Mitsubishi Electric GUG-02SL-E User manual

DIRECT EXPANSION COIL UNIT FOR LOSSNAY
GUG-01SL-E
GUG-02SL-E
GUG-03SL-E
MODELS:
1605876HE5601
Operating Instructions

Eng-1
English
Safety precautions
The following signs indicate that death or serious injury may be caused by failure to heed the precautions described below.
Please read this manual carefully before use for proper and safe use.
Do not attempt to install the product by yourself.
GUG-01SL-E
GUG-02SL-E
GUG-03SL-E
DIRECT EXPANSION COIL UNIT FOR LOSSNAY
MODELS:
Operating Instructions (For the user)
WARNING
Prohibited
Do not turn the unit on or off when ammable gas has leaked.
(It could catch re or cause explosion with sparks released from electric contractor.)
Open windows to ventilate.
Do not
disassemble
Do not modify or disassemble.
(It could cause re, electric shock or injury.)
Do not wet
Do not apply water to the unit and remote controller.
(Electrical shock can result.)
Do not touch
Do not poke your ngers or sticks into the air intake and outlet while the product is
operating.
(Failure to heed this warning may result in injury.)
Wet hands
Prohibited
Do not operate with wet hands.
(Electrical shock can result.)
R410A only
Contents
Safety precautions.........................................................1
Names of the parts ........................................................3
System conguration.....................................................4
Remote controller (PZ-01RC)........................................6
Maintenance................................................................10
Specications .............................................................. 11
Relocation, installation place....................................... 11
Maintenance and lifetime............................................. 11
After-sales servicing .................................................... 11

Eng-2
Safety precautions (continued)
CAUTION
Prohibited
Do not use at a place where exposed to high temperatures (40˚C or higher), naked ames,
or in environment with heavy fumes.
(It could cause re.)
When installing or relocating, or servicing the unit, use only the specied refrigerant
(R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not
allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high pressure in
the refrigerant line, and may result in an explosion and other hazards.
The use of any refrigerant other than that specied for the system will cause mechanical
failure or system malfunction or unit breakdown. In the worst case, this could lead to a
serious impediment to securing product safety.
Do not install objects under the unit that cause trouble when they get wet.
(Drain blockage due to dust, high humidity (80 % or higher) or prolonged operation during air
conditioning may cause water to drip and get household belongings wet or dirty.)
In winter, do not operate the unit in bypass mode when heating.
(This may cause dew condensation water to drip and dirty the ceiling surface.)
Do not touch the refrigerant pipes with your bare hands during operation.
(Failure to heed this warning may cause frostbite or burns.)
Never use chemical substances such as detergents during cleaning and maintenance.
(Failure to heed this warning may deform or split the unit.)
The instructions
given must be
followed.
Securely install parts after maintenance.
(It could cause injury if parts fall.)
Put on gloves during maintenance.
(It could cause injury.)
Make sure the power supply isolator is turned off when the unit is not used for a long
period of time.
(It could cause electric shock, power leakage, or re as a result of deteriorated insulation.)
After disinfecting indoors with chemicals, be sure to ventilate to fully discharge
chemicals and gases emitted from chemicals before starting the unit.
(Chemicals or gases emitted from chemicals adhering to or being sucked into the unit may
corrode or deform the unit.)
When disinfecting indoors with chemicals, stop operation and cover the unit with a sheet
to prevent the unit from being splashed with chemicals.
(Chemicals or gases emitted from the chemicals adhering to the unit may deform the unit.
Chemicals also y in all directions, which is dangerous.)
WARNING
The instructions
given must be
followed.
Use the specied power supply and voltage.
(Use of incorrect power supply could cause re or electric shock.)
Make sure the power supply isolator is turned off on the power distribution panel before
starting maintenance.
(It could cause electric shock or injury if it is turned on.)
When any abnormal conditions (burning smell, or others) are observed, stop operation,
turn off the power supply isolator on the power distribution panel and consult your
dealer.
(Continuing operation under such conditions could cause electric shock, re, or damage.)
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent
or similarly qualied persons in order to avoid a hazard.

