Installation manual
24
REYQ8~16P8Y1B
VRVIII System air conditioner
4PW39996-1B
Correcting after abnormal completion of the test operation
The test operation is only completed if there is no malfunction code
displayed on the remote controller. In case of a displayed malfunction
code, perform the following actions to correct the abnormality:
■
Confirm the malfunction code on the remote controller
■
After correcting the abnormality, press the
button
and reset the malfunction code.
■
Carry out the test operation again and confirm that the
abnormality is properly corrected.
12.5. Final check after installation
After all installation works are completed, operate the unit normally
and check the following:
■
Make sure the indoor units and outdoor unit are operating
normally.
■
Operate each indoor unit separately and make sure the
corresponding outdoor unit is also operating properly.
■
Check if cold or hot air is coming out from the indoor unit.
■
Push the fan direction and fan strength buttons on the remote
controller to check if they are operating properly.
Installation error
Error code
Remedial action
The stop valve of an
outdoor unit is left
closed.
E3
E4
F3
F6
UF
Open the stop valve.
The phases of the
power to the outdoor
unit is reversed.
U1
Exchange two of the three phases
(L1, L2, L3) to make a positive
phase connection.
No power is supplied
to an outdoor or
indoor unit (including
phase interruption).
LC
U1
U4
Check if the power wiring for the
outdoor unit is connected correctly.
Incorrect
interconnections
between units.
UF
Check if the refrigerant line piping
and the unit wiring are consistent
with each other.
Refrigerant
overcharge.
E3
F6
UF
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 refrigerant.
E4
F3
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.
The added amount of
refrigerant was not
inputted after
automatic charging.
PF
Availability of the leak detection
function feature requires input of
the additional refrigerant charge
amount immediately after finishing
the automatic charging. Refer to
"11.6. Procedure for inputting the
additional refrigerant charge weight
into the PCB" on page 19
In case the test
operation was
interrupted or the unit
was operating out of
the instructed
temperature range,
the initial refrigerant
detection has failed.
U3
In case the the test operation was
interrupted, perform the test
operation again.
In case the unit was operating out
of the instructed temperature
range, the unit can still be operated
normally, but the leak detection
function will not be available.
Perform the test operation again
within the instructed temperature
range.
BS3 RETURN
NOTE
■
Heating is not possible if the outdoor temperature
is 24°C or higher. Refer to the operation manual.
■
If a knocking sound is heard in the liquid
compression of the compressor, stop the unit
immediately and then energize the crankcase
heater for a sufficient length of time before
restarting the operation.
■
Once stopped, the compressor will not restart in
about 5 minutes, even if the ON/OFF button on
the remote controller is pushed.
■
When the system operation is stopped by the
remote controller, the outdoor unit may continue
operation for a maximum of 5 minutes.
■
The outdoor fan may rotate at low speeds in the
night-time low noise setting or the external low
noise level setting is made; but this is not a
malfunction.