Gree GUD50T/B-S User manual

Owner's Manual
Original Instructions
Air Conditioners
DC Inverter U-Match Series Cassette Type Unit
Models:
Indoor Unit Outdoor Unit
GUD50T/B-S GUD50W/NhB-S
GUD71T/B-S GUD71W/NhB-S
GUD100T/B-S GUD100W/NhB-S
GUD125T/B-S GUD125W/NhB-S

To Users
Thank you for selecting Gree’s product. Please read this instruction manual
carefully before installing and using the product, so as to master and correctly use
the product. In order to guide you to correctly install and use our product and
achieve expected operating effect, we hereby instruct as below:
(1) This appliance can be used by children aged from 8 years and above and
persons 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 shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.
(2) In order to ensure reliability of product, the product may consume some
power under stand-by status for maintaining normal communication of
system and preheating refrigerant and lubricant. If the product is not to be
used for long, cut off the power supply; please energize and preheat the unit
in advance before reusing it.
(3) Please properly select the model according to actual using environment,
otherwise it may impact the using convenience.
(4) This product has gone through strict inspection and operational test before
leaving the factory. In order to avoid damage due to improper disassembly
and inspection, which may impact the normal operation of unit, please do not
disassemble the unit by yourself. You can contact with the special
maintenance center of our company if necessary.
(5) When the product is faulted and cannot be operated, please contact with our
maintenance center as soon as possible by providing the following
information.
1) Contents of nameplate of product (model, cooling/heating capacity,
product No., ex-factory date).
2) Malfunction status (specify the situations before and after the error
occurs).
(6) All the illustrations and information in the instruction manual are only for
reference. In order to make the product better, we will continuously conduct
improvement and innovation. We have the right to make necessary revision

to the product from time to time due to the reason of sales or production, and
reserve the right to revise the contents without further notice.
(7) Indoor unit must not be installed in a laundry.
(8) 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.
(9) Gree Electric Appliances Inc. of Zhuhai assumes no responsibility for
personal injury, property loss or equipment damage caused by improper
installation and commissioning, unnecessary maintenance, or not following
relevant national rules and regulations, industrial standards and
requirements in this instruction manual.
(10) The final right to interpret for this instruction manual belongs to Gree Electric
Appliances Inc. of Zhuhai.
Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss
is caused by the following reasons:
(1) Damage the product due to improper use or misuse of the product.
(2) Alter, change, maintain or use the product with other equipment without
abiding by the instruction manual of manufacturer.
(3) After verification, the defect of product is directly caused by corrosive gas.
(4) After verification, defects are due to improper operation during transportation
of product.
(5) Operate, repair, maintain the unit without abiding by instruction manual or
related regulations.
(6) After verification, the problem or dispute is caused by the quality
specification or performance of parts and components that produced by
other manufacturers.
(7) The damage is caused by natural calamities, bad using environment or force
majeure.

Contents
1 Safety Notices (Please be sure to abide them) ............... 1
2 Product Introduction ......................................................... 5
2.1 Overall Layout........................................................................5
2.2 Product Operating Range ......................................................6
2.3 Standard Accessories.............................................................6
3 Installation.......................................................................... 7
3.1 Installation Preparation ..........................................................7
3.2 Unit Installation ....................................................................17
3.3 Electrical Installation ............................................................36
3.4 Check after Installation.........................................................46
3.5 Test Running ........................................................................47
4 Installation of Controller ................................................. 47
5 Maintenance..................................................................... 48
5.1 Failures Not Caused by Faults of the AC..............................48
5.2 Error Code ...........................................................................50
5.3 Unit Maintenance .................................................................52
5.4 Notice on Maintenance ........................................................55
5.5 After-Sales Services.............................................................61

