Daikin VRV-WIII RWEYQ72PTJU Service Manual page 96

Test Operation
Error code
In case of an alarm code displayed on remote controller:
Error code
E3
E4
F3
The stop valve of an
F6
opened.
UF
U2
The phases of the power to the
U1
units are reversed.
U1
No power is supplied to an
U2
indoor unit (including phase interruption).
U4
UF
Incorrect transmission between units
E3
F6
Refrigerant overcharge
UF
U2
E4
Insufficient refrigerant
F3
U7
condensing
If an
UF
when there is 1
UF
The operation mode on the remote controller
E4
was changed before the check operation.
HJ
The heat source water is not circulating.
U3
The check operation has not been performed.
E3 is activated, so ON/OFF button is pressed on
the remote controller, but this does not turn E3
E2, E3 OFF. Or E2 is activated. In case of above, there
is an error of the compressor in the
unit.
If any error codes other than the above are displayed, check the service manual for how to respond.
1.1.4 Confirmation on Normal Operation
Conduct normal unit operation after the check operation has been completed.
(1) Confirm that the indoor/condensing units can be operated normally.
(When an abnormal noise due to liquid compression by the compressor can be heard, stop the unit immediately, and
turn ON the crankcase heater to heat up it sufficiently, then start operation again.)
(2) Operate indoor unit one by one to check that the corresponding condensing unit operates.
(3) Confirm that the indoor unit discharges cold air (or warm air).
(4) Operate the air direction control button and airflow rate control button to check the function of the devices.
Precautions for checking normal operation
For a period of approximately 5 minutes after the compressor stops, even if the ON/OFF button for the indoor units
in one and the same system is pressed, the compressor will not operate.
 After stopping the compressor operation using the remote controller, the condensing unit may conduct the
residual operation for a period of 5 minutes at maximum.
 When the check operation is not conducted using the TEST OPERATION button at the first test operation after
installation, the error code "U3" will be displayed. Be sure to conduct the check operation according to
1.1.3 Check Operation
 After the test operation, when handing the unit over to the customer, make sure the electrical components box
lid, the service lid, and the unit casing are all attached.
88
Installation error
condensing unit is not
condensing
condensing
multi terminal is connected
condensing unit installed
condensing
.
Open the stop valve.
Check referring to the table in
"Additional refrigerant charge".
Exchange 2 of the 3 phases (L1, L2, L3) to make a positive
phase connection.
Check if the power wiring for the
connected correctly.
or (If the power wire is not connected to L2 phase, no error
display will appear and the compressor will not work.)
Check if the ground fault circuit interrupter in the
unit is ON.
Check if the refrigerant piping line and the unit transmission
wiring are consistent with each other.
Recalculate the required amount of refrigerant from the
piping length and correct the refrigerant charge amount by
recovering any excessive refrigerant with a refrigerant
recovery machine.
 Check if the additional refrigerant charge has been
finished correctly.
 Recalculate the required amount of refrigerant from the
piping length and add an adequate amount of refrigerant.
Remove the line from the
and Q2).
Set the operation mode on all indoor unit remote controllers
to "cooling."
Make sure that the water pump is running.
Perform the check operation.
Measure the insulation resistance of the compressor to check
the condition of the compressor.
SiUS30-1301
Remedial action
condensing units are
condensing
condensing
multi terminals (Q1
Field Setting