ACPro MZC Series User manual

Models:
AKH(12)BA-D3DNA2A/I
AKH(18)BA-D3DNA2A/I
AKH(24)BA-D3DNA1A/I
MZC Series - Multi
Zone Cassette
Owners Manual

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
System Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Wireless Remote Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14
Wired Tether Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22
Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Energy Saving Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Please read this owner’s manual carefully before operation and retain it for
future reference.
Table of Contents

• Disconnect electrical power to the indoor and outdoor units before performing any
maintenance or cleaning.
•Do not attempt to repair the system yourself. ncorrect repairs may cause electric
shock or fire. Contact a qualified service technician for all service requirements.
•Keep combustible materials away from the unit.
• Do not put hands or any objects into the air inlets or outlets. This may cause personal
injury or damage the unit.
• When cleaning, be careful not to splash water on the unit. Doing this may cause
electric shock or damage to unit.
• n the event of a failure (burning smell, etc.), immediately disconnect all electrical
power to indoor and outdoor units.
SAFETY PRECAUTIO S
Please read the following before operation.
Recognize safety information. This is the safety-alert symbol. When you see this symbol on
the unit and in instructions or manuals, be alert to the potential for personal injury. Understand
these signal words: DA GER, WAR I G, and CAUTIO . These words are used with the
safety-alert symbol.
DA GER identifies the most serious hazards which will result in severe personal injury or death.
WAR I G signifies hazards which could result in personal injury or death.
CAUTIO is used to identify unsafe practices which may result in minor personal injury or
product and property damage.
OTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.
OTE: Your actual air conditioning & heating system and related devices may differ from
the images shown in this manual.
This appliance is not intended for use by children without responsible adult supervision.
Proper care should be taken to ensure safety.
Heat pumps, air conditioners & heating equipment should be installed, started up, and
serviced only by qualified installers and service technicians. Air conditioning, heat pumps
and refrigeration systems are hazardous due to high voltage electrical components, high
refrigerant pressures, and moving parts.
WARNING
WARNING
WARNING
CAUTION
3

SYSTEM PARTS
Indoor unit
Part ame
1. Power Supply and
Communication Wires
2. Drain Pipe
3. Liquid Pipe
4. Decorative Discharge Air
Grille (sold separately)
5. Gas Pipe
6. Wired Tether Controller
7. Remote Controller
8. Service Cover
9. Power Supply and
Communication Wires
10. Front Panel
11. Outdoor Power Supply
12. Liquid Pipe
13. Gas Pipe
14. Drain Hose
Outdoor Unit
Air outlet
Air inlet
1
2
5
4
3
67
Air outlet
Air inlet
14 12 11 10
The refrigerant pipe, drain pipe and electrical wiring for this unit should be
installed by a qualified HVAC professional only.
CAUTION
98
13
4
Part umbers Description
CASGR LLE1SM Decorative Grille for 12,000 & 18,000 BTU Cassettes
CASGR LLE1LG Decorative Grille for 24,000 BTU Cassette
MC20700140 XK-19 Wired Tether Controller with touch buttons.

SYSTEM FU CTIO S
WHISPER QUIET
Not only are the systems energy efficient but they are quiet too. Ceiling Cassette operates
with sound levels starting as low as 37 dB(A).
MULTI FA SPEEDS
Whether operating in either Cooling or Heating mode, the indoor fan can be set to your choice
of three different speeds (Low, Medium or High) to achieve maximum comfort.
BUILT I CO DE SATE LIFT PUMP
The unit features a built-in drain pump that lifts condensate up to 39 inches above the drain
pan to a gravity condensate drain system. n most cases, the internal condensate lift mechanism
will avoid the need for an external condensate pump.
CO DE SATE SE TRY
The unit’s fail-safe mechanism recognizes when there is a high level in the condensate pan and
shuts off the system to prevent overflow.
I TELLIGE T PRE-HEATI G
Multi21 Systems guard against the annoying cool air blown into the room in heating mode.
The system constantly monitors the discharge air temperature. t will delay the indoor fan until
the indoor coil has warmed up to prevent blowing uncomfortable cool air into the room.
CO TROLLERS
The Ceiling Cassette unit comes with a factory supplied Wireless Remote Controller and a Wired
Tether Controller.
WIRELESS REMOTE
The multi-functional infrared hand held wireless controller is sleek, ergonomically
designed, easy to use and has a large backlit LCD display.
TETHER CO TROLLER
The wired Tether Controller mounts to the wall up to 25 feet from the unit.
t provides complete control over your unit’s operation mode, desired temperature,
fan speed, airflow direction and more.
5