Eng-3
English
Names of the parts
Heat exchanger
Drain pump
Control box
Supply air thermistor
(Only for GUG-02 and 03SL-E)
Note
• The drain pump always runs in the cooling mode and continues to run for
six minutes after the unit stops.
The instructions
given must be
followed.
Refrigerant (Freon gas) warning
If the refrigerant leaks and comes into contact with a naked ame, toxic gas may be generated.
Since this coolant is heavier than the specic gravity of air, it is prone to build up at oor level in
rooms. This may lead to a lack of oxygen.
Corrective action if refrigerant leaks
If coolant leaks, turn the stove off and extinguish other ames. Ventilate the room fully by
opening doors and windows. Then, contact your dealer.
Avoid installation at the following sites
Installation at the following sites may corrode the unit, cause gas leaks, impair performance
signicantly, or break parts.
- Locations where inammable gas may leak
- Locations where substances that affect equipment such as sulfur-based gas, chlorine-based
gas, acid, alkali
- On moving objects such as vehicles and ships
- Locations where equipment that generates high frequency is located
- Locations where cosmetics and special sprays are frequently used
- Locations where large amounts of powder and moisture are generated
- Locations where there is soot in the air
- Locations where there is a large amount of salt such as seaside
- Locations where the outdoor unit can be blocked by accumulated snow
- Locations where sparks y, for example, near ames or from spatter when welding
This appliance is not intended for use by persons (including children) with reduced
physical sensory or mental capabilities, or lack of experience and knowledge, unless they
have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure that they do not play
with the appliance.
(This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge
if they have been given supervision or instruction concerning use of the appliance in a
safe way and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.)
Safety precautions (continued)
CAUTION

Eng-4
System conguration
System pattern X [ One remote controller ]
System pattern Y [ Two remote controllers ]
System pattern Z [ Interlocked with City Multi indoor unit (M-NET connection) ]
PZ-01RC
SA
RA
OA
EA
Outdoor unit
Lossnay unit
Power supply
Lossnay remote controller
(PZ-61DR-E)
Power supply
Dx-coil unit
PZ-01RC
SA
RA
OA
EA
Outdoor unit
Lossnay unit
Power supply
Lossnay remote controller
(PZ-61DR-E if necessary)
MA remote controller
(If necessary)
M-NET system controller
(If necessary)
City Multi indoor unit
(Interlocked with Lossnay)
Power supply
Dx-coil unit
[RA (Return Air) temperature control]
The system of the Lossnay unit and Dx-coil unit is disigned to maintain the return air temperature close to the setting temperature.
[SA (Supply Air) temperature control]
The system of the Lossnay unit and Dx-coil unit is disigned to maintain the supply air temperature close to the setting temperature.
*The setting temperature is recommended to be the same as or close to the setting temperature of the air conditioning unit.
Basic function of the system
PZ-01RC
SA
RA
OA
EA
Outdoor unit
Lossnay unit
Power supply
Power supply
Dx-coil unit
The dedicated remote controller for the Dx-coil
unit is described as “PZ-01RC” in this manual.
It is not an ofcial model name.
OA: Outdoor air
EA: Exhaust air
SA: Supply air
RA: Return air

