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English
[Remote controller displays malfunction code]
Note
If any malfunction codes other than the above are displayed, check
the service manual for how to respond.
12. ONSITE SETTINGS
Use the push button switches (BS1 through BS5) on the outdoor unit
PC-board (A1P) to make the necessary onsite settings.
See the “Service Precautions” label (upper) on the EL. CONPO. BOX
(1) lid for details on the positions and operating method of the push
button switches and on the onsite setting. (see figure 32)
Make sure to record the setting on the accessory “REQUEST FOR
THE INDICATION” label.
Warning
Electric Shock Warning
Use an insulated rod to operate the push buttons via the inspection
door of EL. COMPO. BOX (1) lid.
There is a risk of electric shock if you touch any live parts, since
this operation must be performed with the power on.
13. TEST RUN
13-1 Before test run
•
Make sure the following works are completed in accordance with
the installation manual.
Piping work
Wiring work
Air tight test
Vacuum drying
Additional refrigerant charge
Check operation
•
Check that all work for the BS, indoor unit are finished and there
are no danger to operate.
13-2 Test Run
After all works are completed, operate the unit normally and check
the following.
(1) Make sure the indoor and outdoor units are operating normally.
(2) Operate each indoor unit one by one and make sure the corre-
sponding outdoor unit is also operating.
(3) Check to see if cold (or hot) air is coming out from the indoor unit.
(4) Push the fan direction and strength buttons on the remote control-
ler to see if they operate properly.
Note
•
Heating is not possible if the outdoor temperature is 24°C or
higher. Refer to the Operation manual.
•
If a knocking sound can be heard in the liquid compression of the
compressor, stop the unit immediately and then energize the
crank case heater for a sufficient length of time before restarting
the operation.
•
Once stopping, the compressor will not restart in about 5 minutes
even if the On/Off button of the remote controller is pushed.
•
When the system operation is stopped by the remote controller,
the outdoor units may continue operating for further 5 minutes at
maximum.
•
The outdoor unit fan may rotate at low speeds if the Night-time low
noise setting or the External low noise level setting is made, but
this is not a malfunction.
•
If the check operation was not performed at first istallation, the
malfunction code “U3” will be displayed in the remote controller.
Perform the check operation following
“11-2-2 Procedure of
Check Operation”
.
13-3 Checks After Test Run
Perform the following checks after the test run is complete.
•
Record the contents of field setting.
→
Record them on the accessory “REQUEST FOR THE INDI-
CATION” label.
And attach the label on the back side of the front panel.
•
Record the installation date.
→
Record the installation date on the accessory “REQUEST
FOR THE INDICATION” label in accordance with the
IEC60335-2-40.
And attach the label on the back side of the front panel.
Note
After the test run, when handing the unit over to the customer, make
sure the EL.COMPO.BOX lid, the inspection door, and the unit casing
are all attached.
14. CAUTION FOR REFRIGERANT LEAKS
(Points to note in connection with refrigerant leaks)
Introduction
The installer and system specialist shall secure safety against
leakage according to local regulations or standards. The following
standards may be applicable if local regulations are not available.
The VRV System, like other air conditioning systems, uses R410A as
refrigerant. R410A itself is an entirely safe non-toxic, non-combusti-
ble refrigerant. Nevertheless care must be taken to ensure that air
conditioning facilities are installed in a room which is sufficiently large.
This assures that the maximum concentration level of refrigerant gas
is not exceeded, in the unlikely event of major leak in the system and
this in accordance to the local applicable regulations and standards.
Maximum concentration level
The maximum charge of refrigerant and the calculation of the maxi-
mum concentration of refrigerant is directly related to the humanly
occupied space in to which it could leak.
The unit of measurement of the concentration is kg/m
3
( the weight in
kg of the refrigerant gas in 1m
3
volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
In Australia the maximum allowed concentration level of refrigerant to
a humanly space is limited to 0.35kg/m
3
for R407C and 0.44kg/m
3
for
R410A.
1.
direction of the refrigerant flow
2.
room where refrigerant leak has occurred (outflow of all
the refrigerant from the system)
Pay a special attention to the place, such as a basement, etc.
where refrigerant can stay, since refrigerant is heavier than air.
Malfunc-
tion code
Installation error
Remedial action
E3, E4
F3, F6
UF
The shutoff valve of the out-
door 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 out-
door, BS or indoor unit (includ-
ing phase interruption).
Make sure the power source wire is prop-
erly connected to the outdoor, BS or
indoor unit and revise if necessary.
UF
There is conflict on the con-
nection 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 refrig-
erant from the piping length and correct
the refrigerant charge level by recovering
any excessive refrigerant with a refriger-
ant 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
Field wiring is connected to
“TO MULTI UNIT (Q1,Q2)” ter-
minal on the outdoor unit PC-
board (A1P) when the system
is one outdoor system.
Remove the line from the “TO MULTI
UNIT (Q1, Q2)” terminal.
UA
The internal transmission wir-
ing to “TO MULTI UNIT
(Q1,Q2)” for the single outdoor
unit system are disconnected.
Connect the internal transmission wiring
to “TO MULTI UNIT (Q1,Q2)”. (See the
wiring diagram.)
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