Fault Code UF

Fault: System is not set yet
Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units
Failure to execute check operation
Defective indoor unit PCB
Stop valve is not opened
 

For Daikin split and multi-split air conditioning systems included wall-mounted, duct-connected, floor-standing, multi-flow, stylish, european, ururu sarara & cassette-type units.
If molded case circuit breakers or earth leakage circuit breakers have tripped, do not reset the breaker immediately without first checking for any problems with insulation of equipment.
Resetting breakers without a check of insulation may cause damage to equipment.