Gree UMAT42HP230V1AD, UMAT18HP230V1AD, UMAT36HP230V1AD, UMAT48HP230V1AD, UMAT30HP230V1AD Owner's Manual

SLIM CONCEALED DUCT UNIT
OWNER’S MANUAL

Models:
UMAT18HP230V1AD
UMAT24HP230V1AD
UMAT30HP230V1AD
UMAT36HP230V1AD
UMAT42HP230V1AD
UMAT48HP230V1AD

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

System Schematic

. . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

System Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22

Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Troubleshooting & Diagnostic Codes . . . . . . . . . . . . . . . . . . . . . . . 24

Energy Saving Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back

Thank you for choosing a

Slim Concealed Duct

Air Conditioning & Heating System!

You can feel confident in your selection because the same pride in craftsmanship
and engineering knowledge that goes into millions of other Gree installed
products worldwide has gone into your unit.

Please read this owner’s manual carefully before operation and retain it for
future reference.

Superior Design for Superior Performance

Compact and powerful, this Gree U‐Match Slim Concealed Duct indoor unit offers the ultimate
in flexibility and discretion. It is designed to be concealed above suspended ceilings or within
open closet spaces to deliver conditioned air via ducting and suitable ceiling or wall grilles.
This arrangement provides immense flexibility, in terms of both the distribution of conditioned
air and the type of grille or diffuser that best complements any room’s styling. Your unit is easily
operated from the wall‐mounted wired Tether Controller.

Like all Gree systems, this unit provides quiet comfort and energy efficient heating and cooling.
For many residential and light commercial applications, it is the ideal solution to balance comfort,
efficiency and ease of use.

The Slim Concealed Duct unit works in conjunction with the U‐Match outdoor compressor
section, featuring Gree’s exclusive G‐10 Inverter technology. The Inverter constantly adjusts
compressor speed to save energy, reduce outdoor noise and maintain a steady room
temperature, by eliminating the harsh starts and stops of conventional systems.

Thank you for selecting this Gree air conditioner. Before operating your unit,
please read this manual carefully and retain it for further reference.

INTRODUCTION

2

Indoor unit

Outdoor unit

3

NOMENCLATURE

UMAT 18 1 A D

Series Designation

UMAT – U-Match Series

Product Type

S - System
O - Outdoor Units
H - Indoor High Wall
D - Indoor Duct
C - Indoor Cassette
F - Indoor Floor/Ceiling

Revision Level

Style/Color Designation

Electrical Rating

230V - 208/230V 60Hz 1PH
115V - 115V 60Hz 1PH

HP

230V

Cooling Capacity

18 - 18,000 BtuH
24 - 24,000 BtuH
30 - 30,000 BtuH
36 - 36,000 BtuH
42 - 42,000 BtuH
48 - 48,000 BtuH

Model Type

AC - Cooling Only
HP - Heat Pump
HC - Heat/Cool

Example: UMAT18HP230V1AD

UMAT 18 1 A O

Series Designation

UMAT – U-Match Series

Product Type

S - System
O - Outdoor Units
H - Indoor High Wall
D - Indoor Duct
C - Indoor Cassette
F - Indoor Floor/Ceiling

Revision Level

Style/Color Designation

Electrical Rating

230V - 208/230V 60Hz 1PH
115V - 115V 60Hz 1PH

HP

230V

Cooling Capacity

18 - 18,000 BtuH
24 - 24,000 BtuH
30 - 30,000 BtuH
36 - 36,000 BtuH
42 - 42,000 BtuH
48 - 48,000 BtuH

Model Type

AC - Cooling Only
HP - Heat Pump
HC - Heat/Cool

Example: UMAT18HP230V1AO

WARNING

4

SAFETY PRECAUTIONS

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: DANGER, WARNING, and CAUTION. These
words are used with the safety-alert symbol.

DANGER identifies the most serious hazards which will result in severe personal injury
or death.

WARNING signifies hazards which could result in personal injury or death.

CAUTION is used to identify unsafe practices which may result in minor personal

injury or product and property damage.

NOTE is used to highlight suggestions which will result in enhanced installation,
reliability, or operation.

NOTE: Your actual air conditioning & heating system and related devices may differ
from the images shown in this manual.

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

5

SAFETY PRECAUTIONS

Please read the following before operation.

• Disconnect electrical power to the indoor and outdoor units before performing any

maintenance or cleaning.

• Do not attempt to repair the

Gree

system yourself. Incorrect 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.

CAUTION

6

System Schematic

Indoor Unit

System Components*

1. Indoor Power Supply

2. Electric Box

3. Communication Cable

4. Wired Tether Controller

5. Communication Cable

6. Front Panel

7. Service Cover

8. Liquid Pipe

9. Gas Pipe

10. Drain Hose

11. Outdoor Power Supply

Outdoor Unit

3

1

Air outlet

Air outlet

Air inlet

Air inlet

2

10

9

87

11

6

4

5

*

Not all items included in

equipment purchase

SYSTEM FUNCTIONS

WHISPER QUIET

Not only are the Gree systems energy efficient but they are quiet too. Slim Concealed Duct
operates with sound levels starting as low as 28 dB(A).

MULTI FAN 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 IN CONDENSATE LIFT PUMP

The indoor unit features a built-in drain pump that pumps condensate from the basepan to the
drain system.

CONDENSATE SENTRY

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.

INTELLIGENT PRE-HEATING

The U-Match system guards against the annoying cool air blown into the room in heating mode.
The system constantly monitors the discharge air temperature. It will delay the indoor fan until
the indoor coil has warmed up to prevent blowing uncomfortable cool air into the room.

TETHER CONTROLLER

The Gree wired Tether Controller mounts to the wall up to 25 feet from the unit. It provides
complete control over your unit’s operation mode, desired temperature, fan speed, airflow
direction and more.

INTELLIGENT DEFROST

The U-Match Intelligent Defrost function increases room comfort and saves energy by eliminating
unnecessary defrost cycles. In 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.

In defrost mode the wired Tether Controller display will show "H1" and the indoor fan and
outdoor fan will turn off while the system removes frost from the outdoor coil. Once the frost
has been removed, the wired Tether Controller display shows room set point and the system
will revert back to normal heating operation.

7

8

SYSTEM FUNCTIONS

POWER FAILURE MODES

Power interruptions are no problem for the U-Match 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 slim duct system will automatically return to the last
operating mode. Or, the system can be set to power up in standby mode.

TURBO MODE

Use Turbo Mode for situations when 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

Using the 24-hour clock feature, you can control each function in real time, for the most user­friendly operation.

MODE BUTTON

The unit can be set to five different operating modes: HEAT, COOL, DRY, FAN ONLY and AUTO.

NOTE:

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.

DRY MODE

Select this mode to increase moisture removal during warm humid conditions. In Dry mode
the indoor fan will run at low speed during the cooling cycle. When setpoint is reached, the
indoor fan will turn off with the compressor.

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.

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-FAN MODE

When operating in humid areas, U-Match has a Dry Coil function called X-Fan that will allow 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.