SYSTEM FU CTIO S
I TELLIGE T DEFROST
The ntelligent Defrost function increases room comfort and saves energy by eliminating
unnecessary defrost cycles. n heating mode, the unit will monitor the outdoor coil for frost
buildup. Once frost buildup has been detected, the system will switch into a defrost mode to
remove the frost.
I FEEL MODE
The unit will sense room temperature at the remote controller instead of at the indoor unit.
t then adjusts airflow and temperature accordingly for the ultimate in personal comfort
control and energy savings. This function is only available with the wired Tether Controller.
SWI G LOUVER
The adjustable swing louvers can be controlled from the wireless controller. Vertical swing
louvers allows five different air discharge directions including Continuous Sweep. Maximize
comfort by adjusting the direction of airflow in the room by moving the louvers up or down.
FRESH AIR I TAKE
The
Ceiling Cassette has a ventilation air knockout that allows a 4-inch flex duct connection and
a field-supplied duct booster fan. The maximum fresh air allowed is 20% of the unit's high-speed
fan airflow rating.
POWER FAILURE MODE
Power interruptions are no problem for the Multi21 system. User selections and system parameters
are stored in non-volatile memory. These parameters are retained during a power failure. When
power is returned, the Ceiling Cassette system will automatically return to the last operating mode.
TURBO MODE
Use Turbo Mode for situations where you wish to achieve the desired room temperature in the
shortest possible time. This mode runs the unit at ultra high speeds for quickest results.
CLOCK
The wireless remote controller has a built-in clock feature. The remote will display the time of
day in a 24-hour format.
TIMER MODE
The unit can be programmed to turn ON or OFF after a specific amount of time. The time period
is adjustable between one half and 24 hours.
6

SYSTEM FU CTIO S
MODE BUTTO
The unit can be set to five different operating modes: HEAT, COOL, DRY, FAN ONLY and AUTO.
OTE: AUTO MODE has fixed setpoints of 68° F heating and 77° F cooling, which are
not adjustable. The system will automatically select heating or cooling to maintain room
temperature within this band.
SLEEP MODE
The unit will automatically adjust room temperature during your sleep time. This slight change
in temperature will not affect your comfort level due to the natural effects that sleeping has on
the body, but it will save on energy consumption and will lower electric bills.
X-FA MODE
When operating in humid areas, the X-fan or Dry Coil function allows the indoor fan to run for
a pre-determined amount of time after the unit is turned off (cooling or dry modes) to ensure
that additional moisture is removed from coil.
FAHRE HEIT °F / CELSIUS °C
The remote controller can be set to display in either °F or °C.
SELF-DIAG OSIS
With an on-board computer using real-time diagnostics, the system helps to
prolong its own life. The automatic diagnosis feature continuously scans for unacceptable
operating conditions or malfunctions. f such conditions occur, the system takes corrective action
or stops. Error codes are shown on the unit display to facilitate easy troubleshooting and repair.
PRIVACY LOCK MODE
The wireless remote controller has a Privacy Lock. The Privacy Lock averts unauthorized access
or tampering with system settings.
AGE CY LISTI GS
All systems are listed with AHR (Air conditioning, Heating, and Refrigeration nstitute) and are
ETL certified per UL Standards.
7

Remote Controller
I TRODUCTIO FOR ICO S O DISPLAY SCREE
OPERATIO OF WIRELESS REMOTE CO TROLLER
Part ame
1. ON/OFF Button
2. Down Button
3. Up Button
4. Fan Button
5. Mode Button
6. Feel Button
7. Clock Button
8. Timer On Button
9. Swing Louver Button
10. X-Fan Button
11. Timer Off Button
12. Turbo Button
13. Sleep Button
14. Light Button
1
2
4
7
10
12
3
5
6
8
9
11
14
13
Auto Mode
Cool Mode
Dry Mode
Fan Mode
Heat Mode
Clock
Sleep Mode
Feel Function
Light
Send Signal
Turbo Mode
Set Fan Speed
Operation Mode
Set Temperature
Set Time
Timer On/Off
Privacy Lock
Swing Louver
8