Eng-5
English
System conguration (continued)
Operation from remote controllers
System pattern X System pattern Y System pattern Z
ON/OFF From PZ-01RC From PZ-01RC or
PZ-61DR-E *1
From one of the remote controllers or when the
indoor unit is switched ON/OFF *2
Operation mode
[Heating/Cooling/Fan]
From PZ-01RC From PZ-01RC Only from PZ-01RC *3
Temp. setting From PZ-01RC From PZ-01RC Only from PZ-01RC *3
Fan speed
[FS1 / FS2 / FS3 / FS4]
Fixed at FS4 *4 Can be changed from
PZ-61DR-E.
Can be changed from PZ-61DR-E, M-NET
system controller or MA remote controller (for
the indoor unit). The selectable fan speeds
depend on the model of remote controller.
Ventilation mode
[Heat recovery / Bypass / Auto]
Fixed at automatic mode *5 Can be changed from
PZ-61DR-E.
Can be changed from PZ-61DR-E or M-NET
system controller.
Remarks --Dx-coil unit cannot be monitored nor operated
from M-NET system controller.
*1: When one of the two remote controllers is switched ON/OFF, the other remote controller switches ON/OFF synchronously.
*2: When one of the three remote controllers is switched ON/OFF, the other remote controllers switch ON/OFF synchronously.
Or when the indoor unit is switched ON/OFF, the system of the Lossnay unit and Dx-coil unit switches ON/OFF synchronously.
*3: Cannot be controlled by M-NET system controller nor MA remote controller of the indoor unit.
*4: Fan speeds can be changed by 0-10VDC input or a volt free contact and can be xed at the fan speed 3 if necessary.
*5: The ventilation mode is set to the heat recovery mode during the heating and fan modes.
The ventilation mode can be set to the bypass ventilation mode by a volt-free contact if necessary.
Basic
operation
System pattern X System pattern Y Unit status
Dx-coil unit remote
controller (PZ-01RC)
Lossnay unit remote
controller (PZ-61DR-E)
Dx-coil unit remote
controller (PZ-01RC) Lossnay unit Dx-coil unit
ON ON ON
Heating
Cooling
Fan
Auto
Ventilating
Heating and Cooling:
Thermo-ON or thermo-OFF depending
on temperature conditions
Fan:
Always thermo-OFF (ventilation only)
Auto:
Only available at RA temp. control
Temperature
setting
Fan speed
Fixed at fan speed 4
(Fan speed can
be changed by the
external input to
Lossnay and be xed
at fan speed 3 if
necessary.)
Operating at
selected fan
speed
When Lossnay unit goes to fan speed
1 or 2 during thermo-ON, Dx-coil unit
becomes thermo-OFF forcibly.
Ventilation
mode
Fixed at automatic
mode
(The ventilation mode
is always the heat
recovery mode during
the heating and fan
mode.)
Operating
at selected
ventilation mode
The Dx-coil unit can be switched
thermo-ON in any ventilation mode
depending on temperature conditions.
OFF OFF OFF
For system pattern Z, the functions that can be used depend on the model of remote controllers.
When one of the two remote controllers is switched ON,
the other remote controller switches ON synchronously.
Cannot be changed by
PZ-61DR-E.
Heating/Cooling/Fan/
Auto
Cannot be changed by
PZ-61DR-E.
Fan speed 1, 2, 3 or 4 Cannot be changed by
PZ-01RC.
Heat recovery/Bypass/
Auto
Cannot be changed by
PZ-01RC.
When one of the two remote controllers is switched OFF,
the other remote controller switches OFF synchronously.

Eng-6
Remote controller (PZ-01RC)
1. Names and functions of controller components
Display The main display can be displayed in two different modes: "Full" and "Basic."
The factory setting is "Full."
Fri
Mode Temp.
Fan
Room
Cool Set temp.
Fri
Cool
Mode Temp.
Set temp.
1
2
3
4
5
4
3
dcba0
6
8
1
9
7
e
5
2
This function is not available.
4 Fan speed
Appears while power is ON.
Preset temperature appears here.
Appears when the ON/OFF operation is
centrally controlled.
Current time appears here.
Appears when the buttons are locked.
Dx-coil unit operation mode appears here.
Appears when the operation mode is
centrally controlled.
c
2 Preset temperature
6
0
1 Operation mode
7
Appears when the ON/OFF timer function is
enabled.
a
Appears when the preset temperature is
centrally controlled.
8
Appears when the Weekly timer is enabled.
b
Appears when the preset temperature range
is restricted.
e
Functions of the corresponding buttons
appear here.
5 Button function guide
Appears with room temperature.
d
3 Clock
Current room temperature appears here.
Please erase room temperatures in the
initial setting when the SA temp. control is
selected
Note
• For more information on how to use PZ-61DR-E, refer to the
instruction book of PZ-61DR-E.
9 Room temperature
Full mode
Basic mode
* All icons are displayed for explanation.
Function buttons
5
6
1234
7 8 9 0
Press to turn ON/OFF the Dx-coil unit.
1ON/OFF button
This lamp lights up in green while the unit
is in operation. It blinks while the remote
controller is starting up or when there is
an error.
Press to save the setting.
Main display: Press to change the operation
mode.
Main menu: Press to move the cursor down.
Press to return to the previous screen.
Main display : Press to decrease temperature.
Main menu: Press to move the cursor up.
Press to bring up the Main menu.
Main display : Press to increase temperature.
Main menu: Press to go to the previous page.
Operation settings will appear.
When the backlight is off, pressing any
button turns the backlight on and it
will stay lit for a certain period of time
depending on the screen.
Main display : Not available.
Main menu: Press to go to the next page.
6ON/OFF lamp
2SELECT button
7Function button F1
3RETURN button
8Function button F2
4MENU button
9Function button F3
5Backlit LCD
0Function button F4
Fri
Room
Set temp.
Mode Temp.
Cool
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
The functions of the function buttons
change depending on the screen. Refer
to the button function guide that appears
at the bottom of the LCD for the functions
they serve on a given screen.
When the system is centrally controlled,
the button function guide that
corresponds to the locked button will not
appear.
Main display Main menu
Function guide
7 8 9 0 7 8 9 0
Controller interface
•When the backlight is off, pressing any button turns the backlight on and
does not perform its function. (except for the ON/OFF button)
•Most settings (except ON/OFF, mode, temperature) can be made from the
Menu screen.

