McQuay MQS-174018-CFC216A User manual

Indoor Unit
Outdoor Unit
MQS-174018-CFC216A MQIU-174018-HCU216A
MQS-174024-CFC216A MQIU-174024-HCU216A
MQS-174036-CFC216A MQIU-174036-HCU216A
MQS-174048-CFC216A MQIU-174048-HCU216A
MQS-174060-CFC216A MQIU-174060-HCU216A
 Thank you for choosing Air Conditioners, please read this owner’s manual carefully before operation and
retain it for future reference.
DC Inverter
Installation and Operation Manual
Floor Ceiling Type Unit

Contents
1 Safety Precautions ..................................................................................... 1
2 Outline of the Unit and Main Parts ............................................................. 2
4 Preparative for Installation ......................................................................... 9
4.1 Standard Accessory Parts.............................................................................9
4.2 Selection of the Installation Location .............................................................10
4.3 Connection Pipe Requirement ......................................................................12
4.4 Electrical Requirement ..................................................................................12
5 Installation of the Unit ................................................................................ 14
5.1 Installation of the Indoor Unit ........................................................................14
5.2 Installation of the Outdoor Unit ...................................................................... 17
5.3 Installation of the Connection Pipe ............................................................... 18
5.4 Vacuum and Gas Leakage Inspection ......................................................... 22
5.5 Installation of the Drain Pipe ........................................................................ 24
5.6 Electrical Wiring ............................................................................................ 26
6 Installation of Controllers ........................................................................... 30
7 Test Running ...............................................................................................30
7.1 Trial Operation and Testing.......................................................................... 30
7.2 Working Temperature Range ....................................................................... 32
8 Troubleshooting and Maintenance ............................................................. 33
8.1 Troubleshooting ............................................................................................33
8.2 Routine Maintenance ................................................................................... 34
3 User's manual of remote controller............................................................. 3
3.1 Buttons on remote controller ........................................................................... 3
3.2 Introduction for icons on display screen .......................................................... 3
3.3 Introduction for buttons on remote controller ................................................... 4
3.4 Function introduction for combination buttons ..................................................7
3.5 Operation guide ............................................................................................... 8
3.6 Replacement of batteries in remote controller ..................................................8

DC Inverter U-match Series Floor Ceiling Type Unit
1
1 Safety Precautions
WARNING!
This mark indicates procedures which, if improperly performed, might lead to the
death or serious injury of the user.
CAUTION!
This mark indicates procedures which, if improperly performed, might possibly
result in personal harm to the user, or damage to property.
WARNING!
(1). For operating the air conditioner pleasantly, install it as outlined in this installation manual.
(2). Connect the indoor unit and outdoor unit with the room air conditioner piping and cord available
from our standard parts. This installation manual describes the correct connections using the
installation set available from our standard parts.
(3). Installation work must be performed in accordance with national wiring standards by authorized
personnel only.
(4). If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in
contact with a flame, it produces toxic gas.
(5). Do not power on until all installation work is complete.
(6). During installation, make sure that the refrigerant pipe is attached firmly before you run the
compressor.
 Do not operate the compressor under the condition of refrigerant piping not attached properly
with 2-way or 3-way valve open.
 This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even
injury.
(7). During the pump-down operation, make sure that the compressor is turned off before you remove
the refrigerant piping.
 Do not remove the connection pipe while the compressor is in operation with 2-way or 3-way
valve open.
 This may cause abnormal pressure in the refrigerant cycle that leads to breakage and even
injury.
(8). When installing and relocating the air conditioner do not mix gases other than the specified
refrigerant (R410A) to enter the refrigerant cycle.
 If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an
abnormally high value and cause breakage, injury, etc.
(9). 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.
(10). Children should be supervised to ensure that they do not play with the appliance.
(11). If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.

