Daikin VRV III RXYQ5-54PY1, Service Manual

Page: 166 / 398

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