Service Mode Operation - Panasonic U-8ME3XPQ Manuel D'installation

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
and reset the error code.
4. Start the unit again to confirm that the problem is properly solved.
Remote controller displays an error:
Malfunction
Installation error code
The stop valve of E3
an outdoor unit is
E4
left closed.
F3
UF
The phases of the U1
power to the
outdoor units are
reversed.
No power is U1
supplied to an
U4
outdoor or indoor
unit (including
phase
interruption).
Incorrect UF
interconnections
between units
Refrigerant E3
overcharge
F6
UF
For the U7
U-8~16ME3 , the
UF
wiring is
connected to the
Q1/Q2 (Out Multi)
Insufficient E4
refrigerant
F3
6 Caution for 18~48 type units
Indication of the outdoor unit PCB
H1P H1P H2P H2P
Master unit
Slave unit 1
Slave unit 2
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.
Installation manual
19
button
BS3 RETURN
Remedial action
Check referring to the table in
"Additional refrigerant charge" on
page 10.
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.
(If the power wire is not connected to L2
phase, no malfunction display will
appear and the compressor will not
work.)
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.
Remove the wiring from the Q1/Q2
(Out Multi).
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.
H3P H3P H4P H4P H5P H5P H6P H6P H7P H7P
Temperature adjustment operation confirmation
After the test run is over, operate the unit normally. (Heating is not
possible if the outdoor temperature is 24°C or higher.)
Make sure the indoor and outdoor units are operating normally
(If a knocking sound can be heard in the liquid compression of
the compressor, stop the unit immediately and then energize the
heater for a sufficient length of time before restarting the
operation.)
Run each indoor unit one at a time and make sure the
corresponding outdoor unit is also running.
Check to see if cold (or hot) air is coming out of the indoor unit.
Press the fan direction and fan strength buttons on the indoor
unit to see if they operate properly.
Cautions for normal operation check
Once stopping, the compressor will not restart in
about 5 minutes even if the Run/Stop button of an
indoor unit in the same system is pressed.
When the system operation is stopped by the remote
controller, the outdoor units may continue operating
for further 5 minutes at maximum.
If the system has not undergone any check operation
by the test operation button since it was first installed,
an error code "U3" is displayed. In this case, perform
check operation referring to "8.4. Test operation" on
page 18.
After the test run, when handing the unit over to the
customer, make sure the electric box lid, the service
lid, and the unit casing are all attached.
9. S
ERVICE 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 a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
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 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 a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
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 operation) and
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.
(ON).
(external control) and the
(ON).
(external control) and the
U-8~16ME3XPQ
Urban Multi air conditioner
4PW16786-1C