DC Inverter U-match Series Floor Ceiling Type Unit
2
2 Outline of the Unit and Main Parts
Fig. 2.1
Notes:
①.The connection pipe and duct for this unit should be prepared by the user.
②.This unit is standard equipped with the rectangular duct.
Air inlet
Air outlet

3.2 Introduction for icons on display screen
Send signal
Turbo mode
Set temperature
Set time
TIMER ON / TIMER OFF
Child lock
Up & down swing
Set fan speed
X-fan mode
Light
Temp. display type
:Set temp.
:Outdoor ambient temp.
:Indoor ambient temp.
Sleep mode
Clock
Heat mode
(opotional)
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode
3.1Buttons on remote controller
1
2
3
4
5
6
7
8
9
10
11
ON/OFF button
MODE button
+/- button
FAN button
button
X-FAN button
Note: X-FAN is the same with BLOW
TURBO button
LIGHT button
SLEEP button
TIMER ON/TIMER OFF
button
CLOCK button
4
2
5
910
11
7
3
6
81
3
3 User's manual of remote controller

● When selecting auto mode, air conditioner will operate automatically according
to ex-factory setting. Set temperature can’t be adjusted and will not be displayed
as well. Press "FAN" button can adjust fan speed. Press " " button can adjust
fan blowing angle.
● After selecting cool mode, air conditioner will operate under cool mode. Cool
indicator " "on indoor unit is ON. Press "+" or "-" button to adjust set tempe-
rature. Press "FAN" button to adjust fan speed. Press " " button to adjust fan
blowing angle.
● When selecting dry mode, the air conditioner operates at low speed under dry
mode. Dry indicator " " on indoor unit is ON. Under dry mode, fan speed can’t
be adjusted. Press " " button to adjust fan blowing angle.
● When selecting fan mode, the air conditioner will only blow fan, no cooling and
no heating. All indicators are OFF. Press "FAN" button to adjust fan speed. Press
" " button to adjust fan blowing angle.
● When selecting heating mode, the air conditioner operates under heat mode.
Heat indicator " " on indoor unit is ON. Press "+" or "-" button to adjust set
temperature. Press "FAN" button to adjust fan speed. Press " " button to adjust
fan blowing angle. (Cooling only unit won’t receive heating mode signal. If setting
heat mode with remote controller, press ON/OFF button can’t start up the unit).
Note:
● For preventing cold air, after starting up heating mode, indoor unit will delay 1~5
minutes to blow air (actual delay time is depend on indoor ambient temperature).
● Set temperature range from remote controller: 16~30℃; Fan speed: auto, low
speed, medium speed, high speed.
3.3 Introduction for buttons on remote controller
Note:
● After putting through the power, the air conditioner will give out a sound.
Operation indictor " " is ON (red indicator). After that, you can operate the air
conditioner by using remote controller.
ON/OFF button
MODE button
1
2
Press this button can turn on or turn off the air conditioner. After turning on the air
conditioner, operation indicator " "on indoor unit’s display is ON (green indicator.
The colour is different for different models), and indoor unit will give out a sound.
Press this button to select your required operation mode.
AUTO COOL FANDRY HEAT
4

3.3Introduction for buttons on remote controller
FAN button
4
Pressing this button can set fan speed circularly as: auto (AUTO), low( ) ,medium
( ), high( ).
Auto
Note:
● Under AUTO speed, air conditioner will select proper fan speed automatically
according to ex-factory setting.
● Fan speed under dry mode is low speed.
5
Press this button can select up&down swing angle. Fan blow angle can be selected
circularly as below:
● When selecting " ", air conditioner is blowing fan automatically. Horizontal
louver will automatically swing up & down at maximum angle.
● When selecting " 、、、、 ", air conditioner is blowing fan at xed
position. Horizontal louver will stop at the xed position.
● When selecting " 、、 " , air conditioner is blowing fan at xed angle.
Horizontal louver will send air at the xed angle.
● Hold " "button above 2s to set your required swing angle. When reaching your
required angle, release the button.
Note:
● " 、、" may not be available. When air conditioner receives this signal, the
air conditioner will blow fan automatically.
button
no display
(horizontal louvers stops
at current position)
+/- button
3
● Press "+" or "-" button once increase or decrease set temperature 1℃.
Holding "+" or "-" button, 2s later, set temperature on remote controller will
change quickly. On releasing button after setting is nished, temperature indica-
tor on indoor unit will change accordingly. (Temperature can’t be adjusted under
auto mode)
● When setting TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to
adjust time. (Refer to CLOCK, TIMER ON, TIMER OFF buttons) When setting
TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to adjust time. (Refer
to CLOCK, TIMER ON, TIMER OFF buttons)
5

