Mars PS-121B Instruction manual

517.787.2100 • www.marsdelivers.com
Installation, Operation
& Maintenance Manual
Heat Controller • 1900 Wellworth Ave. • Jackson, MI 49203 • [phone] • www.heatcontroller.com
INSTALLATION, OPERATION
& MAINTENANCE MANUAL
Portable Room Air Conditioner
and Heat Pump
PS-121B
PSH-141A
French version of this manual is available on our website
Thank you for purchasing our Portable Air Conditioner.
Before using your air conditioner, please read this instruction
manual carefully and keep it for future reference.
READ AND SAVE THESE INSTRUCTIONS!

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
Preparation.............................................................................................................................................2
Safety Precautions.................................................................................................................................3
Cautions..................................................................................................................................................4
Installation..............................................................................................................................................5
Operation................................................................................................................................................9
Maintenance.........................................................................................................................................14
Faults Diagnosis..................................................................................................................................15
Design and Compliance Notes...........................................................................................................16
Contents
1

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
2
Preparation
2
rear
front
control panel
handle
(both sides)
horizontal louver
blade
(swing automatically)
Caster
bottom tray
drain outlet
drain outlet
(only for pump
heating mode)
power cord outlet
power cord storage clips
power plug socket
upper air filter
(behind the grille)
upper air intake
air outlet
lower air filter
lower air intake
drain outlet

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
3
3
Safety Precautions
•Installation must be performed according to the installation instructions. Improper
installation can cause water leakage, electrical shock, or fire.
•Use only the included accessories and parts, and specified tools for the installation. Using
non-standard parts can cause water leakage, electrical shock, fire, and injury or property
damage.
•Make sure that the outlet you are using is grounded and has the appropriate voltage. The
power cord is equipped with a three-prong grounding plug to protect against shock.
Voltage information can be found on the side of the unit, behind the grille.
•Install the unit on a flat, sturdy surface. Failure to do so could result in damage or
excessive noise and vibration.
•The unit must be kept free from obstructionsto ensure proper function and to mitigate
safety hazards.
•DO NOT modify the length of the power cord or use an extension cord to power the unit.
DO NOT share a single outlet with other electrical appliances. Improper power supply
can cause fire or electrical shock.
•DO NOT install your air conditioner in a wet room such as a bathroom or laundry room.
Too much exposure to water can cause electrical components to short circuit.
•DO NOT install the unit in a location that may be exposed to combustible gas, as this
could cause fire.
•The unit has wheels to facilitate moving. Make sure not to use the wheels on thick carpet
or to roll over objects, as these could cause tipping.
•DO NOT operate a unit that has been dropped or damaged.
•Only use the included accessories and specified parts for installation. Using nonstandard
parts can cause water leakage, electrical shock, fire, and injury or property damage.
•The unit must be kept free from obstruction to ensure proper function.
•DO NOT allow children to play with the air conditioner. Children must be supervised
around the unit at all times.
•If the air conditioner is knocked over during use, turn off the unit and unplug it from the
main power supply immediately. Visually inspect the unit to ensure there is no damage. If
you suspect the unit has been damaged, contact a technician or customer service for
assistance.
•In a thunderstorm, the power must be cut off to avoid damage to the machine due to
lightning.
Please read through these instructions before you start the installation process.
Improper installation can cause damage to the unit, your personal property, and
also poses a personal safety hazard.

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
4
4
Cautions
•This appliance can be used by children aged from 8 years and above and person 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 should not play with the appliance. Cleaning and
user maintenance should not be made by children without supervision.
•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.
•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.
•Prior to cleaning or other maintenance, the appliance must be disconnected from the supply
mains.
•Do not install the appliance in a location that may be exposed to combustible gas.
•If combustible gas accumulates around the unit, it may cause fire.
•Do not run cord under carpeting. Do not cover cord with throw rugs, runners, or similar
coverings. Do not route cord under furniture or appliances. Arrange cord away from traffic
area so it will not be tripping hazard.
•Do not operate unit with a damaged cord or plug. Discard unit or return to an authorized
service facility for examination and/or repair.
•To reduce the risk of fire or electric shock, do not use this appliance with any solid-state
speed control device.
•The appliance shall be installed in accordance with national wiring regulations.
•Contact the authorized service technician for repair or maintenance of this unit.
•Contact the authorized installer for installation of this unit.
•When there are wide differences between "USER'S MANUAL" and "Remote controller
Illustration" on function description, the description on "USER' S MANUAL" shall prevail.
•Do not operate your air conditioner in a wet room such as a bathroom or laundry room.

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
5
5
Installation
Choosing The Right Location
Your installation location should meet the following
requirements:
•Make sure that you install your unit on an even
surface to minimize noise and vibration.
•The unit must be installed near a grounded
plug, and the Collection Tray Drain (found on
the back of the unit) must be accessible.
•The unit should be located at least 30cm (12”)
from the nearest wall to ensure proper air
conditioning.
•DO NOT cover the Intakes, Outlets or Remote
Signal Receptor of the unit, as this could cause
damage to the unit.
Note About Fluorinated Gases
•This air-conditioning unit is a hermetically sealed unit that contains fluorinated gases.
For specific information on the type of gas and the amount, please refer to the relevant
label on the unit itself.
•Installation, service, maintenance and repair of this unit must be performed by a
certified technician.
•Product un-installation and recycling must be performed by a certified technician.
•If the system has a leak-detection system installed, it must be checked for leaks at least
every 12 months.
•When the unit is checked for leaks, proper record-keeping of all checks is strongly
recommended.
NOTE:
All the illustrations in the manual are for explanation purpose only. Your machine may be
slightly different. The actual shape shall prevail. The unit can be controlled by the unit
control panel alone or with the remote controller. This manual does not include Remote
Controller Operations, see the <<Remote Controller Instruction>> packed with the unit for
details.

