Daikin VRV - WII Service Manual page 110

SiUS30-604
[LED display in the case of multi-outside-unit system] (Same as that in emergency operation)
Malfunction code
In case of an alarm code displayed on remote controller:
Malfunction code
E3 The shutoff valve of an outside unit is left closed.
E4 The cooling water is not provided.
F3
F6
UF
U2
U1 The phases of the power to the outside units are
reversed.
U4 No power is supplied to an outside or indoor unit
(including phase interruption).
UF Incorrect transmission between units
E3 Refrigerant overcharge
F6
UF
U2
E4 Insufficient refrigerant
F3
U7 If an outside unit multi terminal is connected when
UF there is one outside unit installed
UF The operation mode on the remote controller was
E4 changed before the check operation.
HJ The heat source water is not circulating.
1.1.4 Confirmation on Normal Operation
Conduct normal unit operation after the check operation has been completed.
(1) Confirm that the indoor/outdoor units can be operated normally.
(2) Operate indoor unit one by one to check that the corresponding outside unit operates.
(3) Confirm that the indoor unit discharges cold air (or warm air).
(4) Operate the air direction control button and flow rate control button to check the function of the
<Precautions for checking normal operation>
•
•
•
Test Operation
* Discriminate the operating status of the master unit/slave units through the following LED
display.
LED display (7:ON
H1P---H7P H8P
Master:
7777777 77 7777 7
Slave 1:
7777777 7777777 9 9
Slave 2: 7777777 7 7777777 7
(Factory set)
Installation error
(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.)
devices.
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 outside 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 malfunction code "U3" will be displayed. Be sure
to conduct the check operation according to
:OFF :Blink)
7 7 9 9
Remedial action
Open the shutoff valve.
Check the operation of cooling water pump etc.
Exchange two of the three phases (L1, L2, L3) to
make a positive phase connection.
Check if the power wiring for the outside units are
connected correctly.
(If the power wire is not connected to L2 phase, no
malfunction display will appear and the compressor
will not work.)
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
level 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 outside multi terminals (Q1
and Q2).
Set the operation mode on all indoor unit remote
controllers to "cooling".
Make sure that the water pump is running.
1.1.3 Check Operation.
Test Operation
97