Eng-7
English
Remote controller (PZ-01RC) (continued)
2. Initial settings
From the Main display, press “MENU” button, select “Initial setting”, and make the remote controller settings on the screen that appears.
· Main/Sub
· Clock
· Main display
· Contrast
· Display details
-Clock
-Temperature
-Room temp.
-Auto mode (Auto cooling/heating operation)
· Auto mode (Auto cooling/heating operation)
· Administrator password
· Language selection
(1) Main/Sub setting
Please do not change from the factory setting.
Using two remote controllers connecting to one Dx-coil unit is prohibited.
(2) Clock setting
Clock setting is necessary for time display, weekly timer, timer setting and
error history.
Make sure to perform clock setting when the unit is used for the first time or
has not used for a long time.
(3) Main display setting
Use the F3 or F4 button to select the display mode “Full” or “Basic.” (The
factory setting is “Full.”)
(4) Remote controller display details setting
Make the settings for the remote-controller-related items as necessary.
Press the SELECT button to save the changes.
[1] Clock display
[2] Temperature unit setting
[3] Room temperature display
Please set to “No” for the SA temp. control. Refer to the installation manual.
[4] Auto mode (Auto cooling/heating operation) display setting (RA temp.
control only)
(The factory setting is “Yes”.)
· Yes: “AUTO COOL” or “AUTO HEAT” is displayed during Auto mode (Auto
cooling/heating operation).
· No: Only “AUTO” is displayed during Auto mode (Auto cooling/heating
operation).
(5) Auto mode (Auto cooling/heating operation) setting (RA temp. control only)
· Yes: The Auto mode (Auto cooling/heating operation) can be selected in
the operation mode setting.
· No: The Auto mode (Auto cooling/heating operation) cannot be selected in
the operation mode setting.
(The factory setting is “Yes”.)
(6) Administrator password setting
•The initial administrator password is “0000.” Change the default password
as necessary to prevent unauthorized access. Have the password available
for those who need it.
• If you forget your administrator password, you can initialize the password to
the default password “0000” by pressing and holding the F1 and F2 buttons
simultaneously for three seconds on the administrator password setting
screen.
• The administrator password is required to make the settings for the following
items.
· Timer setting
· Weekly timer setting
· Restriction setting
Select:
Cursor
Display details
Clock
Temperature
Room temp.
Auto mode
Change
No 24h
°C / °F / 1°C
Yes / No
Yes / No

