Gree ME33-42/G User manual
Owner's Manual
Original Instructions
Dry Contact & 24 Volt Adaptor
Model: ME33-42/G
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 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 responsibility for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
(2) This instruction manual is a universal manual; some functions are only
applicable to particular product. All the illustrations and information in the
instruction manual are only for reference, and control interface should be
subject to actual operation.
(3) 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.
(4) For personal injury or property loss and damage caused by improper
operation such as improper installation and debugging, unnecessary
maintenance, violation of related national laws and rules and industrial
standard, and violation of this instruction manual, etc., we will bear no
liability.
(5) The final right to interpret for this instruction manual belongs to Gree
Electric Appliances Inc. of Zhuhai.
Contents
1 Safety Notices (Please be sure to abide )..........................1
2 Notices for Use ....................................................................2
3 Functions Overview.............................................................3
4 Detail Introduction ...............................................................4
4.1 Interface Function Instruction .................................................. 4
4.2 Button Instruction .................................................................... 6
4.3 Display Instruction................................................................... 7
4.4 Function Instruction................................................................. 8
5 Product Installation ...........................................................17
5.1 Product Dimension................................................................ 17
5.2 Installation Procedure ........................................................... 18
5.3 Communication Connection .................................................. 19
6 Malfunction Display...........................................................25
Dry Contact & 24 Volt Adaptor
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1 Safety Notices (Please be sure to abide)
WARNING:If these safety notices are not abided strictly, it may cause
severe damage to the unit or the people.
NOTE: If these safety notices are not abided strictly, it may cause slight or
medium damage to the unit or the people.
This sign indicates that the items operation must be prohibited. Improper
operation may cause severe damage or death to people.
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 conditioners with anti-corrosive or anti-explosion function.
Dry Contact & 24 Volt Adaptor
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2 Notices for Use
NOTICE
！
(1) This device use 24VAC for power supply. Do not connect other power to this
device. Otherwise, it may cause fire hazard or damage to the unit.
(2) Before touching the electric components, please be sure the appliance is
disconnected to power.
(3) Never install the appliance in a damp place or allow it to be exposed to direct
sunlight.
(4) Never install the appliance near heat source or a place that may easily get
splashes of water.
(5) Please install the appliance in a place without electromagnetic interference or
dusty particles.
(6) Make sure that the communication wires are connected to the correct ports,
otherwise communication failure will occur and may damage the appliance.
(7)
Once wires are connected, use insulative tape to protect the wires from
oxidation and short circuit.
(8) Working conditions for the appliance:
①Temperature: -20~+60°C;
②Relative humidity: ≤85%;
③Install it indoors and avoid direct sunlight, rain and snow.
(9) Thermostat should be configured for use with a conventional system.
(10) Functions with “*” are optional for indoor units. If a function is not included in an
indoor unit, the adaptor can’t set the function, or setting of this function is invalid
to the indoor unit.
Dry Contact & 24 Volt Adaptor
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3 Functions Overview
Dry contact & 24 volt adaptor is applicable for Gree rooftop packaged unit,
U-Match unit. It can realize two functions:
(1) Transfer the control signal of 24VAC HVAC Thermostat (such as nest) into
the control signal of Gree rooftop packaged unit, U-Match unit to make the
third party 24VAC HVAC Thermostat can control rooftop packaged unit,
U-Match unit. The device type should be set as “24 Volt Adaptor”. As for
different type of 24VAC HVAC Thermostat，the output 24VAC signal is
different. Please set different interface type for 24 volt adaptor according to
the output signal type of your purchased 24VAC HVAC Thermostat.
NOTE!
①The signal of 24VAC HVAC Thermostat is the control command for controlling
compressor, 4-way valve, indoor fan and other loads (set “00” for P01).And
the type of 4-way valve (P02) also needs to be set. Refer to “parameter
setting” for details.
②The signal of 24VAC HVAC Thermostat is the control command for setting
cooling, heating, fan and other operation modes (set “01” for P01).
(2) The detection function of fire alarm signal and other dry contact’s signal is
used for detecting the signals, such as fire alarm and overflow protection of
external water tray, for control the shutdown of air conditioner. The device
Dry Contact & 24 Volt Adaptor
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type can be set as “24 Volt Adaptor” or “Dry Contact Adaptor”.
Please refer to the section of parameter setting for detailed setting operation.
Appearance of dry contact & 24 volt adaptor is shown as below:
Fig. 3.1 Appearance of dry contact & 24 volt adaptor
4 Detail Introduction
4.1 Interface Function Instruction
Schematic diagram of interface of main board and interface function instruction
are shown as below:
Dry Contact & 24 Volt Adaptor
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Fig.4.1 Schematic diagram of interface’s function
Table 4.1.1 Function instruction of interface of main board
No. Interface Instruction
1
I3, O3
Dry contact 3
2 I2, O2 Dry contact 2
3 I1, O1 Dry contact 1
Dry Contact & 24 Volt Adaptor
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No. Interface Instruction
4 F1, F2 Fire alarm detection
5 H1, H2 RS485 communication interface,
connecting the indoor unit
6
O/B
4-way valve for heat pumps
7 TR Supply power for adapter (24VAC)
8 R Supply power for thermostat (24VAC)
9 TC Supply power for adapter (Common)
10 C Supply power for thermostat
(Common)
11
G
Fan/ indoor fan
12 W Heating/E-heater
13 Y Cooling/compressor
14
G1
Low fan speed
15 G2 Medium fan speed
16 G3 High fan speed
4.2 Button Instruction
Function instruction for buttons are shown as below:
Table 4.2.1 Function instruction for buttons
No. Buttons name Button function
SW1 BACK Return after parameter setting
SW2 DOWN Decrease parameter setting
Table of contents
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