Gree U-Match 5 Series User manual

1
U-Match 5 SERIES UNIT SERVICE
MANUAL
(GC202011-VII)
Capacity: 3.5kW~16.0kW
Rate Frequency: 50/60Hz
Operation Range: -20℃~48℃

Foreword
Thank you for choosing Gree U-Match air conditioners. In order to correctly install and use our units, and for
the satisfactory operation effect, please read this manual carefully.
This manual specifies safe operation requirements from perspectives of product introduction, control,
troubleshooting and maintenance, as well as basic principles and implementation methods. Professional
operators must abide by relevant national (local) safety requirements and technical specifications set forth in this
manual during operations; otherwise, the air conditioning system may fail or be damaged, and personnel safety
accident may also occur.
Safety Notice
The air conditioner is charged with inflammable refrigerant R32.
Before using the air conditioner, please first read the instruction manual.
Before installing the air conditioner, please first read the instruction manual.
Before repairing the air conditioner, please first read the technical service manual.
Compared with common refrigerant, R32 is an environmental-friendly refrigerant that has no harm to the
ozone layer and weak greenhouse effect. Its GWP is 675. Because of its thermodynamic characteristics, R32
requires a smaller charging quantity to reach high energy efficiency. It is inflammable and odourless, but may
cause explosion under certain circumstances.

CONTENTS
Safety Notice on Maintenance......................................................................................................1
Safety Notice on Operation...........................................................................................................2
1. Product Introduction .................................................................................................................3
1.1 Lists of Units ......................................................................................................................................3
1.2 Electrical Parameters......................................................................................................................... 9
2. Control......................................................................................................................................10
2.1 Operation Mode............................................................................................................................... 10
2.2 Control Mode ....................................................................................................................................11
2.3 Functions......................................................................................................................................... 14
3. Troubleshooting.......................................................................................................................26
3.1 Wiring Diagrams .............................................................................................................................. 26
3.2 PCB Layout......................................................................................................................................38
3.3 Error Code.......................................................................................................................................53
3.4 Troubleshooting ............................................................................................................................... 55
3.5 Failures Not Caused by Errors......................................................................................................... 89
4. Maintenance.............................................................................................................................91
4.1 System Diagram .............................................................................................................................. 91
4.2 Connection Pipe Vacuum Pumping.................................................................................................. 91
4.3 Refrigerant Charging........................................................................................................................ 92
4.4 Maintenance of Major Components.................................................................................................. 94
4.5 Removal of Major Components...................................................................................................... 105
4.6 Explosive View and Lists of Parts................................................................................................... 152
Appendices ................................................................................................................................212
1. Resistance/Temperature Lists of Temperature Sensors ....................................................212
2. Temperature/Pressure List of Refrigerant...........................................................................219
3. Refrigerant Notice/Concentration ........................................................................................219
4. Operation Tools .....................................................................................................................220

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Safety Notice on Maintenance
PROHIBITED：
(1) Do not pierce or burn.
(2) Please note that refrigerant may be odorless.
(3) 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).
(4) Indoor unit adopts special joints that can’t be detached. The installation method is the same with the
common joints. However, because the joint can’t be detached, if it is badly connected and causes leakage,
it needs to be cut and replaced by a new one through welding.
(5) Using unsuitable parts or tools may lead to electric shock or fire hazard.
(6) If refrigerant leaks during maintenance, please ventilate the room immediately. Heavy leakage may lead to
breathing difficulty, severe injury or death.
(7) Disconnect power before disassembling the appliance for maintenance.
(8) The appliance should be maintained and cared by authorized technical personnel with necessary
qualifications.
WARNING:
(1) If the working place is more than 2m's high, please wear a safety helmet, gloves and a safety belt.
(2) Never mix any other substances except the specified refrigerant into the refrigerant circuit.
(3) When re-locating the appliance, check whether the new location is strong enough to withstand the weight
of the appliance.
(4) If there is refrigerant leak, please fix the leak before charging in the refrigerant. After refrigerant is charged,
check for refrigerant leaks. If you cannot spot the leak, stop the maintenance work. Please evacuate the
system and close the service valve to prevent refrigerant leaking into the room.
(5) Prepare suitable tools and protectors.
(6) If you need to carry out maintenance or check the electric circuit without cutting off the power, please be
careful not to touch the electrical parts.
NOTICE:
(1) If the appliance is maintained at a humid place, it should be grounded to avoid electric shock.
(2) Never repair the unit with wet hands. Operating the unit with wet hands may lead to electric shock.
(3) If the unit is not correctly grounded, please check and fix it.
(4) Before cleaning the unit, please disconnect power to prevent the inner fan from starting up and running at

