Daikin VRV-WIII, Installation Manual

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15 English
(Refer to figure 27)
1. Electrical box
2. Cover of electrical box
3. Cover for servicing
4. Inspection cover
5. Points to be noted when providing services
〈
Cautions for check operation
〉
• If operated within about 12 minutes after power supply has been
applied to the indoor unit and outside unit, H2P will turn ON but
the compressor does not start running. Before start operation,
make sure that the LED display is correct referring to the table (6)
of “
11-3 Check operation ”.
• The system may require up to 10 minutes until it can start the
compressor after an operation start. This is a normal operation to
equalize the refrigerant distribution.
• The check operation does not provide any means of checking the
indoor units individually. For that purpose, perform normal opera-
tion using the remote controller after the check operation.
• Check operation is not possible in other modes such as collection
mode.
• If the setting of indoor remote controller is changed before the
check operation, it may not be performed correctly and malfunc-
tion code “UF” may be displayed.
Remote controller displays malfunction code
11-4 Check of normal operation
After the check operation is completed, operate the unit normally.
(Heating is not possible if the outdoor temperature is 24°C or higher.
Refer to the Operation manual.)
Check the below items.
• Make sure the indoor and outside 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 corre-
sponding outside unit is also running.
• Check 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 check if they operate properly.
Caution
〈
Cautions for normal operation check
〉
• Once stopping, the compressor will not restart in about 5 min-
utes 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 control-
ler, the outside units may continue operating for further 5 min-
utes at maximum.
• If the system has not undergone any check operation by the
test operation button since it was first installed, an malfunction
code “U3” is displayed. In this case, perform check operation
referring to “
11-3 Check operation ”.
• After the test run, when handing the unit over to the customer,
make sure the EL. COMPO. BOX cover, the inspection door,
and the unit casing are all attached.
(7) • Using the push button switches (BS1 -
5) on the P-panel (A1P) of outside unit,
carry out a local setting, if necessary.
• In case of an installation of multiple
outside units, carry out the setting on
the master unit.
(Setting on the slave unit becomes
invalid.)
Always carry out the setting only after the
power supply has been applied .
For the method of setting, refer to the label of
“
Points to be noted when providing ser-
vices ” attached to the cover of electrical box
(shown in the figure 27) of the outside unit.
(After setting, record the details of that setting
to the label of “Points to be noted when pro-
viding services” without fail.)
(8)Check all shutoff valve is opened.
If some shutoff valve is closed, open them.
(Refer to “
9-10 Shutoff valve operation
procedure ”.)
[CAUTION]
Do not leave any shutoff valve closed.
Otherwise the compressor will fail.
For Heat recovery system of cooling and
heating:
Open all stop valves on the suction side,
discharge gas side and liquid side.
For cooling and heating switching operation
system:
Open the stop valves on discharge gas side
and liquid side. (Keep the stop valve on
suction side fully closed.)
(9)Perform the check operation following the
instructions printed on the [Service
Precautions] label.
If you push the test run button (BS4) on the
P-panel (A1P) of the outside unit.
for 5 seconds, the test run starts.
If you want to interrupt the test run, push the
RETURN button (BS3) on P-panel (A1P) of
the outside unit. The system continues resid-
ual operation for about 1 minute (maximum
10 minutes) and then stops.
(During test run, you cannot stop it by a com-
mand from a remote controller.)
You need to perform the above settings
on the PCB by accessing the PCB through
the inspection cover on the switch box
cover.
Malfunc-
tion code
Installation error Remedial action
E3
E4
F3
F6
UF
U2
The shutoff valve of an
outside unit is left
closed.
Open the shutoff valve.
U1
The phases of the
power to the outside
units are reversed. Exchange two of the three
phases (L1, L2, L3) to make a
positive phase connection.
U3
The check operation
is not completed.
Complete the check operation.
U1
U2
U4
No power is supplied to
an outdoor or indoor
unit (including phase
interruption).
Check if the power wiring for the
outside units are connected cor-
rectly.
(If the power wire is not con-
nected to L2 phase, no malfunc-
tion display will appear and the
compressor will not work.)
UF
Incorrect transmission
between units
Check if the refrigerant piping line
and the unit transmission wiring
are consistent with each other.
E3
F6
UF
U2
Refrigerant overcharge
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.
E4
F3
Insufficient refrigerant
• Check if the additional refrig-
erant charge has been fin-
ished correctly.
• Recalculate the required
amount of refrigerant from the
piping length and add an ade-
quate amount of refrigerant.
U7
UF
If an outdoor multi ter-
minal is connected
when there is one out-
side unit installed
Remove the line from the outdoor
multi terminals (Q1 and Q2).
UF
E4
The operation mode on
the remote controller
was changed before
the check operation.
Set the operation mode on all
indoor unit remote controllers to
“cooling.”
HJ
The heat source water
is not circulating. Make sure that the water pump
is running.
01_EN_3P153897-8L.fm Page 15 Friday, July 11, 2008 5:04 PM