DC Inverter U-Match Series Cassette Type Unit
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1 Safety Notices (Please be sure to abide them)
SPECIAL WARNING:
(1) Be sure to comply with national gas regulations.
(2) Do not pierce or burn.
(3) Do not use means to accelerate the defrosting process or to clean, other
than those recommended by the manufacturer.
(4) Be aware that refrigerants may not contain an odor.
(5) Appliance shall be installed, operated and stored in a room with a floor
area larger than"X" m2("X" see section 3.1.1).
(6) The appliance shall be stored in a room without continuously operating
ignition sources (for example: open flames, an operating gas appliance or
an operating electric heater).
PROHIBITED: This sign indicates that the items must be prohibited.
Improper operation may cause severe damage or death to people.
WARNING: If not abide them strictly, it may cause severe damage to the
unit or the people.
NOTICE:If not abide them strictly, it may cause slight or medium damage
to the unit or the people.
OBSERVED: This sign indicates that the items must be observed.
Improper operation may cause damage to people or property.
WARNING:
This product can’t be installed at corrosive, inflammable or explosive environment
or the place with special requirements, such as kitchen. Otherwise, it will affect the
normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for the above special places, please adopt special air conditioner
with anti-corrosive or anti-explosion function.
Please read this operating manual carefully before operating the unit.
The air conditioner is charged with inflammable refrigerant R32 (GWP:
675).
Before using the air conditioner, please read the instruction manual.

DC Inverter U-Match Series Cassette Type Unit
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Before installing the air conditioner, please read the instruction manual.
Before repairing the air conditioner, please read the instruction manual.
The figures in this manual may be different with the material objects,
please refer to the material objects for reference.
PROHIBITED!
(1) The air conditioner should be grounded to avoid electric shock. Do not connect
the ground wire to gas pipe, water pipe, lightning arrester or telephone wire.
(2) The appliance shall be stored in a well-ventilated area where the room size
corresponds to the room area as specified for operation.
(3) The appliance shall be stored in a room without continuously operating open
flames (for example an operating gas appliance) and ignition sources (for
example an operating electric heater).
(4)
According to federal/state/local laws and regulations, all packages and
transportation materials, including nails, metal or wooden parts, and plastic
packing material, must be treated in a safe way.
WARNING!
(1)
Please install according to this instruction manual. Installation must be
performed in accordance with the requirement of NEC and CEC by authorized
personnel only.
(2) Any person who is involved with working on or breaking into a refrigerant
circuit should hold a current valid certificate from an industry-accredited
assessment authority, which authorises their competence to handle
refrigerants safe
ly in accordance with an industry recognised assessment
specification.
(3)
Servicing shall only be performed as recommended by the equipment
manufacturer. Maintenance and repair requiring the assistance of other skilled
personnel shall be carried out under the supervision of the person competent
in the use of flammable refrigerants.
(4) The appliance shall be installed in accordance with national wiring regulations.
(5) The fixed wires connecting to the appliance must be configured with all-pole
disconnection device under voltage grade III according to wiring rules.
(6) Air conditioner should be stored with protective measures against mechanical
damage caused by accident.
(7) If the installation space for air conditioner pipe is too small, adopt a protective
measure to prevent the pipe from physical damage.
(8)
During installation, use the specialized accessories and components,
otherwise water leakage, electric shock or fire hazard may occur.

DC Inverter U-Match Series Cassette Type Unit
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WARNING!
(9) Please install the air conditioner in a secure place that can withstand the
weight of air conditioner. Insecure installation may cause the air conditioner
falling down and lead to injury.
(10) Be sure to adopt independent power circuit. If the power cord is damaged, it
must be repaired by the manufacturer, service agent or other professional
agents.
(11)
The air conditioner can be cleaned only after it is turned off and
power-disconnected, otherwise electric shock may occur.
(12) The air conditioner is not intended to be cleaned or maintained by children
without supervision.
(13) Do not alter the setting of pressure sensor or other protective devices. If the
protective devices are short-circuited or changed against rules, fire hazard or
even explosion may occur.
(14) Do not operate the air conditioner with wet hands. Do not wash or sprinkle
water on the air conditioner, otherwise malfunction or electric shock will occur.
(15) Do not dry the filter with naked flame or an air blower; otherwise the filter will
be out of shape.
(16) If the unit is to be installed in a small space, please adopt protective measures
to prevent the concentration of refrigerant from exceeding the allowable safety
limit; excessive refrigerant leakage may lead to explosion.
(17) When installing or re-installing the air conditioner, please keep the refrigerant
circuit away from substances other than the specified refrigerant, such as air.
Any presence of foreign substances will cause abnormal pressure change or
even explosion, resulting in injury.
(18) Only professionals are allowed to carry on daily maintenance.
(19) Before contacting any wire, make sure power is cut off.
(20) Do not let any inflammable objects near the unit.
(21) Do not use organic solvent to clean the air conditioner.
(22) If you need to replace a component, please ask a professional to repair with a
component supplied by the original manufacturer so as to ensure the unit’s
quality.
(23) Improper operation may get the unit broken, hit by electric shock or cause fire.
(24) Do not make the air conditioner wet or electric shock may be lead, ensure that
the air conditioner will not be cleaned by water rinsin
g under any
circumstance.

