Blue Star MHW301RC User manual

Models: MHW301RC, MHW361RC
Mega Split Airconditioners
(with Cordless Remote Control
& 3 Phase Compressor)

Reprinted - August 2013
No part of this publication may be reproduced in any
manner whatsoever without permission in writing from the
Vice President, Blue Star Ltd., Room Airconditioners
Division, 9 Bazullah Road, T.Nagar, Chennai 600 017.
While due care has been taken to avoid errors or
misinterpretation, Blue Star Limited is neither liable nor
responsible for consequence of any action taken, on the
basis of this publication.
All contents are applicable as on the date of publication
and may subsequently be amended.
Published by Blue Star Limited, Room Airconditioners
Division, 9, Bazullah Road, T.Nagar, Chennai 600 017,
India.
For restricted circulation only. Not for sale.

1
USER’S MANUAL
Contents
From Our Vice President 2
Product Features 3
Know Your Airconditioner 4
Installation 5
The Cordless Remote Control
– An Overview 8
The Display Panel on the Indoor Unit 14
Manual Operation 15
Operating Your Airconditioner 16
Maintenance 23
Dos & Don’ts 24
Troubleshooting Chart 25
Warranty 26
Warranty Certificate 31
24x7 Customer Care & 35
Blue Star Service Offices
E-Waste Management Back inner cover

2
MEGA SPLIT AIRCONDITIONING SYSTEMS
From Our
Vice President
Dear Customer,
Congratulations on the purchase of your new
Blue Star Mega Split Airconditioner, just one of the
many world-class products that we manufacture
and market. This superior product has been
engineered for convenient and optimum
performance.
It has been manufactured with the best available
materials, with stringent quality control measures
undertaken during all the manufacturing processes.
It has been tested in the factory under actual
operating conditions to ensure that you get years
of satisfactory and trouble-free performance.
We are confident that time and performance will
justify the trust you have placed in this product.
This manual will help you get the best out of your
Mega Split Airconditioner. Please spare some time
to go through this manual carefully.
In the unlikely event of your running into a problem,
kindly check the Troubleshooting Chart to diagnose
the possible cause and take necessary steps.
However, do not hesitate to approach your dealer
or the nearest Blue Star office, if you require help.
The list of Blue Star service offices is provided in
this manual.
I do hope that you will enjoy using your Mega Split
Airconditioner.
With warm regards,
Mukundan Menon
Vice President
Room Airconditioners Division
Blue Star Limited

3
USER’S MANUAL
Product Features
Long Life
Great Looks
Small Footprint
Electronic Thermostat
Fuzzy Logic
3 Phase Power Saver Compressor
Programmable Timer
Sleep Mode
Time Delay
Auto Restart
Memory Backup
Oscillating Louvres
Digital Display
3-Speed Cooling

4
MEGA SPLIT AIRCONDITIONING SYSTEMS
Outdoor Unit
Know Your
Airconditioner
Blue Star Mega Split Airconditioners are available
in several models.
Know Your Model Number
You can identify the model number of your AC
based on the tonnage:
Nominal Tonnage Model
2.5 MHW301RC
3.0 MHW361RC
All split airconditioners consist of two main
components, the Indoor Unit (IDU) and the
Outdoor Unit (ODU). While the former is installed
inside the airconditioned room, the latter is kept
outside. This is because all the heat from inside
is rejected outside through the ODU. The ODU
houses the all-important part of your airconditioner
– the compressor. Blue Star ODUs are capable of
withstanding a 500 hour salt spray test. The
condenser coil uses coated ‘blue fins’ to enhance
coil efficiency and life, and to protect it from
chemicals and corrossion due to salinity.
The IDU is mounted on one of the walls of the
room to be airconditioned. The ODU can be
mounted on a wall, sunshade or skirting, outside
the room. The two units are connected through
refrigerant pipes made of copper.
Indoor Unit

5
USER’S MANUAL
Installation
Locating the indoor and outdoor units properly will
help optimise the performance of your
airconditioner. While your Blue Star/Dealer’s
Technician will be happy to guide you on the best
location for your airconditioner, here are a few
helpful hints.
Locating the Indoor Unit
1. Locate the IDU for the best cool air circulation.
Avoid obstructions in the way of the air
circulation.
2. Do not locate the unit directly opposite a door
which is opened frequently. The cold air will
go out of the room each time the door is
opened thus wasting energy.
3. All indoor units will form condensate water.
Provision must be made to drain this
condensate from within the indoor unit to the
outside or into a toilet or similar space. The
technician will make sure that a ‘U’ bend is
provided along the drain pipe to prevent
insects from coming into the room through
the drain tube.
2.
3.
1.

