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3
Press the BS4 TEST button for 5 seconds when the unit is at a
standstill. The test operation starts when the H2P led blinks and
the remote controller indicates TEST (test operation) and
(external control).
It may take 10 minutes to bring the state of refrigerant uniform
before the compressor starts, but that is not a malfunction.
The test operation is automatically carried out in cooling mode
during 15~30 minutes.
Depending on the situation, the refrigerant running sound or the
sound of a magnetic solenoid valve may rise during this
operation.
The following items are automatically checked:
-
Check for incorrect wiring
-
Check if stop valves are open
-
Check of refrigerant charge
-
Automatic judgement of piping length
NOTICE
When you want to terminate the test operation, press the
BS3 RETURN button. The unit will keep running for 30
seconds and then stops. During test operation it is
impossible to stop the unit with the remote controller.
4
After the test operation (maximum 30 minutes), the unit
automatically stops. Check the operation results by the outdoor
unit led indication.
H1P H2P H3P H4P H5P H6P H7P
normal
abnormal
CAUTION
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.
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 BS3 RETURN
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
Malfunction
Installation error
code
The stop valve of
an outdoor unit is
E3
left closed.
The stop valve of
an outdoor unit is
left closed.
Insufficient
E4
refrigerant
F3
Refrigerant
overcharge
E3
F6
Insufficient
U2
supply voltage
Installation manual
20
Remedial action
Open the stop valve on both the gas
and liquid side.
Open the stop valve on both the gas
and liquid side.
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.
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 supply voltage is
supplied properly.
Malfunction
Installation error
code
The check
U3
operation is not
performed.
No power is
supplied to the
U4
outdoor unit.
Improper type of
indoor units are
UA
connected.
The stop valve of
an outdoor unit is
left closed.
The piping and
wiring of the
UF
specified indoor
unit are not
connected
correctly to the
outdoor unit.
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,
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.
Remedial action
Perform the check operation.
Check if the power wiring for the
outdoor unit is connected correctly.
Check the type of indoor units that
are currently connected. If they are
not proper, replace them with proper
ones.
Open the stop valve on both the gas
and liquid side.
Confirm that the piping and wiring of
the specified indoor unit are
connected correctly to the outdoor
unit.
"CHANGEOVER
UNDER
RXYSQ6P8Y1B9
VRVIII-S System air conditioner
4P357505-1 – 2013.08
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