Daikin VRV II Series Design, Installation & Testing Instructions page 199

Si39-303
Remote controller displays an error:
Installation error
The shutoff valve of an indoor
unit is left closed.
The phases of the power to
the outdoor units are
reversed.
No power is supplied to an
outdoor or indoor unit
(including phase
interruption).
Incorrect interconnections
between units
Refrigerant overcharge
Insufficient refrigerant
Temperature adjustment operation confirmation
!
Caution <Cautions for normal operation check>
!
!
!
!
Installation Manual
After the test run is over, operate the unit normally. (Heating is not possible if the outdoor
temperature is 24°C or higher.)
• Make sure the indoor and outdoor units are operating normally (If a knocking sound can
be heard in the liquid compression of the compressor, stop the unit immediately and then
energize the heater for a sufficient length of time before restarting the operation.)
• Run each indoor unit one at a time and make sure the corresponding outdoor unit is also
running.
• Check to see if cold (or hot) air is coming out of the indoor unit.
• Press the fan direction and fan strength buttons on the indoor unit to see if they operate
properly.
Once stopping, the compressor will not restart in about 5 minutes even if the Run/Stop
button of an indoor unit in the same system is pressed.
When the system operation is stopped by the remote controller, the outdoor units may
continue operating for further 5 minutes at maximum.
If the system has not undergone any check operation by the test operation button since it
was first installed, an error code "U3" is displayed. In this case, perform check operation
referring to
"8-2 Test run".
After the test run, when handing the unit over to the customer, make sure the electric box lid,
the service lid, and the unit casing are all attached.
Malfunction
code
E3 E4 Check referring to the table in "6-6 Additional
F3 UF Refrigerant Charge".
Exchange two of the three phases (L1, L2, L3) to make
U1
a positive phase connection.
Check if the power wiring for the outdoor units are
connected correctly.
U1
(If the power wire is not connected to L2 phase, no
U4
malfunction display will appear and the compressor will
not work.)
Check if the refrigerant line piping and the unit wiring
UF
are consistent with each other.
Recalculate the required amount of refrigerant from the
E3
piping length and correct the refrigerant charge level by
F6
recovering any excessive refrigerant with a refrigerant
UF
recovery machine.
Check if the additional refrigerant charge has been
finished correctly.
E4
Recalculate the required amount of refrigerant from the
F3
piping length and add an adequate amount of
refrigerant.
Before Operation
Remedial action
193