Daikin VRV III RXYQ5-54PY1 Service Manual page 166

Si34-601A
[Remote controller displays malfunction code]
Malfunction
If any malfunction codes other than the above are displayed, check the service manual for how
to respond.
Test Operation
Installation error
code
E3, E4
The shutoff valve of the outdoor
F3, F6
unit is left closed.
UF
The phases of the power to the
U1
outdoor unit is reversed.
U1 No power is supplied to an outdoor
U4 or indoor unit (including phase
LC interruption).
There is conflict on the connection
UF of transmission wiring in the
system.
E3
F6 Refrigerant overcharge.
UF
E4
Insufficient refrigerant.
F3
If the outdoor unit terminal is
U7, U4
connected when there is one
UF, UH
outdoor unit installed.
Remedial action
Open the shutoff valve.
Exchange two of the three phases (L1, L2, L3) to
make a proper connection.
Make sure the power source wire is properly
connected to the outdoor unit and revise if
necessary.
Check if the refrigerant piping line and the
transmission wiring are consistent with each other.
Recalculate the additional amount refrigerant from
the piping length and correct the refrigerant charge
level by recovering any excessive refrigerant with
a refrigerant recovery machine.
• Check if the additional refrigerant charge has
been finished correctly.
• Recalculate the additional amount refrigerant
from the piping length and add the adequate
amount.
Remove the line from the outdoor multi terminals
(Q1 and Q2).
Test Operation
155