Panasonic Inverter Air Conditioner R410A Technical Data And Service Manual

							1-95
1. Specifications
  Fig. 1-73 shows an example of installation.
6-24. Installing the Drain Piping
(1)  Prepare standard hard PVC pipe for the drain and 
use the supplied hose band to prevent water leaks.
The PVC pipe must be purchased separately. 
When doing this, leave a gap between the drain 
socket of the unit and the PVC pipe to allow the 
drainage to be checked. The transparent drain 
pipe allows you to check drainage. (Fig. 1-74)
(2)  After connecting the drain piping securely, wrap 
the supplied packing and drain pipe insulator 
around the pipe, then secure it with the supplied 
clamps. (Fig. 1-75)
NOTE
Make sure the drain pipe has a downward gradient 
(1/100 or more) and that there are no water traps.
CAUTIONTighten the hose clamps so 
their locking nuts face upward. 
(Fig. 1-74)
Air outlet duct
Air-outlet grille
Ceiling material Indoor unitBolt anchor
Suspension bolt
Air-intake duct
Air-intake grille
Drain hose
(supplied) Packing
(supplied)Transparent part for 
checking drainageHose band
(supplied)Drain hose
adapter
(supplied)Hard PVC pipe
(not supplied)
Adhere with 
PVC adhesive.
Fig. 1-74
Drain insulator (supplied)  Clamps (supplied)
Fig. 1-75
Fig. 1-73
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-96
1. Specifications
CAUTION
Do not install an air bleeder tube as this may cause 
water to spray from the drain pipe outlet. (Fig. 1-76)
If it is necessary to increase the height of the drain 
pipe, the section directly after the connection port 
can be raised a maximum of 19-11/16. 
Do not raise it any higher than 19-11/16, as this 
could result in water leaks. (Fig. 1-77)
Do not install the pipe with an upward gradient from 
the connection port. This will cause the drain water 
to flow backward and leak when the unit is not 
operating. (Fig. 1-78)
Do not apply force to the piping on the unit side 
when connecting the drain pipe. The pipe should not 
be allowed to hang unsupported from its connection 
to the unit. Fasten the pipe to a wall, frame, or other 
support as close to the unit as possible. (Fig. 1-79)
Refer to “   SUPPLEMENT ON DRAIN PIPING”.
6-25. Checking the Drainage
After wiring and drain piping are completed, use the 
following procedure to check that the water will drain 
smoothly. For this, prepare a bucket and wiping cloth to 
catch and wipe up spilled water.
(1)  Connect power to the power terminal board (L1, L2 
terminal) inside the electrical component box.
(2)  Remove the tube cover and through the opening, 
slowly pour about 0.3 gal. of water into the drain pan 
to check drainage.
(3)  Short the check pin (CN5 white) on the indoor control 
board and operate the drain pump. Check the water 
CAUTIONBe careful since the fan will start 
when you short the pin on the 
indoor control board.
(4)  When the check of drainage is complete, open the 
check pin (CN5 white) and remount the insulator and 
drain cap onto the drain inspection port.
CAUTIONTo mount the tube cover, use 5/16 
(4 × 8 mm) tapping screws.
Do not use long screws as they 
may puncture the drain pan and 
Air bleeder
Not good
Fig. 1-76
Good
11-13/16 or less
19-11/16 or less
Fig. 1-77
No goodUpward gradient
Fig. 1-78
Good Support pieces
Fig. 1-79
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-97
1. Specifications
6-26. Increasing the Fan Speed
If external static pressure is too great (due to long 
extension of ducts, for example), the air flow volume 
may drop too low at each air outlet. This problem may 
be solved by increasing the fan speed using the 
following procedure:
(1)  Remove 4 screws on the electrical component box 
and remove the cover plate.
(2)  Disconnect the fan motor sockets in the box.
(3)  Take out the booster cable (sockets at both ends) 
clamped in the box.
(4)  Securely connect the booster cable sockets 
between the disconnected fan motor sockets in 
step 2 as shown in the Fig. 1-80.
(5)  Place the cable neatly in the box and reinstall the 
cover plate.
How to read the diagram
The vertical axis is the external static pressure 
(Pa) while the horizontal axis represents the air 
flow (CFM).
The characteristic curves for “HT”, “H”, “M” and “L” 
fan speed control are shown.
