Installation manual
19
REYQ8~16M8W1B
VRVII System air conditioner
4PW23712-1
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 error is corrected, press the
button
and reset the error code.
4. Start the unit again to confirm that the problem is properly solved.
Remote controller displays an error:
6
Caution for 18~48 type units
■
Indication of the outdoor unit PCB
■
The outdoor unit connected to the indoor unit by piping is the
master outdoor unit. The other outdoor units (not connected to
the indoor unit) are the slave outdoor units.
■
Carry out all the settings of the master unit. Settings on the slave
units have no effect.
■
Carry out the leakage and vacuum tests of the oil pressure
equalizer and make sure to open the stop valve of the oil
equalizer.
■
If the unit is operated with the valve closed, it may not function
properly or even damage the equipment.
7
If no error code is indicated on the remote controller, it is
possible to start operation after 5 minutes.
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.
9. S
ERVICE
MODE
OPERATION
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1
When the unit is at a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
(ON).
-
After this is set, do not reset the setting mode 2 until the
vacuuming is finished.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Evacuate the system with a vacuum pump.
3
Press the
button and reset the setting mode 2.
Refrigerant recovery operation method
by a refrigerant reclaimer
1
When the unit is at a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
(ON).
-
The indoor unit and the outdoor unit expansion valves will
fully open and some solenoid valves will be turned on.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Cut off the power supply to the indoor units and the outdoor unit
with the circuit breaker. After the power supply to one side is cut
off, cut off the power supply to the other side within 10 minutes.
Otherwise, the communication between the indoor and outdoor
unit may become abnormal and the expansion valves will be
completely closed again.
3
Recover the refrigerant by a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
Installation error
Malfunction
code
Remedial action
The stop valve of
an outdoor unit is
left closed.
E3
E4
F3
UF
Check referring to the table in
"Additional refrigerant charge" on
page 10
.
The phases of the
power to the
outdoor units are
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).
U1
U4
Check if the power wiring for the
outdoor units are connected correctly.
(If the power wire is not connected to L2
phase, no malfunction display will
appear and the compressor will not
work.)
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.
For the
REYQ8~16, the
wiring is
connected to the
Q1/Q2 (Out Multi)
U7
UF
Remove the wiring from the Q1/Q2
(Out Multi).
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.
Master unit
Slave unit 1
Slave unit 2
BS3 RETURN
H1P
H1P
H2P
H2P
H3P
H3P
H4P
H4P
H5P
H5P
H6P
H6P
H7P
H7P
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 further 5 minutes at maximum.
■
If the system has not undergone any check operation
by the test operation button since it was first installed,
an error code "U3" is displayed. In this case, perform
check operation referring to
"8.4. Test operation" on
page 18
.
■
After the test run, when handing the unit over to the
customer, make sure the electric box lid, the service
lid, and the unit casing are all attached.
ON
BS1 MODE
ON