OPERATIO OF WIRELESS REMOTE CO TROLLER
9
REMOTE CO TROLLER OPERATIO S
The wireless remote controller is sleek, versatile and allows you to change room temperatures
and functions on your Multi21 Ceiling Cassette system from the palm of your hand. The large
LCD display and buttons make it easy-to-understand and easy-to-use.
The remote controller is set from factory to display temperatures in °F. f °C is desired, turn
the remote controller OFF with the O /OFF button and then press “MODE“ and “ ” buttons
on the remote simultaneously for 5 seconds.
O /OFF BUTTO
When the system is in OFF mode, the remote controller will
display the time and last room setpoint. When you press the
O /OFF button, this indicator will be displayed and the
unit will start in the last operating mode and room setpoint.
OTE: f the O /OFF button is pressed too soon after a
stop, the compressor will not start for 1 to 5 min. due to the
inherent protection against frequent compressor cycling.
ON Mode Display
4-DIME SIO SWI G LOUVERS
• Press the Vertical Swing Louver button to select five different
vertical (up & down) air discharge directions including Continuous
Sweep. The Swing Louver icon will be displayed. Press this
button to set swing angle, which changes in direction as below:
ndicates louver swings back and forth in
the five directions, as shown.
OFF
1023
4
5
Swing Louver Display

10
MODE BUTTO
Use the “MODE” button to select one of the available modes.
The selected mode will be displayed on the remote controller and
the appropriate light will illuminate on the front display panel.
AUTO – Unit will automatically select heating or cooling to
maintain room temperature between 68°F and 77°F.
The remote controller will display the Auto Mode icon with
no setpoint.
COOL – To cool to selected setpoint and remove moisture. Press or to adjust
set temperature. System varies compressor speed to maintain desired temperature.
HEAT – To heat to selected room setpoint. Press or to adjust set temperature.
System varies compressor speed to maintain desired room temperature.
FA O LY – To circulate air without heating or cooling. Use Fan Speed button to select
speed from low to high.
DRY – Select DRY MODE to increase moisture removal during warm humid conditions.
n this mode, fan speed cannot be adjusted.
1. f the Room Temperature is above or equal to the set temperature, the system
will be operating with high fan speed for several minutes and then it will switch
to the selected fan speed.
2. f the Room Temperature is below the set temperature, the system will be OFF
and the indoor fan will be at low speed.
: AUTO
: COOL
: DRY
:
FA O LY
: HEAT
cons Displayed
OPERATIO OF WIRELESS REMOTE CO TROLLER
Feel Mode
I FEEL MODE
Press this button to use the FEEL function, and the ( ) icon will
be displayed. The unit will sense room temperature at the remote
controller instead of at the indoor unit. t then adjusts airflow and
temperature accordingly for the ultimate in personal comfort control
and energy savings. Press the button again to exit this function.
For best performance, keep remote controller away from heat or
cold temperature sources while using this function.

11
LIGHT BUTTO
Press this button to turn off display light on indoor unit.
Press again to turn it back on.
Light Display
OPERATIO OF WIRELESS REMOTE CO TROLLER
TIMER SETTI G
Timer-O / Timer-OFF BUTTO
To set when you want the unit to turn On at the end of a selected
time period, use the button labeled “Timer-ON /Timer-OFF”on the
remote controller. Press this button to make the clock icon disappear,
replaced with the word “ON” (blinking). Press or buttons to
adjust timer setting 1 minute at a time. Press and hold or
button to set timer more quickly. Press“Timer-ON /Timer-OFF”
button again to confirm setting, and the word “ON” will stop
blinking. To cancel, press“Timer-ON /Timer-OFF” button again.
To set when you want the unit to turn Off at the end of a selected time period, use the
same button. Press this button to make the clock icon disappear, replaced with the word
“OFF” (blinking). Adjust settings the same as with
“Timer-ON /Timer-OFF” settings.
OTE: Under Timer On and Off status, you can set“Timer-ON /Timer-OFF”simultaneously.
Before setting timer, be sure to set clock to correct time.
TURBO MODE
The desired room setpoint can be achieved faster in TURBO
mode. After selecting the“HEAT”or“COOL” mode button,
push the“TURBO”button. The TURBO icon will be
displayed on the remote controller and the unit will run at an
ultra-high speed. To deactivate the feature, push the“TURBO”
button again. The unit will return to normal operation.
Timer Setting ON/OFF
Turbo Mode Display

