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Error codes on the remote controller:
Malfunction
Installation error
code
The stop valve of an
outdoor unit is left
closed.
Refrigerant overcharge
E3
The stop valve of an
outdoor unit is left
closed.
The operation mode on
the remote controller
E4
was changed before the
check run.
F3
Insufficient refrigerant
Refrigerant overcharge
F6
The check operation is
U3
not performed.
No power is supplied to
the BP unit.
U4
Incorrect transmission
wiring between indoor
unit and BP unit.
Improper type of indoor
units or BP units are
UA
connected.
The piping and wiring of
the specified indoor unit
UF
are not connected
correctly to the BP unit.
Incorrect transmission
wiring between outdoor
UJ
unit and BP unit(s).
UH
11.5. 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.
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.
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.
Installation manual
17
Remedial action
Open the stop valve on both the gas
and liquid side.
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.
Open the stop valve on both the gas
and liquid side.
Set the operating mode on all indoor
unit remote controllers to "cooling".
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.
Perform the check operation.
Check if the power wiring for the BP unit
is connected correctly.
Connect the interconnections (1, 2, 3)
between indoor unit and BP unit
correctly.
Check the type of indoor units and BP
units that are currently connected. If
they are not proper, replace them with
proper ones.
Confirm that the piping and wiring of the
specified indoor unit are connected
correctly to the BP unit.
Connect interconnections F1 and F2 of
the connected BP unit correctly to the
outdoor unit's PC board (TO BP UNIT)
Wiring of the connected BP unit is
correct, but interconnections F1 and F2
of other BP unit(s) need to be
connected correctly to the outdoor unit's
PC board (TO BP UNIT).
12. S
ERVICE MODE OPERATION
After turning on the power supply, the unit can not be started untill the
H2P initialisation led, indicating that the unit stil is under preparation,
goes off (maximum 12 minutes).
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1
When the unit is at standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
-
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
operation will be prohibited.
2
Vacuum the system with a vacuum pump.
3
Press the
button and reset the setting mode 2.
BS1 MODE
Refrigerant recovery operation method
by a refrigerant reclaimer.
1
When the unit is at standstill and in setting mode 2, set the
required function B (refrigerant recovery operation/vacuuming
operation) to
(ON).
ON
-
Expansion valves of BP unit and outdoor unit will fully open
and some solenoid valves will open.
-
The H1P led is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2
Cut off the power supply to the BP 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 BP unit and outdoor
unit may become abnormal and the expansion valves will be
completely closed again.
3
Recover the refrigerant using a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
(ON).
ON
(external control) and the
(external control) and the
RMXS112~160D7V3B
Super Multi Plus System air conditioner
4PW19516-1B
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