6
MEGA SPLIT AIRCONDITIONING SYSTEMS
Locating the Outdoor Unit
The outdoor unit houses the compressor,
condenser, condenser fan and electrical
components. The heat removed from the room is
expelled to the atmosphere through the outdoor
unit.
Once again, the Blue Star/Dealer’s Technician will
ensure optimal installation of the ODU for you.
However, the following information will be of interest
to you.
1. The Outdoor Unit can be mounted on a wall,
sunshade or skirting.
2. Ideally, the ODU should not be too far away
from the IDU; the recommended distances
are marked in the figure alongside.
3. Ensure that air can pass freely through the
unit. Please allow at least 2 metres free
space on the air outlet side, and 0.3 metres
on the air inlet side.
4. If more than one ODU is to be installed, they
must be properly separated, so that the warm
air from the outlet of one does not enter the
inlet of the other.
On Roof
On Sunshade
On Wall with
Frame
On Skirting
2. IDU above ODU
Max Height 7mtr
Max Height 10mtr
ODU & IDU
in same level
Max distance
20mtr
ODU above IDU
1.
3.
4.

7
USER’S MANUAL
5. Avoid long and complicated routing of pipes
between the IDU and ODU, as shown in the
three adjacent figures.
a. Too long
b. Too high
c. Too many bends
6. The ODU must be placed on a strong frame
or support. If mounted on a wall, please
ensure that the wall is thick enough and that
the frame is supported adequately.
7. Finally, it is most important that the ODU is
easily accessible to the service technician. It
is advisable to discuss the same with the
sales engineer before deciding upon the
location of the Unit.
If the ODU is to be located on a high ledge,
it will be a good idea to provide a ‘catwalk’ (a
platform) around the Unit and an access
door/window close to the outdoor unit location.
Electrical Outlet
After the locations of the outdoor unit and indoor
unit are finalised, you must provide a suitable
electrical outlet near the indoor unit.





Stabliser
To ODU
To IDU
MCB
5.
a.
b.
6.
7.
c.

8
MEGA SPLIT AIRCONDITIONING SYSTEMS
The Cordless
Remote Control
– an Overview
The Cordless Remote Control of your airconditioner
comes with a mounting bracket. Mount the bracket
on the wall near the indoor unit of your
airconditioner, at an accessible height. The remote
control can then be placed conveniently on the
mounted bracket.
Know Your Remote Control
Main Panel
1. LCD Screen – indicates current settings.
2. ON/OFF key.
3. Cycles mode through AUTO, COOL, DRY,
HEAT*, FAN modes.
4. Cycles the Fan Speed through AUTO
mode, and LOW, MEDIUM and HIGH
speeds.
5. Enables setting of desired temperature.
* Not applicable to Cooling Only models.

9
USER’S MANUAL
Secondary Panel
(slide cover downwards to access)
6. Adjust swing angle of louvre.
7. Sets louvre sweep on or off.
8. Sets the Clock.
9. Sets AC on ECONOMY mode.
10. Sets the Timer On time.
11. Sets the Timer Off time.
12. Sets the time for the Clock/Timer.
13. Sets the Clock/Timer.
14. Cancels Timer.
15. Locks the keypad.
16. Resets to default settings.

10
MEGA SPLIT AIRCONDITIONING SYSTEMS
Display
1. TRANSMISSION INDICATOR
Lights when remote control transmits
signals to the Indoor Unit.
2. MODE
Displays the current operation mode.
3. ON/OFF DISPLAY
4. TEMP
Displays the temperature setting.
5. CLOCK
The current time is displayed in 24 hour
format.
6. TIMER
The time set for both ON and OFF timers
is indicated in 24 hour format.
7. LOCK
Indicates keypad locked or not.
8. FAN SPEED
Displays the selected fan speed.
9. ECONOMY DISPLAY
Indicates if unit set to ECONOMY mode.

11
USER’S MANUAL
Inserting the Batteries
When you unpack your AC, you will find along with
your cordless remote control, 2 AAA size batteries.
1. Slide the lower portion on the front of the
remote further downwards.
2. You will find the battery compartment.
3. Slide out the battery cover.
4. Insert the batteries with polarities as shown.
5. Close the battery compartment.
Notes:
• If at any time your remote does not operate
properly, check if you are within operating
range (see later section on ‘Using the Remote
Control’). If you are, replace batteries with 2
fresh AAA size batteries, and try again. Alkaline
batteries are recommended for longer life.
• When replacing batteries, do not use old
batteries or mix different types.
• If you do not expect to use the remote control
for a few weeks, remove the batteries.
Otherwise, battery leakage may damage the
remote control.
• Average battery life during normal use is
approximately 6 months.
• Replace batteries when there is no receiving
beep from the indoor unit or if the transmission
indicator on the remote control fails to light.

12
MEGA SPLIT AIRCONDITIONING SYSTEMS
Setting the Clock
You may set the clock in the remote control using
the steps given below. The remote control will
always display the time regardless of whether the
airconditioner is on or off.
Initial Setting
When batteries are inserted into the remote control,
the clock panel displays “0:00” and the colon
flashes.
1. Press the Time Adjust button to set time.
Each time you press the button to the left, the
time set reduces by one minute, and vice
versa.
2. When the correct time is set, press the OK
button. The display stops flashing and the
clock starts operating.
Readjusting the CLOCK
3. If you need to adjust the clock at a later time,
press the CLOCK button. The colon in the
clock display begins to flash. To set the new
time, follow steps 1 and 2 described earlier.
The clock is accurate to within 10 seconds
per day.
Note:
Static electricity or other factors like extremely
high voltage nearby can cause the remote control
clock to initialise.

