Test Operation - Panasonic U-8ME4XPQM Manuel D'installation

12.4. Test operation

Do not insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it
will cause injury.
Do not perform the test operation while working on the
indoor units.
When performing the test operation, not only the outdoor
unit, but the connected indoor unit will operate as well.
Working on a indoor unit while performing a test operation
is dangerous.
In case the unit is operated with the leak detection function
available:
the outdoor temperature must be 0°C DB~43°C DB
the indoor temperature must be 20°C DB~32°C DB
In case the unit is operated out of the temperature range as
instructed above, the display of the remote controller shows U3
and the unit operates without the availability of the leak detection
function.
In the test operation, the following checks and judgement will be
performed:
Check of the stop valve opening
Check for wrong wiring
Check of refrigerant overcharge
Initial refrigerant detection
In case the leak detection function is available, the check
operation will last 2 hours, otherwise it takes between 40 and
60 minutes to complete the check operation.
Make sure to carry out the test operation after the first
installation. Otherwise, the malfunction code U3 will be displayed
on the remote controller and normal operation can not be
carried out.
In case of a multi system, check the settings and results on the
master unit.
Abnormalities on indoor units can not be checked for each unit
individual. After the test operation is finished, check the indoor
units one by one by performing a normal operation using the
remote controller.
A test operation can not be carried out when the
NOTE
outdoor temperature is less than –5°C.
Test operation procedure
1 Close all front panels except the front panel of the electric box.
2 Turn ON the power to all outdoor units and the connected indoor
units.
Be sure to turn on the power 6 hours before operation in order to
have power running to the crank case heater and to protect the
compressor.
3 Make the field setting as described in the paragraph "12.3. Field
setting" on page 23.
4 Press the button once, and set to the SETTING
BS1 MODE
MODE (H1P LED = OFF).
5 In case the leak detection function is required,
press and hold the
BS4 TEST
more. The unit will start the test operation.
In case the leak detection function is not required,
go into setting mode 2 by pressing the
seconds. The H1P LED is on
1. Press the button 3 times.
BS2 SET
H1P H2P H3P H4P H5P H6P H7P
w x x x x w w
Installation manual
25
button down for 5 seconds or
button for 5
BS1 MODE
w
. Perform following steps.
2. Press the
BS3 RETURN
H1P H2P H3P H4P H5P H6P H7P
w x x x x x c
3. Press the button in order to change the LED
BS2 SET
display to the following display.
H1P H2P H3P H4P H5P H6P H7P
w x x x x c x
4. Press the
BS3 RETURN
5. Press the
BS3 RETURN
test operation. The unit will start the test operation.
The test operation is automatically carried out in cooling
mode, the H2P LED will light up and the messages "Test
operation" and "Under centralized control" will display on the
remote controller.
It may take 10 minutes to bring the state of the refrigerant
uniform before the compressor starts.
During the test operation, the refrigerant running sound or
the magnetic sound of a solenoid valve may become loud
and the LED display may change, but these are not mal-
functions.
During the test operation, it is not possible to stop the unit
operation from a remote controller. To abort the operation,
press the
BS3 RETURN
±30 seconds.
6 Close the front panel in order to let it not be the cause of
misjudgement.
7 Check the test operation results by the LED display on the
outdoor unit.
H1P H2P H3P H4P H5P H6P H7P
x x w x x x x
Normal completion
x w w x x x x
Abnormal completion
8 When the test operation is fully completed, normal operation will
be possible after 5 minutes.
Otherwise, refer to "Correcting after abnormal completion of the
test operation" on page 25 to take actions for correcting the
abnormality.
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
Installation error Error code
The stop valve of an
E3
outdoor unit is left
E4
closed.
F3
F6
UF
The phases of the
U1
power to the outdoor
units are reversed.
No power is supplied
LC
to an outdoor or
U1
indoor unit (including
U4
phase interruption).
Incorrect
UF
interconnections
between units
Refrigerant
E3
overcharge
F6
UF
Insufficient refrigerant
E4
F3
button once to confirm.
button once to confirm.
button a second time to start the
button. The unit will stop after
Remedial action
Open the stop valve.
Exchange two of the three phases
(L1, L2, L3) to make a positive
phase connection.
Check if the power wiring for the
outdoor units are connected
correctly.
Check if the refrigerant line piping
and the unit wiring are consistent
with each other.
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.
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.
U-8~16ME4XPQM
Urban Multi air conditioner
4PW40728-1