Panasonic Air Conditioner S 24mu2u6_s 36mu2u6_s 12mt2u6_s 18mt2u6_s 24mt2u6 Operating Instructions

							F570001
Operating InstructionsAir 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.
Indoor Units
12 18 24
Nominal Capacity
T2
* Panel (optional parts) Type T2
Type U2
Ceiling 36
U-36LE1U6 52
U-52LE1U6Indoor Unit Type
Type
Outdoor Units
Nominal Capacity
ME2 2WAY VRF System
MF2 3WAY VRF System
LE1 Mini VRF SystemOutdoor Unit Type
Type 36
72
U-72ME2U9
U-72MF2U9 96
U-96ME2U9
U-96MF2U9 120
U-120ME2U9 144
U-144ME2U9
U-120MF2U9 U-144MF2U9
S-12MT2U6
S-18MT2U6S-24MT2U6
U2
4-Way Cassette 36 x 36
S-24MU2U6
(CZ-36KPU3U)* S-36MU2U6 
(CZ-36KPU3U)*
 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.
High-spec Wired Remote Controller (Optional parts) .................................................................... 5
 Refer to the Operating Instructions attached to the optional High-spec Wired Remote Controller.
ADJUSTING AIRFLOW DIRECTION ............................................................................................ 6
ADJUSTING AIRFLOW DIRECTION FOR MULTIPLE INDOOR UNITS USING SINGLE REMOTE 
CONTROLLER (WIRED)............................................................................................................... 6
SPECIAL REMARKS .................................................................................................................... 7
CARE AND CLEANING ................................................................................................................ 8
TROUBLESHOOTING .................................................................................................................. 9
CHECK BEFORE REQUIRING SERVICES ................................................................................ 10
TIPS FOR ENERGY SAVING ..................................................................................................... 10
SPECIFICATIONS ....................................................................................................................... 11
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 of the unit.
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
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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.
NOTE
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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 –/– 75/24 64/17.8
Min. 59/15 –/– 14/-10 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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NAMES OF PARTS
Timer Remote Controller (Optional parts)
High-spec Wired Remote Controller (Optional parts) INDOOR UNIT
Type U2 (4-Way Cassette 36" x 36")Type T2 (Ceiling)
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.
Ceiling panel 
(optional)
Air intake grille 
(air intake)Water drain
Air outlet 
(4 locations)
Air outlet
Water drain
Air intake grille 
(air intake)
NOTE
(CZ-RTC4)
NOTE
(CZ-RTC3)
(CZ-RTC5)
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ADJUSTING AIRFLOW DIRECTION 
ADJUSTING AIRFLOW DIRECTION FOR MULTIPLE 
INDOOR UNITS USING SINGLE REMOTE CONTROLLER 
(WIRED)
„4-Way Cassette 36" x 36" (Type U2)
This air conditioners are 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.
 The air outlet flap can be easily removed and washed with water.
 Be sure to always stop operation before removing the flap. 
 After washing with water, allow it to dry, and then remount it with the arrow facing outward.
„Ceiling (Type T2)
A. Vertical directions (automatic)
This air conditioner is equipped with an auto flap. You can set the airflow direction to a specific 
angle or to the sweep mode using the remote controller. (Refer to the description of the remote 
controller.)
Do not move the flap with your hands.
B. 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).
 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 
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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SPECIAL REMARKS
Heating Performance Since this air conditioner utilizes outside air for heating, its heating performance 
deteriorates as outside temperature decreases. (Due to heat pump system)
 It will take some time until the room becomes warmer after heating operation started. (Due 
to hot air circulation system in order to heat a whole room)
Defrosting This appliance may start defrosting operation to melt frost form in the outdoor unit during 
long hour heating operation mode.
The indoor unit fan will stop for about 5 to 10 minutes at this time.
Heating StandbyThe remote controller shows “ ” (Heating standby) on the display in the following mode and 
the indoor unit fan may be controlled.
 When operation started (Indoor unit fan stops for maximum 6 minutes.)
 When Thermostat activated
 When defrosting (Indoor unit fan stops.)