13
USER’S MANUAL
Using the Remote Control
1. Point the remote control towards the AC, and
operate within 8m of the AC and within a 30o
angle.
2. Press the ON/OFF button on the remote.
3. Your AC is switched ON, but your compressor
will switch on automatically after a delay of
about 3 minutes. (See ‘Time Delay’ on p.16).
4. Your AC comes with non-volatile memory, i.e.
memory that does NOT get erased on power
failure or when the unit is switched off, and all
settings – operation mode, set temperature,
swing mode, ECONOMY mode, fan speed,
timer settings – are stored in this memory.
Hence, on switching ON, the AC resumes
operation with whatever settings it was
previously programmed to operate on.
5. Press ON/OFF again to switch your AC off.
Notes:
1. Ensure that curtains, doors etc., do not block
the signals from the remote control to the
indoor unit.
2. Prevent any liquid from failing into the remote
control. Do not expose the remote control to
direct sunlight or heat.
3. If the infrared signal receiver on the indoor unit
is exposed to direct sunlight, the airconditioner
may not function properly. Use curtains to
prevent sunlight from falling on the receiver.
4. Keep the remote away from other electrical
and electronic appliances like TV, DVD player,
etc., to ensure reliable operation. If other
electrical appliances react to the AC’s remote
control, either move these appliances or consult
your local dealer.

14
MEGA SPLIT AIRCONDITIONING SYSTEMS
The Display Panel
on the Indoor Unit
1. Infrared signal receptor
2. Operation Indicator
This indicator flashes when power comes on
and stays illuminated when the unit is in
operation.
3. Not applicable to these models.
4. TIMER Indicator
This indicator lights up when TIMER is set
ON/OFF.
5. AUTO Indicator
This indicator lights up when the airconditioner
is in AUTO Operation.

15
USER’S MANUAL
Your AC can be operated manually without the
remote control too, in an emergency, in a limited
way. This is useful for example when the remote
is misplaced.
To Operate Manually:
1. Lift the indoor unit’s cover by applying gentle
pressure on both sides and lifting it upwards
until it locks in place with a click.
2. The Manual Control button(s) are exposed.
3.Press the AUTO button until the AUTO lamp
lights up. Your AC now operates in the AUTO
Mode with a Set Temperature of 24oC.
4.To turn off the AC, press the button again
until the AC is switched off.
5.The COOL button is to be used only by a
technician for testing. Kindly do not operate
the same.
6. Close the cover gently after use.
To revert to using the remote control, simply use
the remote control as usual.
Manual Operation
COOL
AUTO
5
3/4
2

16
MEGA SPLIT AIRCONDITIONING SYSTEMS
Your airconditioner can be conveniently operated
using the intelligent cordless Remote Control.
1. Switch on the MCB. A red lamp on the Indoor
Unit glows when you power on the unit.
Time Delay
The compressor can be damaged if the electrical
supply stops and resumes immediately. To protect
the compressor, a ‘Time Delay’ is incorporated
into the circuit. The Time Delay ensures that the
compressor switches on only after a delay of
about 3 minutes after (a) power is interrupted
momentarily, or (b) the COOL mode is selected.
For more details on the COOL Mode, see p.18.
2. Press the ON/OFF button. Your AC switches
on with parameters that were set before power
was switched off. In case of power failure too,
your AC retains previous settings in memory,
and resumes with earlier settings upon
resumption of power.
3.Select the COOL, DRY or FAN mode by
pressing the MODE key.
Operating Your
Airconditioner

17
USER’S MANUAL
4.Press the FAN button to select fan speed.
Every time this button is pressed, fan speed
cycles through the AUTO Mode to LOW,
MEDIUM and HIGH speeds. For more details
on the AUTO mode, see below.
5.The selected fan setting can be read on the
LCD display.
6.The current room temperature is displayed
here.
7. To switch off the AC, press the ON/OFF
button again.
The Auto Mode
When you switch your AC on, the fan speed is set
to AUTO by default. In the Auto mode, your
airconditioner ‘thinks’ for you. The unit
automatically, and continuously, monitors the
difference between room temperature and the set
temperature, and adjusts fan speed accordingly,
to ensure maximum comfort.

18
MEGA SPLIT AIRCONDITIONING SYSTEMS
Operating Modes
Your AC operates in one of the following modes:
AUTO, COOL, DRY, HEAT* or FAN. The Mode
button cyclically chooses between the operating
modes.
The COOL Mode
In the COOL Mode, the compressor is in operation
and your AC functions in the standard operating
mode, cooling your room to the desired Set
Temperature.
1. Press the Mode button to cyclically step
through the modes, and stop when the COOL
mode is selected.
2. COOL is displayed on the LCD panel when
you select the COOL Mode.
The DRY Mode
In the DRY Mode, your AC reduces the humidity
within the room faster.
3. Press the Mode button to cyclically step
through the modes, and stop when the DRY
mode is selected.
4. DRY is displayed on the LCD panel when you
select the DRY Mode.
* Not applicable to ‘cooling only’ models.