Daikin RXYQ18M9W1B [24/28] Test operation

Daikin RXYQ5M9W1B [24/28] Test operation
Installation manual
19
RXQ5~10 + RXYQ5~48M9W1B
VRVII System air conditioner
4PW21816-1A
8.4. Test operation
Check the stop valves
Make sure to open the gas and liquid line stop valves.
After installation, perform the test operation.
Unless the test operation is performed, the error code "U3" is
shown on the remote controller and the unit cannot be operated.
Performing the test operation
1 To protect the compressor, make sure to turn on the power
supply 6 hours before starting operation.
2 Set to setting mode 1 (H1P led is off) (refer to "Setting mode 1"
on page 17).
3 Press the button for 5 seconds (or longer when the
unit is at standstill). The test operation starts when the H2P led
blinks and the remote controller indicates (test operation)
and (external control).
It may take 10 minutes to bring the state of refrigerant uniform
before the compressor starts, but that is not a malfunction.
The test operation is automatically carried out in cooling mode
during 15~30 minutes.
Depending on the situation, the refrigerant running sound or the
sound of a magnetic solenoid valve may rise during this
operation.
The following items are automatically checked:
- Check for miswiring
- Check if stop valves are open
- Check of refrigerant charge
-Automatic judgement of piping length
4 After the test operation (maximum 30 minutes), the unit
automatically stops. Check the operation results by the outdoor
unit led indication.
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.
Error codes on the remote controller:
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.
NOTE
In case of 18~48 type: check the setting and the
indication results. Refer to chapter "Caution for
18~48 type units" on page 19.
After turning on the power supply, the unit cannot
be started until the H2P initialisation led goes off
(maximum 12 minutes).
NOTE
When you want to terminate the test operation,
press the button. The unit will keep
running for 30 seconds and then stops. During
test operation it is impossible to stop the unit with
the remote controller.
normal
abnormal
Indoor units cannot be checked individually. After the
test operation is finished, check the indoor units
individually via the remote controller.
The led indication changes during this operation, but
that is not abnormal.
Please attach the front plate of the oudoor unit in
order to prevent incorrect judgement during operation.
BS4 TEST
BS3 RETURN
H1P
H1P
H2P
H2P
H3P
H3P
H4P
H4P
H5P
H5P
H6P
H6P
H7P
H7P
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
"6.8. Additional refrigerant charge" on
page 11
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
RX(Y)Q5~16, 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

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