Panasonic U-5MX4XPQ, Installation Manual

Page: 24 / 33

Installation manual
21
U-5~18MX4XPQ
Urban Multi air conditioner
4PW28163-1
■
Charging in cooling mode
6. Start up
Wait while the unit is preparing for charging in cooling mode.
7. Ready
Press the button once within 5 minutes.
If the button is not pushed within 5 minutes,
P2
will be
displayed on the remote controller. Refer to "4 Remote controller
malfunction code display" on page 21.
8. Operation
When the following led display is shown, open valve A and close
the frontpanel. If the frontpanel is left open, the system can not
operate properly during the refrigerant charging.
*
= The state of this led is not important.
9. Complete
If the display on the remote controller shows a flashing
PE
code,
charging is almost finished.
When the unit stops operating, close valve A immediately and
check the leds and check if the
P9
code is displayed on the
remote controller.
If it is not as shown above, correct the malfunction (as indicated
in the display of the remote controller) and restart the complete
charging procedure. When the charging amount is little, the
PE
code may not be displayed, but instead the
P9
code will be
displayed immediately.
10. Press the button once and the charging is complete.
Record the amount that was added on the additional refrigerant
charge label provided with the unit and attach it on the back side
of the front panel.
Perform the test procedure as described in " In case refrigerant
was added without using the leak detection function (charging in
cooling mode)" on page 25.
3 Normal system display
4 Remote controller malfunction code display
Remote controller heating mode malfunction codes
Remote controller cooling mode malfunction codes
H1P H2P H3P H4P H5P H6P H7P
Pressure control
(for the first minute) x c x x x x w
Start up control
(for the next 2 minutes) x c x x x w x
Waiting for stable
heating conditions
(for the next ±15
minutes (according to
the system))
x c x x x w w
H1P H2P H3P H4P H5P H6P H7P
c c c x w x w
H1P H2P H3P H4P H5P H6P H7P
w c
* * * * *
When a malfunction occurs, check the display of the
remote controller and refer to "Remote controller
malfunction code display" on page 21.
H1P H2P H3P H4P H5P H6P H7P
w c c w w w w
BS4 TEST
BS4 TEST
BS1 MODE
LED
display
(Default
status
before
delivery)
Micro-
computer
operation
monitor Mode
Ready
/Error
Cooling/Heating
changeover
Low
noise Demand Multi
Indivi-
dual
Bulk
(master)
Bulk
(slave)
HAP H1P H2P H3P H4P H5P H6P H7P H8P
Single outdoor
unit system
c x x w x x x x x
Multiple
outdoor
unit
system
Master
unit
(a)
(a) The state of the H8P (multi) LED in a multi-system shows wich unit is the master
unit ( w ), slave 1 unit ( c ) or slave 2 unit ( x ).
Only the master unit is connected to the indoor units with interunit wiring.
c x x w x x x x w
Slave
unit
1
(a)
c x x x x x x x c
Slave
unit
2
(a)
c x x x x x x x x
Error code
P8
recharge
operation
Close valve A immediately and press the TEST OPERATION
button once.
The operation will restart from the charging mode judgement
onwards.
P2
charge
hold
Close valve A immediately. Check
following items:
- Check if the gas side stop valve is
opened correctly
- Check if the valve of the refrigerant
cylinder is opened
- Check if the air inlet and outlet of the
indoor unit are not obstructed
After correcting the
abnormality, restart
the automatic
charging procedure
again.
Error code
PA
,
PH
,
PC
replace
cylinder
Close valve A and replace the empty cylinder. When renewed,
open valve A (the outdoor unit will not stop operating).
The code on the display shows the unit where a cylinder is to be
renewed:
PA
= master unit,
PH
= slave unit 1,
PC
= slave unit 2, flashing
PA
,
PH
and
PC
= all units
After recplacing the cylinder, open valve A again and continue the
work.
P8
recharge
operation
Close valve A immediately.
Restart the automatic charging procedure again.
P2
charge
hold
Close valve A immediately. Check
following items:
- Check if the gas side stop valve is
opened correctly
- Check if the valve of the refrigerant
cylinder is opened
- Check if the air inlet and outlet of the
indoor unit are not obstructed
- Check if the indoor temperature is not
lower than 20°C DB
After correcting the
abnormality, restart
the automatic
charging procedure
again.
*
abnormal
stop
Close valve A immediately. Confirm the
malfunction code by the remote controller
and correct the abnormality by following
the "Correcting after abnormal completion
of the test operation" on page 26.