Panasonic VRF System Air Conditioner S 07mk2u6_s 09mk2u6_s 12mk2u6_s 12my2u6_s 18my2u6 Operating Instructions

							F569695
Operating Instructions
VRF System Air Conditioner
Model No.
This air conditioner uses the refrigerant R410A.
Before operating the unit, read these operating instructions thoroughly \
and keep them for future reference.
* Salt-Air Damage Resistant Specifications.
Indoor Unit
7 912
Nominal Capacity
Y2 4-Way Cassette 60x60
K2
Wall Mounted
S-07MK2U6
36
U-36LE1U6
U-36LE1U6E* 52
U-52LE1U6
U-52LE1U6E* S-09MK2U6
S-12MK2U6
S-12MY2U6Indoor Unit Type
Type
Outdoor Units
Nominal Capacity
ME2 2WAY VRF System
MF1 3WAY VRF System
LE1 Mini VRF SystemOutdoor Unit Type
Type 18
S-18MY2U6
72
U-72ME2U9
U-72MF1U9 96
U-96ME2U9
U-96MF1U9 120
U-120ME2U9 144
U-144ME2U9
* Shows K2 type (Wall Mounted)
 Connectable outdoor unit lineup This booklet is the operating instructions for indoor unit. Regarding th\
e outdoor unit, see the operating 
instructions supplied with the outdoor unit. 
						

