://www.daikinac.com/DOC/Malfunction_Code_Chart_001.pdf
install monkey
08-04-2011, 11:05 PM
“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
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