Panasonic S-12MT2U6 User manual

F570001
Operating Instructions
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.
Indoor Units
12 18 24
Nominal Capacity
T2
* Panel (optional parts)
Type T2Type U2
Ceiling
36
U-36LE1U6
52
U-52LE1U6
Indoor Unit TypeType
Outdoor Units
Nominal Capacity
ME2 2WAY VRF System
MF2 3WAY VRF System
LE1 Mini VRF System
Outdoor Unit TypeType
36
72
U-72ME2U9
U-72MF2U9
96
U-96ME2U9
U-96MF2U9
120
U-120ME2U9
144
U-144ME2U9
U-120MF2U9 U-144MF2U9
S-12MT2U6 S-18MT2U6 S-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 the 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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3
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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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 & Cooling Max. 86/30 –/– 75/24 64/17.8
Min. 59/15 –/– 14/-10 14/-10
Cooling Max. 90/32 77/25 115/46 –/–
Min. 64/17.8 57/14 14/-10 –/–
Heating Max. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
Temperature range (°F/°C) Indoor Outdoor
*DBT *WBT *DBT *WBT
Cooling Max. 90/32 77/25 122/50 –/–
Min. 64/17.8 57/14 14/-10 –/–
Heating Max. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
Temperature range (°F/°C) Indoor Outdoor
*DBT *WBT *DBT *WBT
Cooling Max. 90/32 77/25 115/46 –/–
Min. 64/17.8 57/14 14/-10 –/–
Heating Max. 86/30 –/– 75/24 64/17.8
Min. 61/16 –/– -4/-20 -4/-20
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5
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
A
(CZ-RTC4)
NOTE
(CZ-RTC3)
(CZ-RTC5)
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6
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.
1–1
Unit No.
1–2
Unit No.
1–3
Unit No.
1–8
No
display
Unit
No.
1–1
Unit
No.
1–2
Unit
No.
1–3
Unit
No.
2–4
Unit
No.
1–4
Unit
No.
2–1
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7
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 Standby The 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 Recovery The 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 Sensor The 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 running
When 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 filter The 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 operation
Indoor 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
performance
Air 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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SPECIFICATIONS
4-Way Cassette 36" x 36" (Type U2)
* Values include the dimension and weight of an optional ceiling panel.
Ceiling (Type T2)
Model Name S-24MU2U6 S-36MU2U6
Power Source 208 / 230 V, 60 Hz, 1PH
Cooling Capacity BTU/h 25,000 36,000
kW 7.3 10.6
Heating Capacity BTU/h 27,000 39,000
kW 7.9 11.4
Sound Pressure Level (High/Medium/Low) dB(A) 37/32/29 44/38/34
Unit Dimensions*
H : inch (mm) 11-7/16 (290) 13-29/32 (353)
W : inch (mm) 37-13/32 (950) 37-13/32 (950)
D : inch (mm) 37-13/32 (950) 37-13/32 (950)
Net Weight: unit + panel lbs. (kg)53+9 (24+4) 60+9 (27+4)
Model Name S-12MT2U6 S-18MT2U6 S-24MT2U6
Power Source 208 / 230 V, 60 Hz, 1PH
Cooling Capacity BTU/h 12,000 19,000 25,000
kW 3.5 5.6 7.3
Heating Capacity BTU/h 14,000 21,000 27,000
kW 4.1 6.2 7.9
Sound Pressure Level (High/Medium/Low) dB(A) 36/32/30 37/33/30 39/35/33
Unit Dimensions
H : inch (mm) 9-1/4 (235) 9-1/4 (235) 9-1/4 (235)
W : inch (mm) 37-51/64 (960) 37-51/64 (960) 50-13/64 (1,275)
D : inch (mm) 27-11/64 (690) 27-11/64 (690) 27-11/64 (690)
Net Weight lbs. (kg)60 (27) 60 (27) 73 (33)
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F570001
BE0515-10615
© Panasonic Corporation 2015
Printed in China