The nameplate values are shown based on the 
“H” air flow. For the 26 type, the air flow is 636 
CFM, while the external static pressure is 49 Pa 
at “H” position. If external static pressure is too 
great (due to long extension of duct, for example), 
the air flow volume may drop too low at each air 
outlet.
This problem may be solved by increasing the fan 
speed as explained above.
Refer to “ 
 SUPPLEMENT ON DRAIN PIPING”.
Indoor Fan Performance
26 Type
36 Type
HT : Using the booster cable
H : At shipment
900
Air Flow (CFM)
e r u s s
e r
P c
i t a t
S l a
n r e
t x E
0 50
0 0.1 0.2 0.3 0.4 0.5 150
700 500 300
e n i
l t i m i L
L 100
MH
)
a P (
) q A n
i (
e n
i l
t i
m i L
HT
Air Flow (CFM)
e r u s s e r
P c
i t a t S l a n r e t x
E
0 50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.8
150 200
500 1000
e n i
l t
i m i L
LMHHT 100
) q
A n i
() a P (
e n
i l
t i m
i L
NOTE
Fig. 1-81
Booster cable
Booster cable Electrical component box
(At shipment) (Booster cable installed) Fan motor socket Fan
motor
Fig. 1-80
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-98
1. Specifications
6-27. When Installing the Indoor Unit
Confirm that the indoor unit should be installed in a horizontal position.
Use the level gauge or vinyl tube and check every four corner of the
unit is in horizontal.
If the air outlet duct flange is positioned with downward gradient,
there is in danger of water splash or drainage.
Also, dust may sometimes be contaminated inside the drain pan caused
by the residual drain water.
Install the air outlet duct flange side in horizontal or upward and within the
range of 3/8 in the upward direction.
Never install it with a downward gradient against horizontal.
Fig. 1-82
6-28. Required Minimum Space for Installation and Service
If the ceiling tiles cannot be removed, provide the opening holes on the
lower side of the indoor unit for removing the unit in order to maintain
and clean the drain pan and heat exchanger or provide a minimum of
1.0 ft. or more space.
Fig. 1-83
(Prohibited)
(Prohibited)
Air outlet duct flangeLevel gauge
Make sure to confirm 
that the unit is in horizontal 
at the position of the 
ceiling-mount hanger by 
using a level gauge 
or vinyl tubing.
(Prohibited)
(Prohibited)
Air outlet duct flangeLevel gauge
Make sure to confirm 
that the unit is in horizontal 
at the position of the 
ceiling-mount hanger by 
using a level gauge 
or vinyl tubing.
Min. 1.0 ft. or more spaceMin. 1.0 ft. or more space
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-99
1. Specifications
SUPPLEMENT ON DRAIN PIPING
Checkpoint after installation
After installation of indoor and outdoor units, panels and electrical wiring, check the following items.
  k r a m e R     k c e h C   m o t p m y S   t n i o p k c e h C
1Make sure whether indoor and outdoor units are 
correctly installed.Fall, vibration, noise
2  Make sure whether gas leakage is tested.   No cooling, no heating  
3Make sure whether insulation is completed. 
(Refrigerant piping and drain piping)Water leakage
4  Make sure whether drain water is running smoothly.   Water leakage  
5Make sure whether the power voltage matches the 
nameplate.Inoperative, burnout
6Make sure whether there is miswiring or incorrect 
connection.Inoperative, burnout
7Make sure whether the ground construction is 
completed.Ground leakage
8Make sure whether the wire gauge is followed by the 
recommended specifications.Inoperative, burnout
9Make sure whether the air intake and air outlet of the 
indoor and outdoor units are sealed by obstacles.No cooling, no heating
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-100
1. Specifications
7. HOW TO INSTALL THE WIRELESS REMOTE CONTROLLER
IMPORTANT
When using this air conditioner with the wireless remote controller it may sometimes be impossible to change 
the operation modes while other indoor unit is running.
   When this happens, a double beep tone sounds, the 
 (operation lamp) lights up, and the  (Timer lamp) and
 (Standby lamp) blink alternately.
Operation is the same even during (AUTO mode) automatic cooling or heating.
 A beep tone sounds 5 times and no changes can be made when any of the ON/OFF, MODE, Temperature setting 
buttons were pressed while set under central control by the system controller.
7-1. Wireless Remote Controller Installation
The remote controller can be operated from either a non- xed position or a wall-mounted position.
To ensure that the air conditioner operates correctly, do not install the remote controller in the following places:
   In direct sunlight.
 Behind a curtain or other place where it is covered.