Press this button to set clock time. " " icon on remote controller will blink. Press
"+" or "-" button within 5s to set clock time. Each pressing of "+" or "-" button, clock
time will increase or decrease 1 minute. If hold "+" or "-" button, 2s later, time will
change quickly. Release this button when reaching your required time. Press
"CLOCK" button to conrm the time. " " icon stops blinking.
Note:
● Clock time adopts 24-hour mode.
● The interval between two operation can’t exceeds 5s. Otherwise, remote contro-
ller will quit setting status. Operation for TIMER ON/TIMER OFF is the same.
CLOCK button
6
3.3Introduction for buttons on remote controller
TIMER ON / TIMER OFF button
7
● TIMER ON button
"TIMER ON" button can set the time for timer on. After pressing this button, " "
icon disappears and the word "ON" on remote controller blinks. Press "+" or "-"
button to adjust TIMER ON setting. After each pressing "+" or "-" button, TIMER
ON setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
Press "TIMER ON" to conrm it. The word "ON" will stop blinking. " " icon
resumes displaying. Cancel TIMER ON: Under the condition that TIMER ON is
started up, press "TIMER ON" button to cancel it.
● TIMER OFF button
"TIMER OFF" button can set the time for timer off. After pressing this button," "
icon disappears and the word "OFF" on remote controller blinks. Press "+" or "-"
button to adjust TIMER OFF setting. After each pressing "+" or "-" button, TIMER
OFF setting will increase or decrease 1min. Hold "+" or "-" button, 2s later, the
time will change quickly until reaching your required time.
Press "TIMER OFF" word "OFF" will stop blinking. " " icon resumes displaying.
Cancel TIMER OFF. Under the condition that TIMER OFF is started up, press
"TIMER OFF" button to cancel it.
Note:
● Under on and off status, you can set TIMER OFF or TIMER ON simultaneously.
● Before setting TIMER ON or TIMER OFF, please adjust the clock time.
● After starting up TIMER ON or TIMER OFF, set the constant circulating valid.
After that, air conditioner will be turned on or turned off according to setting time.
ON/OFF button has no effect on setting. If you don’t need this function, please
use remote controller to cancel it.
6

3.3 Introduction for buttons on remote controller
X-FAN button
8
Press this button under cool and dry mode to start up x-fan function, and " " icon
on remote controller will be displayed. Press this button again to cancel x-fan
function, and " "icon will disappear.
Note:
● When x-fan function is on, if the air conditioner is turned off, indoor fan will still
operate at low speed for a while to blow the residual water inside the air duct.
● During x-fan operation, press X-FAN button to turn off x-fan function. Indoor fan
will stop operation immediately.
TURBO button
9
Under COOL or HEAT mode, press this button to turn to quick COOL or quick
HEAT mode. " " icon is displayed on remote controller. Press this button again
to exit turbo function and " " icon will disappear.
Press this button to turn off display light on indoor unit. " " icon on remote
controller disappears. Press this button again to turn on display light. " " icon is
displayed.
Under COOL, HEAT or DRY mode, press this button to start up sleep function.
" " icon is displayed on remote controller. Press this button again to cancel sleep
function and " " icon will disappear.
SLEEP button
LIGHT button
10
11
3.4 Function introduction for combination buttons
Child lock function
Press "+" and "-" simultaneously to turn on or turn off child lock function. When
child lock function is on, " " icon is displayed on remote controller. If you operate
the remote controller, the " " icon will blink three times without sending signal to
the unit.
Temperature display switchover function
Under OFF status, press "-" and "MODE" buttons simultaneously to switch temp-
erature display between ℃and ℉.
7

1. After putting through the power, press "ON/OFF" button on remote controller to
turn on the air conditioner.
2. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN,
HEAT.
3. Press "+" or "-" button to set your required temperature. (Temperature can’t be
adjusted under auto mode).
4. Press "FAN" button to set your required fan speed: auto, low, medium and high
speed.
5. Press " " button to select fan blowing angle.
3.5 Operation guide
3.6 Replacement ofbatteries in remote controller
1. Press the back side of remote controller marked
the cover of battery box along the arrow direction.
2. Replace two 7# (AAA 1.5V) dry batteries, and
make sure the position of "+" polar and "-" polar
are correct.
3. Reinstall the cover of battery box.
battery
Cover of
battery box
remove
reinstall
Note:
● During operation, point the remote control signal sender at the receiving
window on indoor unit.
●The distance between signal sender and receiving window should be no
more than 8m, and there should be no obstacles between them.
or wireless telephone; remote controller should be close to indoor unit during
operation.
● Replace new batteries of the same model when replacement is required.
● When you don’t use remote controller for a long time, please take out the
batteries.
● If the display on remote controller is fuzzy or there’s no display, please
replace batteries.
8