Eng-8
Remote controller (PZ-01RC) (continued)
3. Basic operations
4. Troubleshooting
Operation mode icons
Turning ON and selecting operation mode
Preset temperature setting
Automatic cooling/heating operation
Press button 1 ( ON/OFF ).
Press button 7 ( F1 ) to go through the
operation modes.
Operation mode Preset temperature range
Cool (Supply air temp. control) 12 – 30 ºC (54 – 87 ºF)
Cool (Return air temp. control) 19 – 30 ºC (67 – 87 ºF)
Heat 17 – 28 ºC (63 – 83 ºF)
Auto cooling/heating operation 19 – 28 ºC (67 – 83 ºF)
Fan Not settable
Cool Fan Auto Heat
Auto cool Auto heat
* The temperature range restriction setting will be applied
preferentially, if any. If the setting value is outside of the range, a
message "Temp. range locked" will appear.
1
2The ON/OFF lamp and the LCD will light up.
F1
*1 Operation mode is available when the RA temperature
control is selected.
Cool Fan Heat
Press button 8 ( F2 ) to decrease the preset temperature.
Press button 9 ( F3 ) to increase the preset temperature.
* Pressing once changes the value by 1ºC (1ºF).
Press button 1 ( ON/OFF ).
Press button 7 ( F1 ) to display the operation
mode "Auto".
1
2
F1
When the room temperature is higher than the preset temperature,
cooling operation starts.
When the room temperature is lower than the preset temperature,
heating operation starts.
* The current operation mode ("Auto cool" or "Auto heat") will be displayed after the mode is determined.
If "Display/non-display of COOL/HEAT during AUTO mode" has been set to "Non-display" while making the initial settings, only "Auto" will be
displayed.
When an error occurs, the following screen will appear.
Check the error status, stop the operation, and consult your dealer.
F1 F2 F3 F4
Error information
Error code
Error unit IU
Ref. address Unt#
Model name
Serial No.
ResetPage
Error information
Contact information
Dealer
Tel
ResetPage
Reset error: Reset button
Reset error: Reset button
Error code, error unit, refrigerant address, unit model name, and serial
number will appear.
The model name and serial number will appear only if the information
have been registered.
Press button 7 ( F1 ) or 8 ( F2 ) to go to the next page.
Contact information (dealer's phone number) will appear if the
information have been registered.
blinks
Auto (Auto cooling/heating operation)
*1

Eng-9
English
Remote controller (PZ-01RC) (continued)
F1 F2 F3 F4
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
5. Timer and Weekly timer
6. Service
7. Others
Timer
Weekly timer
Maintenance password setting
The settings for Timer and Weekly timer operation can be made from
the remote controller.
Press button 4 ( MENU ) to go to the Main menu, and move the cursor
to the desired setting with button 7 ( F1 ) or 8 ( F2 ).
The following functions are NOT available.
(1) In main menu (Press button 4 (MENU), main menu appears.)
• “Vane Louver Vent (Lossnay)”
• “High power”
• “OU silent mode”
• In “Energy saving” menu, “schedule” function is NOT available.
• “Filter information”
• “Maintenance”
• In “Service” menu, “Drain pump test run”, “Check” functions are
NOT available, except for “Request code” in “Check” function.
•ON/OFF timer
Operation ON/OFF times can be set in 5-minute increments.
•Auto-Off timer
Auto-Off time can be set to a value from 30 to 240 in 10-minute
increments.
•The initial administrator password is "9999". Change the default
password as necessary to prevent unauthorized access. Have
the password available for those who need it.
•If you forget your administrator password, you can initialize the
password to default password "9999" by pressing and holding
the F1 and F2 buttons simultaneously for three seconds on the
maintenance password setting screen.
Operation ON/OFF times for a week can be set.
Up to eight operation patterns can be set for each day.
Note
• Operating intsructions for the remote controller PZ-01RC has basically
the same contents as PAR-31MAA.
Refer to the appendix in the instruction book of PAR-31MAA when
necessary.
Note;
• Please see the table below for the timer and the weekly timer
functions.
Timer &
Weekly timer PZ-01RC PZ-61DR-E M-NET system controller
System X Available - -
System Y Do not use Available -
System Z Do not use Available Available
Settable
contents
ON/OFF
Setting temp.
Mode
ON/OFF
Fan speed
Night-purge
Depends on the
type of controllers