							2
CONTENTS
Page
PRODUCT INFORMATION ........................................................................................................... 2
ALERT SYMBOLS......................................................................................................................... 2
INSTALLATION LOCATION ...........................................................................................................3
ELECTRICAL REQUIREMENTS .................................................................................................. 3
SAFETY INSTRUCTIONS.............................................................................................................3
OPERATION CONDITION ............................................................................................................4
NAMES OF PARTS ....................................................................................................................... 5
Timer Remote Controller (Optional parts) ..................................................................................... 5
 Refer to the Operating Instructions attached to the optional Timer Remote Controller................. 5
High-spec Wired Remote Controller (Optional parts) .................................................................... 5
 Refer to the Operating Instructions attached to the optional High-spec Wired Remote 
Controller. ..................................................................................................................................... 5
Wireless Remote Controller (Optional parts)................................................................................. 5
 Refer to the Operating Instructions attached to the optional Wireless Remote Controller. ........... 5
ADJUSTING AIRFLOW DIRECTION ............................................................................................ 6
ADJUSTING AIRFLOW DIRECTION FOR MULTIPLE 
INDOOR UNITS USING SINGLE REMOTE CONTROLLER (WIRED)......................................... 7
SPECIAL REMARKS .................................................................................................................... 8
CARE AND CLEANING ................................................................................................................ 8
TROUBLESHOOTING ................................................................................................................10
CHECK BEFORE REQUIRING SERVICES ................................................................................ 11
TIPS FOR ENERGY SAVING ..................................................................................................... 11
SPECIFICATIONS ....................................................................................................................... 12
PRODUCT INFORMATION
If you have problems or questions concerning your Air Conditioner, you will need the following 
information. Model and serial numbers are on the nameplate.
Model No.  _________________________________ Serial No. _______________________
Date of purchase ______________________________________________________________
Dealer’s address ______________________________________________________________
Phone number ________________________________________________________________
ALERT SYMBOLS
The following symbols used in this manual, alert you to potentially dangerous conditions to 
users, service personnel or the appliance:
This symbol refers to a hazard or unsafe practice 
which can result in severe personal injury or 
death.
This symbol refers to a hazard or unsafe practice 
which can result in personal injury or product or 
property damage.
NOTE
NOTE
NOTE
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INSTALLATION LOCATION
• We recommend that this air conditioner be installed properly by qualified installation 
technicians in accordance with the Installation Instructions provided with the unit.
 Before installation, check that the voltage of the electric supply in your home or office is the same 
as the voltage shown on the nameplate.
ELECTRICAL REQUIREMENTS
SAFETY INSTRUCTIONS
 Read these Operating Instructions carefully before using this air conditioner. If you still 
have any difficulties or problems, consult your dealer for help.
 This air conditioner is designed to give you comfortable room conditions. Use this only for 
its intended purpose as described in these Operating Instructions.  Do not install this air conditioner where there are fumes or flammable gases, or in an 
extremely humid space such as a greenhouse.
 Do not install the air conditioner where excessively high heat-generating objects 
are placed.
Avoid:To protect the air conditioner from heavy corrosion, avoid installing the outdoor unit where 
salty sea water can splash directly onto it or in sulphurous air near a spa.
 All wiring must conform to the local electrical codes. Consult your dealer or a qualified 
electrician for details.
 It is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or 
Residual Current Device (RCD) to prevent electric shock or fire.
 Each unit must be properly grounded with a ground (or earth) wire or through the supply 
wiring.
 Wiring must be done by a qualified electrician.
To warm up the system, the power mains must be turned on 
at least five (5) hours before operation. Leave the power 
mains ON unless you will not be using this appliance for an 
extended period.
Pull off the power plug from a receptacle, or switch off the breaker, or switch off the power 
disconnecting mean to isolate the air conditioner from the main power supply when not in use 
for a long time.
 Confirm to authorized dealer or specialist on usage of specified refrigerant type. 
Using of refrigerant other than the specified type may cause product damage, burst 
and injury etc.
 Never touch the unit with wet hands.
 Never use or store gasoline or other flammable vapor or liquid near the air 