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
6
6
Installation
Tools Needed
•Medium Phillips screwdriver
•Tape measure or ruler
•Knife or scissors
•Saw (optional, to shorten window adapter for narrow windows)
Accessories
Your Window Installation Kit fits windows 67.5-123cm (26.5-48”) and can be shortened
for smaller windows.
Window Installation Kit Step One:
Preparing the Exhaust Hose
assembly
Press the exhaust hose into the window
slider adapter and unit adapter, clamp
automatically by elastic buckles of the
adapters.
Step Two: Install the Exhaust Hose
assembly to the unit
Insert unit adapter of the Exhaust hose assembly
into the lower groove of the air outlet of the unit
while the hook of the adapter is aligned with the
hole seat of the air outlet and slide down the
Exhaust hose assembly along the arrow
direction for installation.
Part Description
1 pc
1 pc
1 pc
1 pc
1 pc
1 pc
1 pc
1 pc
1 pc
2 pc
2 pc
1 set
1 set
Unit Adaptor
Window Slider Adaptor
Window Slider A
Window Slider B
Exhaust Hose
Bolt
Foam Seal A (Adhesive)
Foam Seal B (Adhesive)
Foam Seal C (Non-adhesive)
Security Bracket and 2 Screws
Drain Hose
Drain Hose Adaptor(only for
heat pump mode)
Quantity
Remote Controller and Battery
(For remote control models only)
ON/OFF
TEMP
SHORT
CUT
TIMER ON TIMER OFF
MODE
FAN
SLEEP SWING LED
Unit adaptor Window slider
adaptor
Exhaust hose Exhaust hose
assembly Hook Hole Seat
Lower groove
adaptor Make sure the adaptor is
inserted into the lower
groove of the air outlet.

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
7
7
Installation
Step Three: Preparing the Adjustable Window Slider
1. Depending on the size of your window, adjust the size
of the window slider.
2. If the length of the window requires two window sliders,
use the bolt to fasten the window sliders once they are
adjusted to the proper length.
Cut the adhesive foam seal
A and B strips to the proper
lengths, and attach them to
the window sash and frame
as shown.
Insert the window slider
assembly into the window
opening.
Insert the window slider
adaptor into the hole of
the window slider.
Cut the non-adhesive foam
seal C strip to match the
width of the window. Insert
the seal between the glass
and the window frame to
prevent air and insects from
getting into the room.
Note:
Once the Exhaust Hose assembly and Adjustable Window Slider are prepared,
choose from one of the following two installation methods.
Type 1: Hung Window Installation
Window slider A Window slider B
Bolt
Foam seal B
(Adhesive type-shorter)
Foam seal A
(Adhesive type)
Window slider A
Window slider B
(if required)
Foam seal C
(Non-adhesive type)
If desired, install the
security bracket with two
screws as shown.
2 Screws
Security Bracket

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
8
Installation
8
Cut the adhesive foam seal
A and B strips to the proper
lengths, and attach them to
the window sash and frame
as shown.
If desired, install the
security bracket with two
screws as shown.
Insert the window slider
adaptor into the hole of
the window slider.
Insert the window slider
assembly into the window
opening.
Cut the non-adhesive foam
seal C strip to match the
window height. Insert the
foam seal between the
glass and the window frame
to prevent air and insects
from getting into the room.
Type 2: Sliding Window Installation
Note:
To ensure proper function, DO NOT over-extend or bend the hose. Make sure
that there is no obstacle around the air outlet of the exhaust hose (in the range of
500mm) in order for the exhaust system to work properly. All illustrations in this
manual are for explanation purposesonly. Your air conditioner may be slightly
different. The actual shape shall prevail.
Foam seal B
(Adhesive type-shorter)
Foam seal A
(Adhesive type)
Window slider A
Window slider B
(if required)
Foam seal C
(Non-adhesive type)
2 Screws
Security
Bracket

Installation, Operation & Maintenance Manual - PS-121B / PSH-141A
9
Operation
9
Swing button
Used to initiate the Auto swing
feature. When the operation is ON,
pressing the SWING button can stop
the louver at the desired angle.
Timer button
Used to initiate the AUTO ON start
time and AUTO OFF stop time
program, in conjunction with the
+ & - buttons. The timer on/off
indicator light illuminates under the
timer on/off settings
Mode button
Selects the appropriate operating
mode. Each time you press the
button, a mode is selected in a
sequence that goes from AUTO,
COOL, DRY, FAN and HEAT
(cooling only models without). The
mode indicator light illuminates
under the different mode settings.
Sleep/Eco button
Used to initiate the SLEEP/ECO
operation.
Up (+) and Down (-) buttons
Used to adjust (increasing/decreasing)
temperature settings in 1°C/1°F increments
in a range of 17°C/62°F to 30°C/86°F or
the TIMER setting in a range of 0~24hrs.
NOTE: The control is capable of
displaying temperature in degrees
Fahrenheit or degrees Celsius. To
convert from one to the other,
press and hold the Up and Down
buttons at the same time for 3
seconds.
Fan/Ion button (Ion is optional)
Controlsthe fan speed. Press to select the
fan speed in four steps-LOW, MID, HIGH
and AUTO. The fan speed indicator light
illuminates under different fan settings.
NOTE: Press this button for 3 seconds to
initiate ION feature. The ion generator is
energized and will help to remove pollen
and impurities from the air, and trap them
in the filter. Press it for 3 seconds again to
stop the ION feature.
Power button
Power switch on/off.