Eng-10
Maintenance
For prolonged use, ask your dealer to perform the following inspections about once per year.
When the unit is used for several years, its inside becomes dirty and the performance impairs. This
often causes foul odors as well as water leakage from and malfunctions on the unit, and clogging
in the drain hose due to dirt and dust.
Before performing inspection and maintenance, turn the unit's main power supply OFF by the circuit breaker. (This prevents the
protective mode from being activated during inspection.)
Inspected parts Maintenance and inspection If maintenance is neglected
Inspection items Corrective action
Drain pump
Water drainage performance.
Pump inlet port for dirt or dust.
If dirt or dust is found, wipe the recess on the drain pan
surface, suction area, and pump inlet port clean. If the drain
pump is particularly dirty, replace parts. If water drainage
performance has been impaired after cleaning, replace
parts.
Defective water drainage
• Do not use solvents such as thinner, acidic, alkaline detergents or nylon scrubbing brushes. (Failure to heed this warning will degrade the
plastic.)
• If cutting oil or other oil is adhering, wash off with sufcient water. If the drain pan is particularly dirty, clean with a neutral detergent. Then
thoroughly wash off the detergent. (Remaining detergent will degrade the plastic.)
• Do not use detergent or water with 40 ºC or higher. (Failure to heed this warning may lead to deformation.)
• The drain pump is a consumable part and must be replaced.
• Replace the drain pump when stopping operation due to the shortage of pumping. (Expenses must be borne by the customer.)
• After operating the unit in cooling mode for 2,100 hours (approximately ve years), the LED on the circuit board blinks. Perform inspection and
replace the drain pump, if necessary. For details on work procedures, see the Installation Manual.
• When assembling, do not twist the hose.
Precautions When Cleaning Drain Pan and Drain Pump
Replacement of the Drain pump
How to Clean around Drain Pump
Maintenance cover
Drain pan Drain pump
Screw 1. Remove the maintenance cover.
(7 screws for GUG-01, 02SL-E, 6 screws for GUG-03SL-E)
2. Wipe off any dirt or dust adhering to the recess on the drain pan
surface, suction area, and pump inlet port or for drain blockage.
3. After wiping clean, rinse with sufcient water (approx. 1,000 cc).
Turn the unit power supply ON. Check if water is drained by
controlling the drain pump trial operation switch (set unit circuit
SW11-1 to ON).
* Do not to lose removed screws.
• Consider the indicated operation hours as a guide for the replacement.
It is based on the use of ten hours per day or 420 hours per year, which is the equivalent of two months, in the cooling mode.
Note: The above hours does not indicate the term of guarantee.
Consider for early replacements if operating the unit at the following sites:
• Locations with high temperature/humidity or the change of it is severe
• Locations where the power uctuates (such as voltage, frequency or wave form distortion) severely. Never use the unit outside the tolerance.
• Locations where oscillation or impulse is severe
• Locations with a large amount of dust or salt
• Locations where power supply starts/stops frequently, or for prolonged operation (e.g. 24 hours of air conditioning)