conditioner — it is very dangerous.
 Do not use this appliance in a potentially explosive atmosphere.
 This air conditioner has no ventilator for intaking fresh air from outdoors. You must 
open doors or windows frequently when you use gas or oil heating appliances in 
the same room, which consume a lot of oxygen from the air. Otherwise there is a 
risk of suffocation in an extreme case.
 To prevent possible hazards from insulation failure, the unit must be 
grounded.
 Do not clean inside the indoor and outdoor units by users. Engage 
authorized dealer or specialist for cleaning.
 In case of malfunction of this appliance, do not repair by yourself. Contact to the 
sales dealer or service dealer for a repair.
 Check for a leaking refrigerant! Refrigerant gas may produce a toxic gas if it comes 
in contact with fire.
Power mains
ON
NOTE
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							4
OPERATION CONDITION
 For safety, be sure to turn the air conditioner off and also to disconnect the 
power before cleaning or servicing.
 Pull off the power plug from a receptacle, or switch off the breaker, or switch 
off the power disconnecting mean to isolate the air conditioner from the 
main power supply in case of emergency.
 Do not turn the air conditioner on and off from the power mains switch. Use the ON/
OFF operation button.
 Do not stick anything into the air outlet of the outdoor unit. 
This is dangerous because the fan is rotating at high speed.
 Do not touch the air inlet or the sharp aluminum 
fins of the outdoor unit. You may get injured.
 Keep the fire alarm and the air outlet at least 
5 feet (1.5 m) away from the unit.
 Do not let children play with the air conditioner.
 Do not cool or heat the room too much if babies or invalids are present.
 Do not sit or step on the unit. 
You may fall down accidentally.
 Do not stick any object 
into the FAN CASE. 
You may be injured and 
the unit may be damaged.
The compressor may occasionally stop during thunderstorms. 
This is not a mechanical failure. The unit automatically recovers after a few minutes.
Use this air conditioner under the following temperature range.
3 way system
2 way system
Mini VRF system
* DBT: Dry bulb temperature
* WBT: Wet bulb temperature
Temperature range (°F/°C)Indoor Outdoor
*DBT *WBT *DBT *WBT
Heating & CoolingMax. 86/30 –/– 86/30 75/24
Min. 59/15 –/– 16/-8.8 14/-10
CoolingMax. 90/32 77/25 115/46 –/–
Min. 64/17.8 57/14 14/-10 –/–
HeatingMax. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
Temperature range (°F/°C)Indoor Outdoor
*DBT *WBT *DBT *WBT
CoolingMax. 90/32 77/25 122/50 –/–
Min. 64/17.8 57/14 14/-10 –/–
HeatingMax. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
Temperature range (°F/°C)Indoor Outdoor
*DBT *WBT *DBT *WBT
CoolingMax. 90/32 77/25 115/46 –/–
Min. 64/17.8 57/14 14/-10 –/–
HeatingMax. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
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							5
NAMES OF PARTS
INDOOR UNIT
Timer Remote Controller (Optional parts)
High-spec Wired Remote Controller (Optional parts)
Wireless Remote Controller (Optional parts)
Refer to the Operating Instructions attached 
to the optional Timer Remote Controller.
Refer to the Operating Instructions attached 
to the optional High-spec Wired Remote 
Controller.
Refer to the Operating Instructions attached 
to the optional Wireless Remote Controller.
OPE
N
CLOS
E
CLOS
EOPE
N
Intake grilleControl Panel
Airflow direction 
louverAir is discharged 
evenlyReceiver
Emergency button
Vertical airflow 
direction louverHorizontal airflow 
direction louver Front panelAir filters
Receiver
Emergency button •  Do not adjust 
by hand.
adjustable.
Y2 type  (4-WAY CASSETTE 60×60)
K2 type  (WALL MOUNTED)
NOTE
(CZ-RTC2)
NOTE
(CZ-RTC3)
NOTE
(Wireless type: 
available for all 
indoor units)
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							6
ADJUSTING AIRFLOW DIRECTION
The functions differ depending on the indoor unit used.  The airflow direction cannot be set using 
the remote controller for any unit which is not listed below.
Y2 type, K2 type:
 Never use your hands to move the flap (vertical airflow flap) that is controlled using the remote 
controller.
 When the air conditioner is turned off, the flap automatically moves toward the direction of 
closing.
 The flap (vertical airflow flap) moves to the upward position when performing the standby 
operation for heating. The swing operation is made after the standby operation for heating is 
released, but swing is indicated on the remote controller even during the standby operation for 
heating.
Setting the airflow
directionThe airflow direction changes each time the  FLAP button is pressed during operation.
To activate the swing
operationPress the FLAP button to set the flap (vertical airflow flap) to the downward position, and then press 
the FLAP button again. This displays  , and the airflow automatically swings up and down.
To stop the swing
operationPress the FLAP button again during the flap swing operation to stop the flap at the desired position. 
Then, the airflow can be set from the top position by pressing the FLAP button again.
Indicator when swing operation is stopped
During cooling or drying operation, the flap will not stop at the downward position. Even if the flap is 
stopped at the downward position during the swing operation, it will not stop until it moves to the 
third position from the top.
Heating Cooling and drying Fan operation All operations
Set the flap (vertical airflow flap) to the downward 
position. If the flap is set to the upward position, 
the warm air may not reach the floor.The flap (vertical airflow flap) can 
be set to one of three positions.
Initial settingInitial settingInitial settingContinuous 
operation
Fan and heating Cooling and drying
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ADJUSTING AIRFLOW DIRECTION (CONTINUED)