DC Inverter U-Match Series Cassette Type Unit
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NOTICE!
(1) Do not put a finger or other objects into the air inlet or air return grill.
(2) Please adopt safety protection measures before touching the refrigerant pipe,
otherwise your hands may be hurt.
(3) Please arrange the drain pipe according to the instruction manual.
(4) Never stop the air conditioner by directly cutting off the power.
(5) Please select the proper copper pipe according to the requirement for pipe
thickness.
(6) Indoor unit can only be installed indoors while outdoor unit can be installed
either indoors or outdoors. Never install the air conditioner in the following
places:
1) Places with oil smoke or volatile liquid: plastic parts may deteriorate and
fall off or even cause water leakage.
2) Places with corrosive gas: co
pper pipe or the welding parts may be
corroded and cause refrigerant leakage.
(7) Adopt proper measures to protect the outdoor unit from small animals because
they may damage the electric components and cause malfunction of the air
conditioner.
(8) Before clean
ing, please make sure the unit is stopped. Cut the circuit
breaker and remove the power socket, otherwise, electric shock may occur.
(9) Do not wash the air conditioner with water, otherwise fire hazard or electric
shock may occur.
(10) When cleaning the filter, please be careful of your steps. If you need to work
high above the ground, please be extremely careful.
OBSERVED!
(1) If wired control is to be used, it should be connected first before powering up
the unit, otherwise the wired control may not be able to use.
(2) When installing the indoor unit, keep it away from television, wireless waves,
and fluorescent.
(3) Only use soft dry cloth or slightly wet cloth with neutral detergent to clean the
casing of the air conditioner.
(4) Before operating the unit under low temperature, connect it to power for 8
hours. If it is stopped for a short time, for example, one night, do not cut off the
power (This is to protect the compressor).

DC Inverter U-Match Series Cassette Type Unit
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2 Product Introduction
2.1 Overall Layout
NOTICE:
The connection pipe, drain pipe, power cord, for this unit should be prepared by the
user.

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2.2 Product Operating Range
—
Cooling
Heating
Outdoor temperature DB(°C)
-15~52
-15~24
Indoor temperature DB/WB(°C)
(Maximum)
32/23 27/-
2.3 Standard Accessories
Indoor Unit Accessories
No.
Name
Appearance
Q'ty
Usage
1 Drain Hose 1 To connect with the hard
PVC drain pipe
2 Bolt with Washer 4 To fix the installation
paperboard on the unit
3 Installation
Paperboard
1 Used for ceiling drilling
4 Gasket Mounting
Board
4 Used to prevent gasket
from falling off
5
Wireless
Controller
+Battery
1+2 To control the indoor unit
6 Insulation 1 To insulate the gas pipe
7 Insulation 1 To insulate the liquid pipe
8
Removal-Proof
Screw Nut
or Ordinary Nut+
Tamperproof box
or
+
1
To prevent the removal of
the gas pipe connecting
nut (Refer to the fittings
included in delivery.)
9
Removal-Proof
Screw Nut
Or Ordinary Nut+
Tamperproof box
or
+
1
To prevent the removal of
the liquid pipe connecting
nut (Refer to the fittings
included in delivery.)
10 Heat-Shringkable
Bushing
1 Connect the front panel to
the main body