FA BUTTO
Press the FAN button to adjust the indoor fan speed:
Low ( ), Medium ( ), High ( ), Turbo and Auto.
OTE: Turbo function is not available in Dry and Auto Modes.
The Multi21 Ceiling Cassette unit will select proper fan speed
automatically according to ambient temperature.
12
OPERATIO OF WIRELESS REMOTE CO TROLLER
CLOCK SETTI G
Press this button to set clock time.“ ” icon on remote controller
will blink. Within 5 seconds, press or button to set clock time.
With each pressing of or buttons, clock time will increase
or decrease 1 minute. To quickly adjust time setting, press and
hold or button for 2 seconds. Release button when you
have reached the desired time setting. Press “CLOCK” button to
confirm the time, and “ ” icon will stop blinking.
OTE: Clock time adopts 24-hour mode. A 12-hour time
format is not available.
• Turbo function is not available in Dry and Auto mode.
• The fan operates at low speed in Dry and Auto modes, and the
speed cannot be adjusted.
• When Auto is selected, the unit will select the proper fan speed
automatically, according to the ambient temperature.
Fan Display
Clock Setting Display
PRIVACY LOCK
The Privacy Lock prevents unauthorized access to the unit controls
and prevents tampering with system settings. The remote controller
can be locked by pushing the""and " " buttons simultaneously
for 5 seconds. The Privacy Lock icon will be displayed on the remote
controller. Repeat the process to unlock the remote controller.
U
Privacy Lock Display

OPERATIO OF WIRELESS REMOTE CO TROLLER
SLEEP MODE
The Multi21 Ceiling Cassette system will automatically adjust room
temperature during your sleep time. This slight change in temperature
will not affect your comfort level due to the natural effects that
sleeping has on the body, but it will save on energy consumption
and will lower your electric bill. Press the SLEEP button to
select Sleep mode or Cancel. The SLEEP icon will appear.
TRADITIO AL MODE - SLEEP
n Traditional Mode the unit will slowly relax the room set temperature by up to 4° F until
Sleep Mode is cancelled.
In Cool or Dry modes:
The unit will run at current room setpoint for 1 hour. After 1 hour, the setpoint will increase by
2°F (1℃). After 2 hours, the setpoint will increase by 4°F (2℃) and maintain this setpoint until
Sleep Mode is cancelled.
In Heat mode:
The unit will run at current room setpoint for 1 hour. After 1 hour, the setpoint will decrease by
2° F (1℃). After 2 hours, the setpoint will decrease by 4°F (2℃) and maintain this setpoint until
Sleep Mode is cancelled.
Sleep Mode Display
13

14
OPERATIO OF WIRELESS REMOTE CO TROLLER
CHA GI G BATTERIES A D ADDITIO AL OTES
To change batteries, slide cover off battery compartment on back of remote controller. Remove
and safely discard old batteries. nsert two new AAA 1.5V dry batteries, using correct polarity.
Reattach back cover.
OTE:
• f the remote controller will not be used for a long time, remove batteries to prevent
leakage damage.
• Be sure to aim the remote controller at the receiver of the main unit when operating.
• When remote emits a signal, icon will flicker; a tone will be heard when unit receives
that signal.
Remove
old batteries Install
new batteries
CHA GI G BATTERIES

15
OPERATION OF WIRED TETHER CONTROLLER
ON/OFF BUTTON
Press On/Off to turn On the unit. Press again to turn it Off.
ODE SETTING
When the unit is ON, press Mode button to select an operating mode. It will change
sequentially as shown below: Auto–Cool–Dry–Fan– eat
“Off” State “On” State
Auto Cool Dry Fan Heat
F
F
F
TE PERATURE SETTING
Press ▲or ▼to increase/decrease the setpoint temperature as shown below. In Cool, Dry,
Fan or eat mode, the setpoint temperature range is 61°F - 86 °F. In Auto mode, the setpoint
temperature is not adjustable.
F