Eng-11
English
■ Moving the Unit
(1) When removing and re-installing the unit for extension and reconstruction or for moving to another site, contact your dealer in advance.
Specialised skills for moving the unit will be required. Construction expenses will be incurred.
(2) When the unit is lled with refrigerant during installation or when it is moved, do not use refrigerants other than designated.
(3) Handling of freon gas or abandonment of this unit, follow local regulations or standards.
■Installation Site
(1) When installing or moving the unit, contact your dealer or specialist vendor.
(2) Avoid installation at the following sites: described in CAUTION (page 2, 3)
(3) Install the unit so that it is horizontal or a drain discharge port is attached below (within 1 °). Otherwise, water may drip.
(4) When installing the unit in places such as hospitals or communications service stations, take necessary measures to shield noise generating
sources.
Relocation, installation place
Specications
Model name Running current (A) Input power (W) Dimension (mm) Weight (kg)
Width Depth Height
GUG-01SL-E
Less than 0.1 A 2.5 W (Heating / Fan)
12.4 W (Cooling)
492 812 330 21
GUG-02SL-E 492 1034 394 26
GUG-03SL-E 461 1130 404 28
* The running current and the input power are based on 230V/50Hz.
If you hear strange sounds, if no air is blown out or if some other
trouble occurs, switch off the power and contact your dealer. Consult
with your dealer concerning the cost of inspection or repair work.
Consult with your dealer about the after-sales services provided for
this product.
The parts listed below are service parts. It is necessary that the regular check and the regular replacement or the replacement when it is broken. In
addition, expenses for parts and replacement work is charged to customers.
- Drain pump
- Printed circuit board
After-sales servicing
Maintenance and lifetime
Attentive inspection
Inspect your unit of good service!
Have you
noticed?
● Fan do not run when the unit is turned on.
● Abnormal noises or vibrations while the unit is running.
● Retarded or irregular rotations.
(Motors are component which requires maintenance.)
● Burnt odor.
● Corroded or damaged installation section.
Stop
running.
Turn off the unit. Then,
contact your dealer for
prevention of failure or
hazard. The dealer should
appraise the possible cost.

Manufactured by: MITSUBISHI ELECTRIC CORPORATION
TOKYO BLDG. 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO, 100-8310 JAPAN

Prior to use, thoroughly read the instructions in this manual to use the product correctly.
Retain for future reference.
Make sure that this CD-ROM and the Installation Manual are passed on to any future users.
To ensure safety and proper operation of the remote controller, the remote controller should
only be installed by qualified personnel.
CITY MULTI Control System
and Mitsubishi Mr. Slim Air Conditioners
MA Remote Controller PAR-31MAA
Instruction Book
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Mode Temp.
Cool Set temp.
Product features
Feature 1
Large, easy-to-see display
Full-dot LCD display with large characters
for easy viewing
Feature 2
Simple button arrangement
Feature 3
Large, easy-to-press buttons
Buttons are arranged according
to usage to allow for intuitive
navigation.
Frequently used buttons are larger
than other buttons to prevent
unintended pressing of other
buttons.

Contents
Safety precautions .................................... 4
Names and functions of controller components ......... 6
Controller interface ....................................................6
Display.......................................................................8
Basic operations .......................................... 12
Power ON/OFF........................................................12
Operation mode, temperature, and fan speed settings ..........14
Maintenance ................................................. 52
Troubleshooting ............................................ 54
Specifications ................................................ 56
Filter information......................................................52
Error information......................................................54
Read before operating the controller ......... 10
Menu structure.........................................................10
Icon explanations..................................................... 11
Main menu list .........................................................18
Restrictions for the sub remote controller................19
Navigating through the Main menu..........................20
Vane•Louver•Vent. (Lossnay)..................................22
High power ..............................................................24
Clock........................................................................25
Timer (On/Off timer).................................................26
(Auto-Off timer)..............................................28
Weekly timer............................................................30
OU silent mode........................................................32
Restriction................................................................34
Energy saving..........................................................38
Night setback...........................................................42
Manual vane angle ..................................................44
Main display.............................................................46
Contrast...................................................................47
Language selection .................................................48
Function setting .......................................................50
Navigating through the menu ......................18
Controller operation-Function settings .......22