ADJUSTING AIRFLOW DIRECTION FOR MULTIPLE 
INDOOR UNITS USING SINGLE REMOTE CONTROLLER 
(WIRED)
„4-way cassette (Y2)
Y2 type air conditioner is equipped with auto flaps.
You can set the airflow direction to a specific angle or to the sweep mode using the remote 
controller.
Do not move the flap with your hands.
„Wall mounted type (K2)
Vertical directions (automatic)
Confirm that the remote controller has been turned on. Press the FLAP button to start the flap 
moving up and down. If you want to stop the flap movement and to direct the air in the desired 
direction, press the FLAP button again. In the cool mode, do not direct the flap down and move out 
of the cooling zone “A”, otherwise, condensation may drip on to the floor. Zone ‘‘A’’ is the 
recommended flap position for cooling. 
When operating continuously in the fixed airflow direction setting for about an hour, the airflow 
direction is automatically controlled and the flap position is changed. The airflow direction may be 
different from the display on the remote controller.
Do not move the flap with your hands.
Horizontal directions (manual)
The horizontal airflow direction can be adjusted manually by moving the vertical vanes to the left or 
right.
 If multiple indoor units are connected to a remote controller, the airflow direction can be set 
for each indoor unit by selecting the indoor units (see the operation below).
Auto Flap ( ) button To set the airflow for individual units, press the UNIT button. Display shows the indoor unit 
number under group control. Set the airflow direction for the indoor unit that is shown on the 
display.
 Each time UNIT is pressed, the indicator changes in the order shown below.
 When nothing is displayed, you can make the setting for all indoor units in one operation.
 The unit number is displayed as Outdoor Unit Number–Indoor Unit Number. It varies 
depending on the number of units under group control.
One outdoor unit and eight indoor units                                   Two outdoor units and four indoor units 
Indoor unit
Zone ‘‘B’’ for 
heating
Zone 
‘‘A’’ for 
cooling
No display
Unit No.
1–1Unit No.
1–2Unit No.
1–3Unit No.
1–8No 
displayUnit 
No.
1–1Unit 
No.
1–2Unit 
No.
1–3Unit 
No.
2–4 Unit 
No.
1–4Unit 
No.
2–1
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							8
SPECIAL REMARKS
CARE AND CLEANING
How it works Once the room temperature reaches the level that was set, the unit repeats the cycle of 
turning on and off automatically.
 In order to prevent the humidity in the room from rising again, the indoor fan also turns off 
when the unit stops operating.
 The fan speed is set to ‘‘LO.’’ automatically, and cannot be adjusted.
 ‘‘DRY’’ operation is not possible if the outdoor temperature is 15 °C or less.
Heating performance Because this appliance heats a room by utilizing the heat of the outside air (heat pump 
system), the heating efficiency will fall off when the outdoor temperature is very low. If 
sufficient heat cannot be obtained with this heat pump, use another heating appliance in 
conjunction with this unit.
Defrosting When the outdoor temperature is low, frost or ice may form on the outdoor heat exchanger 
coil, reducing the heating performance. When this happens, a microcomputer-controlled 
defrosting system operates. At the same time, the fan on the indoor unit stops (or runs at 
very low speed in some cases) and the ‘‘STANDBY’’ indicator appears on the display until 
defrosting is completed. Heating operation then restarts after several minutes. (This interval 
will vary slightly depending upon the outdoor temperature and the way in which frost forms.)
(standby) on the
display For several minutes after the start of heating operation, the indoor fan will not start running 
(or it will run at very low speed in some cases) until the indoor heat exchanger coil has 
warmed up sufficiently. This is because a cold draft prevention system is operating. During 
this period, the ‘‘ ’’ (standby) indicator remains displayed.
 ‘‘ ’’ (standby) remains displayed during defrosting or when the compressor has been 
turned off (or when the unit is running at very low speed) by the thermostat when the 
system is in the heating mode.
 Upon completion of defrosting and when the compressor is turned on again, ‘‘ ’’ 
(standby) will turn off automatically as heating operation resumes.
Should the power fail while the unit is running
If the power supply for this unit is temporarily cut off, the unit will automatically resume 
operation (once the power is restored) using the same settings before the power was cut off.
1. For safety, be sure to turn the air conditioner off and also to disconnect the power 
before cleaning.
2. Do not pour water on the indoor unit to clean it. This will damage the internal 
components and cause an electric shock hazard.
1. Never use solvents or harsh chemicals when cleaning the indoor unit. Do not wipe 
plastic parts using very hot water.
2. Some metal edges and the fins are sharp and may cause injury if handled 
improperly; be especially careful when you clean these parts.
3. The internal coil and other components of the outdoor unit must be cleaned 
periodically. Consult your dealer or service center.
Air intake and outlet side
(Indoor unit)Clean the air intake and outlet side of the indoor unit with a vacuum cleaner brush, or wipe 
them with a clean, soft cloth.
If these parts are stained, use a clean cloth moistened with water. When cleaning the air outlet 
side, be careful not to force the vanes out of place.
‘‘DRY’’ Operation
Heating Operation
NOTE
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							9
• Switch off  the power supply before cleaning.
 Do not touch the aluminium fin, sharp parts may cause injury.
ALUMINIUM FIN
Remove Front Panel
Close Front Panel
CLEANING  INSTRUCTIONS
FRONT PANEL
INDOOR UNIT
RemoveRemoveRemove

