Specifications

SiBE28-805 Test Operation
Test Operation 79
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 BS3 RETURN malfunction
code.

Carry out the test operation again and confirm that the abnormality is properly corrected.
1.2.7 Service 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 standstill and under the setting mode 2, set the required function B
(refrigerant recovery operation / vacuuming operation) to ON (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 (test operation) and
(external control) and the operation will be prohibited.
2. Evacuate the system with a vacuum pump.
3. Press the BS1 MODE button and reset the setting mode 2.
Refrigerant recovery operation method
by a refrigerant reclaimer
1. When the unit is at standstill and under the setting mode 2, set the required function B
(refrigerant recovery operation / vacuuming operation) to ON (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 (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 Error code Remedial action
The stop valve of an outdoor unit is
left closed.
E3
E4
F3
UF
Check referring to the table in "1.2.5.5 Additional
refrigerant charge" on page 72
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.
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.