Final Check After Installation; Service Mode Operation; Additional Refrigerant Charging Method - Panasonic U-8ME4XPQM Manuel D'installation

Installation error Error code
The added amount of
PF
refrigerant was not
inputted after
automatic charging.
In case the test
U3
operation was
interrupted or the unit
was operating out of
the instructed
temperature range,
the initial refrigerant
detection has failed.
After correcting the abnormality, press the
and reset the malfunction code.
Carry out the test operation again and confirm that the
abnormality is properly corrected.

12.5. Final check after installation

After all installation works are completed, operate the unit normally
and check the following:
Make sure the indoor units and outdoor unit are operating
normally.
Operate each indoor unit separately and make sure the
corresponding outdoor unit is also operating properly.
Check if cold or hot air is coming out from the indoor unit.
Push the fan direction and fan strength buttons on the remote
controller to check if they are operating properly.
NOTE Heating is not possible if the outdoor temperature
is 24°C or higher. Refer to the operation manual.
If a knocking sound is heard in the liquid
compression of the compressor, stop the unit
immediately and then energize the crankcase
heater for a sufficient length of time before
restarting the operation.
Once stopped, the compressor will not restart in
about 5 minutes, even if the ON/OFF button on
the remote controller is pushed.
When the system operation is stopped by the
remote controller, the outdoor unit may continue
operation for a maximum of 5 minutes.
The outdoor fan may rotate at low speeds in the
night-time low noise setting or the external low
noise level setting is made; but this is not a
malfunction.
13. S
ERVICE 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.
U-8~16ME4XPQM
Urban Multi air conditioner
4PW40728-1
Remedial action
Availability of the leak detection
function feature requires input of
the additional refrigerant charge
amount immediately after finishing
the automatic charging. Refer to
"11.6. Procedure for inputting the
additional refrigerant charge weight
into the PCB" on page 21.
In case the test operation was
interrupted, perform the test
operation again.
In case the unit was operating out
of the instructed temperature
range, the unit can still be operated
normally, but the leak detection
function will not be available.
Perform the test operation again
within the instructed temperature
range.
button
BS3 RETURN
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, HR unit and the outdoor unit expansion
valves will fully open.
- The H1P LED is on and the remote controller indicates
(test operation) and
operation will be prohibited.
2 Evacuate 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 under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
ON
- The indoor unit, HR unit and the outdoor unit expansion
valves will fully open.
- The H1P LED is on and the remote controller indicates
(test operation) and
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.
BS1 MODE
14. A
DDITIONAL REFRIGERANT CHARGING
METHOD
When the leak detection function is not required and the entire
refrigerant quantity can not be charged through the liquid pipe stop
valve service port with the unit not operating (refer to "Pre-charging"
on page 19), make sure to charge the remaining charging quantity
using the following procedure:
1 Turn the power of the indoor unit, the HR unit and the outdoor
unit on.
2 Make sure to open the stop valves of the suction gas pipe, the
high pressure/low pressure gas pipe and the liquid pipe
completely.
3 Connect the refrigerant charge hose to the refrigerant charging
port (for additionaly charging).
4 When the unit is not operating, push the
the additional refrigerant charging operation function A in setting
mode 2 can be defined (refer to "Setting the mode" on page 24),
w
the H1P LED is on ( ).
5 The operation starts automatically.
The H2P LED will start flashing (
operation" and "Under centralized control" will display on the
remote controller.
6 After charging the specified quantity of refrigerant, press the
button to stop the operation.
BS3 RETURN
The operation will stop within 30 minutes.
If charging is not completed after 30 minutes, set and
perform the additional refrigerant charging operation again.
If the additional refrigerant charging operation stops before
the passing of 30 minutes, the system may be overcharged.
Never charge extra refrigerant.
7 Disconnect the refrigerant charge hose.
8 Perform "11.7. Checks after adding refrigerant" as explained on
page 22.
(ON).
(external control) and the
(ON).
(external control) and the
button until
BS2 SET
c
) and the messages "Test
Installation manual
26