RXYSQ4~ RXYSQ4~6P7Y1B
VRVIII-S system air conditioner
4PW35338-1
Installation manual
20
5
Measure to be taken when operation finishes abnormally
1.
Confirm the error code on the remote controller.
2.
Correct what is abnormal.
(See the installation manual and operation manual or contact
your dealer.)
3.
After the abnormality is corrected, press the
button and reset the error code.
4.
Start the unit again to confirm that the problem is properly
solved.
5.
If no error code is indicated on the remote controller, it is
possible to start operation after 5 minutes.
Error codes on the remote controller
12.5. Checks in normal operation
Set the master unit (= indoor unit having the right to select the
cooling/heating operation mode).
In case of wired remote controllers
■
After the check operation, "CHANGEOVER UNDER CONTROL"
is blinking in all connected remote controllers.
■
Select an indoor unit to be used as the master unit in
accordance with the request from the customer.
(It is recommended to select an indoor unit which will be used
most often as the master unit.)
■
Press the operation mode selector button in the remote
controller of the indoor unit selected as the master unit.
■
In that remote controller, "CHANGEOVER UNDER CONTROL"
disappears. That remote controller will control changeover of the
cooling/heating operation mode.
■
In other remote controllers, "CHANGEOVER UNDER
CONTROL" lights up.
In case of wireless remote controllers
■
After the check operation, the timer lamp is blinking in all
connected indoor units.
■
Select an indoor unit to be used as the master unit in
accordance with the request from the customer.
(It is recommended to select an indoor unit which will be used
most often as the master unit.)
■
Press the operation selector mode button in the remote
controller of the indoor unit selected as the master unit. A "peep"
sound is issued, and the timer lamp turns off in all indoor units.
■
That indoor unit will control changeover of the cooling/heating
operation mode.
For the details, refer to the instruction manual supplied together
with the indoor unit.
12.6. Temperature adjustment operation confirmation
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.
■
Indoor units cannot be checked individually. After the
test operation is finished, check the indoor units
individually via the remote controller.
■
The led indication changes during this operation, but
that is not abnormal.
■
Please attach the front plate of the outdoor unit in
order to prevent electric shocks.
Installation error
Malfunction
code
Remedial action
The stop valve of
an outdoor unit is
left closed.
E3
Open the stop valve on both the gas
and liquid side.
The stop valve of
an outdoor unit is
left closed.
E4
F3
Open the stop valve on both the gas
and liquid side.
Insufficient
refrigerant
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.
Refrigerant
overcharge
F3
F6
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.
Insufficient supply
voltage
U2
Check if the supply voltage is supplied
properly.
The check
operation is not
performed.
U3
Perform the check operation.
No power is
supplied to the
outdoor unit.
U4
Check if the power wiring for the
outdoor unit is connected correctly.
Improper type of
indoor units are
connected.
UA
Check the type of indoor units that are
currently connected. If they are not
proper, replace them with proper ones.
The stop valve of
an outdoor unit is
left closed.
UF
Open the stop valve on both the gas
and liquid side.
The piping and
wiring of the
specified indoor
unit are not
connected
correctly to the
outdoor unit.
Confirm that the piping and wiring of the
specified indoor unit are connected
correctly to the outdoor unit.
Incorrect
interconnections
between units.
UH
Connect correctly the interconnections
between units to the F1 and F2 (TO
IN/D UNIT) terminals on the PC board
in the outdoor unit.
Power supply
cables are
connected in the
reverse phase
instead of the
normal phase.
U1
Connect the power supply cables in
normal phase. Change any two of the
three power supply cables (L1, L2, L3)
to correct phase.
BS3 RETURN
Cautions for normal operation check
■
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 a further 1 minute maximum.
■
After the test run, when handling the unit over to the
customer, make sure the electric box lid, the service
lid and the unit casing are all attached properly.