   More than 26 ft. away from the air conditioner.
 In the path of the air conditioner’s airstream.
 Where it may become extremely hot or cold.
   Where it may be subject to electrical or magnetic interference.
(1) If Wall-mounted Fixed Position
Install the remote controller at a convenient
location on a nearby wall. However, before
attaching the remote controller mounting cradle,
check that the remote controller can operate from
the desired wall position. (Fig. 1-84)
How to Install Batteries
See Fig. 1-85.
(1) Press and slide the lid on the back of the remote
controller in the direction of the arrow.
(2) Install two AAA alkaline batteries. Make sure the
batteries point in the direction marked in the
battery compartment.
(3) Press the reset hole, then replace the lid. If you
press it, the current time, ON time, and OFF time
are all reset to 0:00.
Fig. 1-85 Fig. 1-84
Reset hole
Cover
12
Fasten the remote control 
mount with screws.Fitting the remote 
control in the mount.
Remote control mount
Press
Put in
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-101
1. Specifications
7-2. Room Temperature Sensor Setting
The room temperature sensors are built into the indoor unit and the wireless remote controller. Either of these room 
temperature sensors can operate.
The system is shipped from the factory set to the indoor unit sensor. To switch to the remote control sensor, press the 
sensor switching button located inside the remote control cover and check that A/C SENSOR on the LCD display panel 
goes out.
NOTE
If the sensor switch is set to the remote controller side,
but no room temperature data is sent to the main unit
for 10 minutes, the sensor is automatically switched to
the indoor unit side. As much as possible, install the
remote controller facing the unit.
7-3. Address Switches
If you are installing more than 1 indoor unit (up to 6) in the same room, it is necessary for you to assign each unit its 
own address so they each can be operated by their remote controller.
Up to 6 indoor units can be controlled separately through the address switches. The operating control has the reception 
address switch and the remote controller has the transmission address switch. This function is utilized by matching the 
transmission and reception address switches.
7-4. Setting the Model Code
Flap display selector switch
Make the slide switch settings in the battery compartment box of the remote controller depending on the type of 
indoor unit in which the wireless receiving unit is used.
Operation mode switch
In this Single Split System Air Conditioner set the switch to “A”.
* The switch is factory set to “S” / “A”.
* Always press the reset button after switching the setting.
ADRADRADRADR
123
456123
456123
456
Remote control
address display
* Any address
switch position
available Address switch
positionsSensor button
Fig. 1-86
Fig. 1-87
Flap display
selector switch Operation
mode switch
SKN AHC
SKN
K1 type ep y t   1 F s e p y t   1 T   , 1 U
SKNSKN
AHCAHC
Cooling only
AHC
Heat pump without
Auto modeHeat pump with
Auto mode 1 2
1
2
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-102
1. Specifications

4-Way Cassette Type (U1 Type)
7-5. Indicator Section Installation
 Remove the ceiling panel and indicator cover and 
install the indicator section.
(1) Remove the ceiling panel.
(2) Remove the corner cover behind the mark section.
(3 screws)
(3) Remove the mark section inside the ceiling panel.
(2 screws)
(4) Install the indicator section in the location where the
mark section was attached. (2 screws)
(5) Form the wire to match the panel ribs as shown in
Fig. 1-89.
(6) Install the corner cover. (Restrain the wire with the
corner cover.)
7-6. Operating Controller Installation
Install the operating controller at the indoor unit intake
port section.
(1) Fasten the operating controller to the indoor unit
intake port section (electrical component box
opposite side) with the 2 accessory screws
(4×L13/32).
(2) Connect the operating controller 2 wires (WHT,
BLK) to the remote control wire (WHT) in the
electrical component box. (For details on
wiring, see the section “7-9. Electrical wiring” .)
(3) Install the ceiling panel.
(4) Connect the indicator section and the operating
controller with the 6P connector (white).
(5) Form the wires with vinyl clamps and fasten.
(6) Connect the ceiling panel wiring connector (2P,
3P) to the body connector in the electrical component
box.
(7) For details on test operation, see “Test Run.”
CAUTION Do not twist the operating
controller wires together
with the power supply
wires. Doing so can result
in malfunction.
   If electrical noise is induced
in the unit power supply,
take appropriate measures,
for example installing a
noise filter.
Fig. 1-90
Fig. 1-89
Fig. 1-88
Ceiling panelAir intake grille
Mark section
(indicator section)
Corner cover
3 screws
2 screws
Indicator sectionWiring Pass the wiring through under the shaft.