4
WARNING
• Thoroughly read the following safety precautions before using the unit.
• Observe these precautions carefully to ensure safety.
CAUTION
Indicates a risk of death or serious injury.
Indicates a risk of serious injury or structural damage.
WARNING
Safety precautions
• After reading this manual, pass it on to the end user to retain for future reference.
• Keep this manual for future reference and refer to it as necessary. This manual should be made available
to those who repair or relocate the controller. Make sure that the manual is passed on to any future
users.
General precautions
To reduce the risk of electric shock, malfunctions,
smoke or fire, do not operate the switches/buttons or
touch other electrical parts with wet hands.
To reduce the risk of shorting, current leakage,
electric shock, malfunctions, smoke, or fire, do not
wash the controller with water or any other liquid.
Do not install the unit in a place where large
amounts of oil, steam, organic solvents, or corrosive
gases, such as sulfuric gas, are present or where
acidic/alkaline solutions or sprays are used
frequently. These substances can compromise
the performance of the unit or cause certain
components of the unit to corrode, which can result
in electric shock, malfunctions, smoke, or fire.
When disinfecting the unit using alcohol, ventilate
the room adequately. The fumes of the alcohol
around the unit may cause a fire or explosion when
the unit is turned on.
To reduce the risk of injury or electric shock, before
spraying a chemical around the controller, stop the
operation and cover the controller.
To reduce the risk of injury or electric shock, stop
the operation and switch off the power supply before
cleaning, maintaining, or inspecting the controller.
If any abnormality (e.g., burning smell) is noticed,
stop the operation, turn off the power switch, and
consult your dealer. Continued use of the product
may result in electric shock, malfunctions, or fire.
Properly install all required covers to keep moisture
and dust out of the controller. Dust accumulation and
water can cause electric shock, smoke, or fire.
CAUTION
To reduce the risk of fire or explosion, do not place
flammable materials or use flammable sprays
around the controller.
To reduce the risk of damage to the controller, do not
directly spray insecticide or other flammable sprays
on the controller.
To reduce the risk of environmental pollution, consult
an authorized agency for proper disposal of remote
controller.
To reduce the risk of electric shock or malfunctions,
do not touch the touch panel, switches, or buttons
with a pointy or sharp object.

5
To reduce the risk of injury and electric shock, avoid
contact with sharp edges of certain parts.
To avoid injury from broken glass, do not apply
excessive force on the glass parts.
To reduce the risk of injury, wear protective gear
when working on the controller.
Precautions for moving or repairing the controller
WARNING CAUTION
The controller should be repaired or moved only by
qualified personnel. Do not disassemble or modify
the controller.
Improper installation or repair may cause injury,
electric shock, or fire.
To reduce the risk of shorting, electric shock, fire,
or malfunction, do not touch the circuit board with
tools or with your hands, and do not allow dust to
accumulate on the circuit board.
Additional precautions
To avoid damage to the controller, use appropriate
tools to install, inspect, or repair the controller.
To avoid discoloration, do not use benzene, thinner,
or chemical rag to clean the controller. To clean the
controller, wipe with a soft cloth soaked in water with
mild detergent, wipe off the detergent with a wet
cloth, and wipe off water with a dry cloth.
This controller is designed for exclusive use with the
Building Management System by Mitsubishi Electric.
The use of this controller for with other systems or
for other purposes may cause malfunctions. To avoid damage to the controller, provide protection
against static electricity.

6
Names and functions of controller components
Controller interface
Function buttons
5
6
1234
7890

7
Press to turn ON/OFF the indoor unit.
1ON/OFF button
This lamp lights up in green while the unit
is in operation. It blinks while the remote
controller is starting up or when there is
an error.
Press to save the setting.
Main display: Press to change the operation
mode.
Main menu: Press to move the cursor down.
Press to return to the previous screen.
Main display : Press to decrease temperature.
Main menu: Press to move the cursor up.
Press to bring up the Main menu.
Main display : Press to increase temperature.
Main menu: Press to go to the previous page.
Operation settings will appear.
When the backlight is off, pressing any
button turns the backlight on and it
will stay lit for a certain period of time
depending on the screen.
Main display : Press to change the fan speed.
Main menu: Press to go to the next page.
6ON/OFF lamp
2SELECT button
7Function button F1
3RETURN button
8Function button F2
4MENU button Page 20
9Function button F3
5Backlit LCD
0Function button F4
When the backlight is off, pressing any
button turns the backlight on and does
not perform its function. (except for the
ON/OFF button)
Fri
Room
Set temp.
Mode Temp. Fan
Cool Auto
Main
Main display:
Cursor Page
Main menu
Vane·Louver·Vent. (Lossnay)
High power
Timer
Weekly timer
OU silent mode
The functions of the function buttons
change depending on the screen.
Refer to the button function guide that
appears at the bottom of the LCD for
the functions they serve on a given
screen.
When the system is centrally
controlled, the button function guide
that corresponds to the locked button
will not appear.
Main display Main menu
Function guide
7890 7890