When Heating Operation
Started (Only 3WAY VRF)When changed to heating mode from stopped or cooling operation mode, the unit does not 
work for about 3 minutes for the sake of self-protection.
It may take about 5 to 10 minutes until the hot air is delivered after starting the heating 
operation.
Oil RecoveryThe indoor unit fan may stop or run at a slow speed in order to recover the oil in the system 
every 1 to 3 hours during cooling or heating operation.
The unit will automatically resume the original operation after about 5 to 10 minutes.
Remote Control SensorThe temperature sensor in the indoor unit normally senses the room temperature and can also 
sense the ambient temperature of the remote controller.
For the details, consult the shop you purchased.
Should the power failure
occurs while the
unit is runningWhen the unit automatically resumes operation after temporary power failure, it uses the same 
settings before the power was cut off.
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CARE AND CLEANING
Do not attempt to clean inside the unit by yourself.
Refer to the section “Care and Cleaning” in the Installation Instructions.
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.
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 a mild liquid detergent. When 
cleaning the air outlet side, be careful not to force the vanes out of place.
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 every 
year. Consult your dealer or service center.
Air filterThe air filter collects dust and other particles from the air and should be cleaned at regular 
intervals when the filter indication ( ) on the display of the remote controller (wired type) 
shows that the filter needs cleaning. If the filter gets blocked, the efficiency of the air conditioner 
drops greatly.
The frequency with which the filter should be cleaned depends on the environment in which the 
unit is used.
NOTE
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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
Symptom 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 rotate 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.
Poor cooling or heating performance The indoor unit is initially designed to control the indoor temperature detected 
by the built-in room sensor inside the indoor unit.
Due to indoor unit installation position, however, the built-in sensor may 
occasionally sense temperature improperly; for example, temperature 
difference between the ceiling and floor, lighting apparatus, electric fan, 
windows or waist-high partition walls, etc.
In this case, the unit does not operate properly at the desired temperature.
You may change the use of the temperature sensor inside the indoor unit to 
that of the remote controller.
Then the desired room temperature can be controlled properly.
For details, consult your dealer.
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CHECK BEFORE REQUIRING SERVICES
If your air conditioner still does not work properly although you checked the points as described above, first stop the operation and 
turn off the power switch. Then contact your dealer and report the serial number and symptom. Never repair your air conditioner by 
yourself since it is very dangerous for you to do so. You also report if the inspection mark   and the letters E, F, H, L, P in 
combination with the numbers appear on the LCD of the remote controller.
TIPS FOR ENERGY SAVING
Avoid
• Do not block the air intake and outlet of the unit. If either is obstructed, the unit will not work well, and may be damaged.
 Do not let direct sunlight into the room. Use sunshades, blinds or curtains. If the walls and ceiling of the room are warmed by the 
sun, it will take longer to cool the room.
Do
 Always try to keep the air filter clean. (Refer to “CARE AND CLEANING”.) A clogged filter will impair the performance of the unit.
 To prevent conditioned air from escaping, keep windows, doors and any other openings closed.
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 power is restored using the 
same settings before the power was interrupted.
Symptom Cause Remedy
Air conditioner does not run at 
all although power is turned 
on.Power failure or after power failure Press ON/OFF operation button on remote controller 
again.
Operation button is turned off.  Switch on power if breaker is turned off.
 If breaker has been tripped, consult your dealer 
without turning it on.
Fuse blow out. If blown out, consult your dealer.
Poor cooling or heating 
performanceAir intake or air discharge port of indoor 
and outdoor units is clogged with dust or 
obstacles.Remove dust or obstruction.
Wind speed switch is set to “Low”. Change to “High” or “Strong”.
Improper temperature settings Refer to “TIPS FOR ENERGY SAVING”.
Room is exposed to direct sunlight in 
cooling mode.
Doors and /or windows are open.
Air filter is clogged. Refer to “CARE AND CLEANING”.
Too much heat sources in room in cooling 
mode.Use minimum heat sources and in a short time.
Too many people in room in cooling mode. Reduce temperature settings or change to “High” or 
“Strong”.
NOTE
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