Electrical
component box Operating
controller
Screws
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-103
1. Specifications
Ceiling Type  (T1 Type)
7-7. Indicator Section Installation
Remove the side panel to install the indicator section.
(Fig. 1-91)
(1) Remove the side panel.
Open the air intake grille, remove the screw at
one place and then remove the side panel by
sliding it toward the front (arrow direction).
(2) Remove cover A and cover B.
Insert a  athead screwdriver into the grooves
of cover A to remove cover A and cover B.
(When removing the cover, take care not to
scratch the panel.)
(3) Remove cover B from cover A.
(4) Install the indicator section at cover A.
(5) After passing through the lead wires, install cover
A and the indicator section at the panel hole.
(The protrusion part of cover A is  xed with the
panel hole.)
(6) Bundle the lead wires along with the wiring of the
louver motor.
(7) Install the side panel.
7-8. Operating Controller Installation
Install the operating controller on the top face of the air 
intake section (space between the fan motor and the 
electrical component box). (Fig. 1-92)
(1) Fasten the operating controller to the ceiling
panel of the air intake section with the 2 supplied
screws (4×L13/32).
(2) Draw the lead wires into the electrical component
box and connect the operating controller 2 wires
(WHT, BLK) to the remote control wires in the
electrical component box.
(3) Connect the indicator section and the operating
controller using the 6P connector in the electrical
component box.
CAUTION
 Do not twist the operating
controller wires together
with the power supply
wires. Doing so can result
in malfunction.
   If electrical noise is
induced in the unit power
supply, take appropriate
measures, for example
installing a noise filter.
Fig. 1-91
Fig. 1-92
Cover A
Cover A Panel Indicator section
Side panel
 Indicator section
Cover B
(Not used when
 the indicator section
is installed.)
Air intake grille Grooves
Grooves
Operating controller
Electrical component box
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC








 
						

							1-104
1. Specifications
7-9. Electrical Wiring
7-10-1. How to use the test run setting (U1, T1 Types)
(1) Set DIP switch [DS] No. 1 on the wireless receiver
unit PCB from OFF to the ON position.
(2) Press the ON/OFF operation button on the
wireless remote controller.
(3) Make a test run using the air conditioner in
COOL or HEAT mode.
(4) During the test run, each of the 3 indicator lamps
on the indoor unit  ash.
(5) During the test run, the air conditioner runs
continuously and the thermostat does not control
the system.
(6) After the test run, be sure to reset DIP switch No. 1
back to the OFF position and check that no indicator
lamps are blinking.
(This receiver includes a 60-minute automatic OFF
timer function in order to prevent continuous test run.)
Fig. 1-93
WHT
BLK 1
2W1 (4.3 ft.)
WL Indoor PCB Operating controllerSignal receiving unit
Indicator section
W2
(0.7 ft.)W3
(4.3 ft.)
CN1CN2
Relay connectorCN1
BLU
YEL
PNK
RED
GRY
BLKBLU
YEL
PNK
RED
GRY
BLK
NOTE
  In case of 4-way Cassette type, test run operation is not possible without the ceiling panel installation.
  To protect the air conditioner from overloading, the outdoor unit will not start running for 3 minutes after 
power is applied or the air conditioner is turned off and then back on.
  When the air conditioner fails to start the test run, 1 or more of the 3 alarm indicator lamps on the indoor 
unit will flash (See next section).
  When the DIP switch is set to “TEST – ON,” temperature control from the wireless remote controller is disabled.
Do not use this setting at any time other than for the test run. Doing so will place an excessive load on the system.
  To avoid placing an excessive load on the equipment, use this function only when conducting the test run.
Fig. 1-94
1
1
ADR1.TEST RUN
2.PCB CHK.
3.RCU: MAIN
   RCU: SUB
4.NORMAL
   ALL 
DIP switch
No. 1Address
switchON/OFF
operation
button
All OFF(  ) for
initial settings.
234
23
456
Flap
button
Connection method
(1) Connect W1 to the indoor PCB WL connector.
(2) Connect W3 from the indicator section with W2 from the operating controller using the relay connector.
7-10. Test Run Switch
The test run switch is located in the operating control unit.
See the Installation Instractions attached to the outdoor unit.
1
4.@1$J@64MFUUFSJOEC


4.@1$J@64MFUUFSJOEC