Daikin VRV III REYQ8PY1B, Service Manual

Page: 197 / 472

Test Operation SiBE37-701
186 Test Operation
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.
1.2.6.5 Service mode operation
Note: Do not shut off the power and do not reset the setting of mode 2 when vaccuuming or
recovering refrigerant. Otherwise the expansion valves will close making it impossible to
vaccuum the system or to recover the refrigerant.
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).
- The indoor unit, BS unit and the outdoor unit expansion valves will fully open.
- 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 standstill and under the setting mode 2, set the required function B
(refrigerant recovery operation/vacuuming operation) to (ON).
- The indoor unit, BS unit and the outdoor unit expansion valves will fully open.
- The H1P LED is on and the remote controller indicates
(test operation) and
(external control) and the operation will be prohibited.
2. Recover the refrigerant by a refrigerant reclaimer. For details, see the operation manual
delivered with the refrigerant reclaimer.
3. Press the button and reset the setting mode 2.
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 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).
LC
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.
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.
BS3 RETURN
ON
BS1 MODE
ON
BS1 MODE