OPERATION OF WIRED TETHER CONTROLLER
FAN SETTING
When the unit is ON, press Fan button to select the fan speed of the indoor unit. It will change
sequentially as shown below.
16
Auto Low Medium High
F
TURBO ODE
Turbo mode will force the unit up to maximum capacity to heat or cool the room in the shortest
amount of time. Turbo Mode can only be used on eat or Cool modes.
Turbo Setting
Press Function button until the Turbo icon is displayed. Then press Enter/Cancel to confirm. To
cancel, press the Function button to re-enter the Turbo setting status, then press Enter/Cancel.
F
F
F
Turn On the unit and select eat or Cool mode. Press Enter/Cancel to start Turbo mode.
To cancel, press Function button to re-enter
the Turbo settings, then press Enter/Cancel button.
Press Function until Turbo mode Icon is displayed.
Cancel Turbo ode
F

17
OPERATION OF WIRED TETHER CONTROLLER
TI ER SETTING
The Slim Duct system has two timer modes. The Timer-On mode will turn the unit ON after
the preset time period. The Timer-Off Mode will turn the unit OFF after the preset time period.
The preset time period can be from 0.5 to 24 hours in 0.5 hour increments.
Timer-On Setting
Turn the unit Off, press the Timer button. The OFF icon will flash and the hours will be displayed .
Set the time period for the unit to remain OFF before turning ON by pressing the ▲or ▼
buttons. Press Timer button to confirm and start Timer-On mode.
FF
F
FF
Turn Off the unit. Press Timer button to select Timer On mode.
Press ▲or▼to select time period.
Timer modes can be cancelled anytime
by pressing the Timer button.
Cancel Timer
F
Press Enter/Cancel to start timer mode.

18
OPERATION OF WIRED TETHER CONTROLLER
Timer-Off Setting
Turn the unit On, press the Timer button. The ON icon will flash and the hours will be displayed.
Set the time period for the unit to remain ON before turning OFF by pressing the ▲or ▼
buttons. Press Timer button to confirm and start Timer-Off mode.
FF
F
FF
Turn On the unit and select eat
or Cool mode.
Press Timer button to select Timer Off mode.
Press ▲or▼to select time period.
Timer modes can be cancelled anytime
by pressing the Timer button.
Cancel Timer
F
Press Enter/Cancel to start timer mode.

SLEEP ODE
The unit will automatically adjust room temperature during your sleep time. This slight change
in temperature will not affect your comfort level due to the natural effects that sleeping has
on the body, but it will save on energy consumption and will lower your electric bill. Press the
SLEEP button to select Sleep Mode. The SLEEP icon will appear.
In Cool or Dry modes:
The unit will run at current room setpoint for 1 hour. After 1 hour, the setpoint will increase
by 2 °F. After 2 hours, the setpoint will increase by 4 °F and maintain this setpoint until Sleep
Mode is canceled.
In Heat mode:
The unit will run at current room setpoint for 1 hour. After 1 hour, the setpoint will decrease
by 2 °F. After 2 hours, the setpoint will decrease by 4 °F and maintain this setpoint until Sleep
Mode is canceled.
19
OPERATION OF WIRED TETHER CONTROLLER
Sleep Setting
Turn the unit On and select a mode (ex. eat, Cool, or Dry). Press the Function button until
the Sleep icon appears on the display. Press the Enter/Cancel button to start Sleep Mode.
F
FF
F
Turn On the unit and select a mode. Press Function until the Sleep icon is displayed. Press Enter/Cancel to start Sleep Mode.
Cancel Sleep ode
Press Function until the Sleep icon appears.
Press the Enter/Cancel button to cancel Sleep Mode.

FFF
20
OPERATION OF WIRED TETHER CONTROLLER
X-FAN ODE
The X-Fan function may only be selected in Cool and Dry modes. After the unit is turned Off,
the X-Fan function will keep the indoor fan running for a predetermined amount of time to dry
the indoor evaporator coil to help avoid mold and mildew growth.
X-Fan Settings
Turn the unit On and select Cool or Dry mode. Press Function button until X-fan icon is
displayed and then press Enter/Cancel to activate this function.
F
Turn On the unit, select Cooling
or Dry mode.
Press Function until the X-fan icon is displayed. Press Enter/Cancel to start X-fan
mode.
Cancel X-Fan ode
To cancel, press Function button to re-enter the
X-Fan settings, then press Enter/Cancel button.
CELSIUS OR FAHRENHEIT TE PERATURE DISPLAY
The wired Tether Controller is set from the factory to display
temperature in Fahrenheit (ºF). If Celsius (ºC) is desired, turn
the unit OFF, press Mode and ▼buttons at the same time
for 5 seconds to alternate between temperature displays.
F
To change temperature display.