front panel.


front panel to close it 
securely. 

detergent.

and to reduce power consumption.

seasonal inspection.
HINTS
Wipe the unit gently with a 
soft, dry cloth. 
AIR FILTERS


damage to the filter surface.

from fire or direct sunlight.

Air Filter Maintenance ex.) Timer Remote Controller
Filter indicator
Filter reset button
After Cleaning
It is recommended that the air filter be cleaned when the 
(Filter) appears on the display. Clean the filter frequently for 
best performance in the area of dusty or oil spots regardless 
of filter status.
If you wish to use a different (optional) remote controller, refer to 
the attached instruction manual.
1.  After the air filter is cleaned, reinstall it in its original 
position.
Be sure to reinstall in reverse order.
2.  Press the Filter reset button.
The      (Filter) indicator on the display goes out.
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							10
TROUBLESHOOTING
If your air conditioner does not work properly, first check the following points before requesting service. If it still does not work properly, 
contact your dealer or a service center.
INDOOR UNIT
OUTDOOR UNITSymptom Cause
Noise Sound like streaming water during 
operation or after operation Sound of refrigerant liquid flowing inside unit
 Sound of drainage water through drain pipe
Cracking noise during operation or 
when operation stops.Cracking sound due to temperature changes of parts
Odor Discharged air is smelled during 
operation.Indoor odor components, cigarette odor and cosmetic odor accumurated in 
the air conditioner and its air is discharged.
Unit inside is dusty. Consult your dealer.
Dewdrop Dewdrop gets accumurated near air 
discharge during operationIndoor moisture is cooled by cool wind and accumulated by dewdrop.
Fog Fog occurs during operation in cooling 
mode.
(Places where large amounts of oil 
mist exist at restaurants.) Cleaning is necessary because unit inside (heat exchanger) is dirty. 
Consult your dealer as technical engineering is required.
 During defrost operation
Fan is rotating for a while even though operation 
stops. Fan rotating makes operation smoothly.
 Fan may sometimes rotates because of drying heat exchanger due to 
settings.
Wind-direction changes while operating. 
Wind-direction setting cannot be made.
Wind-direction cannot be changed. When air discharge temperature is low or during defrost operation, 
horizontal wind flow is made automatically.
 Flap position is occasionally set up individually.
When wind-direction is changed, flap operates 
several times and stops at designated position.When wind-direction is changed, flap operates after searching for standard 
position.
Dust Dust accumulation inside indoor unit is discharged.
At the initial high-speed operation, the fan may 
sometimes rotate faster (for 3 to 30 minutes) than 
the setting speed.This is for operation check in order to confirm whether the fan motor rotation is 
within use range.
Symptom Cause
No 
operationWhen power is turned ON instantly. Operation is not activated for the first approx. 3 minutes because compressor 
protection circuit is activated.
When operation is stopped and 
resumed immediately.
Noise Noise often occurs in heating mode. During defrost operation
Steam Steam often occurs in heating mode.
When stopped by remote controller, outdoor unit fan 
is sometimes operating for a while even though 
outdoor compressor is stopped.Fan rotating makes operation smoothly.
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