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high speed; Otherwise personal injury may occur.
(5) Measure the insulation resistance after maintenance. The resistance must be 1M or higher. Bad insulation
may lead to electric shock.
(6) Welding and cutting work must be done in a well-ventilated place.
(7) Gas appliances, heaters and other fire sources should be kept away from the installation and maintenance
site.
(8) Maintenance should be done according to suggestions of the manufacturer.
(9) Maintenance should be done only after the refrigerant is completely reclaimed from the unit.
OBSERVED：
(1) After the maintenance work is done, check the drainage of indoor unit.
(2) Do not tilt the unit, otherwise, water may spill out from the unit and make the floor and furniture wet.
(3) Disassembly of the unit, handling of the refrigerant, oil and accessories should all be done according to
applicable local rules and regulations.
Safety Notice on Operation
PROHIBITED:
(1) Never try to modify the unit, otherwise, it may cause electric shock, overheat or fire hazard.
(2) If the power cord or conducting wires are scratched, please replace them.
(3) Never use connected or extended power cord or share the power socket with other appliances.
(4) Prepare a specialized power circuit for the appliance.
WARNING:
(1) If the power plug is dirty, please clean it before inserting it to the power socket. If the power plug is loose,
please tighten it up.
(2) Do not damage the power cord. A damaged or refitted power cord may lead to electric shock or fire hazard.
(3) Check frequently whether the appliance is in good condition.
NOTICE:
(1) After changing the batteries of remote controller, please discard them to avoid being swallowed by children.
(2) When the unit is working, do not remove the fan cover.
(3) Do not use organic solvents to wipe the controller operating panel.
(4) Before cleaning the unit, cut off the power supply.

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1. Product Introduction
1.1 Lists of Units
1.1.1 List of ODUs
Model Power Supply Finished Product Code Appearance
V/Ph/Hz
GUD35W/NhA-T
220-240V ~50Hz
208-230V ~60Hz
CF090W1310
GUD50W/NhA-T CF090W1210
GUD71W/NhA-T CF090W1220
GUD85W/NhA-T CF090W1230
GUD100W/NhA-T CF090W1240
GUD125W/NhA-T CF090W1260
GUD140W/NhA-T CF090W1280

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Model Power Supply Finished Product Code Appearance
V/Ph/Hz
GUD100W/NhA-X
380-415V 3N~50Hz/60Hz
CF090W1250
GUD125W/NhA-X CF090W1270
GUD140W/NhA-X CF090W1290
GUD160W/NhA-X CF090W1300
Note: 1 Ton =12000Btu/h = 3.517kW
If one outdoor unit is to be connected with multiple indoor units, the indoor units must have the same cooling
capacity and be of the same type.

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1.1.2 List of IDUs
Model
Rated Cooling/
Hating Capacity
(kW)
Power Supply Finished
Product Code Appearance
V/Ph/Hz
Cassette
Type
GUD35T/A-T 3.5/4.0
220-240V ~50Hz
208-230V ~60Hz
ET010N1640
GUD50T/A-T 5.0/5.5 ET010N1540
GUD71T/A-T 7.0/8.0 ET010N1420
GUD85T/A-T 8.5/8.8 ET010N1430
GUD100T/A-T 10.0/12.0 ET010N1440
GUD125T/A-T 12.1/13.5 ET010N1450
GUD140T/A-T 13.4/15.5 ET010N1460
GUD160T/A-T 14.5/17.0 ET010N1470

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Model
Rated Cooling/
Hating Capacity
(kW)
Power Supply Finished
Product Code Appearance
V/Ph/Hz
Duct Type
GUD35P/A-T 3.5/4.0
220-240V ~50Hz
208-230V ~60Hz
CF022N1650
GUD50P/A-T 5.0/5.5 CF022N1630
GUD71P/A-T 7.0/8.0 CF022N1670
GUD85P/A-T 8.5/8.8 CF022N1610
GUD71PH/A-T 7.0/8.0 CF022N2890
GUD85PH/A-T 8.5/8.8 CF022N2920
GUD100PH/A-T 10.0/12.0 CF022N1590
GUD125PH/A-T 12.1/13.5 CF022N1570
GUD140PH/A-T 13.4/15.5 CF022N1550
GUD160PH/A-T 16.0/17.0 CF022N1530

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Model
Rated Cooling/
Hating Capacity
(kW)
Power Supply Finished
Product Code Appearance
V/Ph/Hz
Duct Type
GUD35PS/A-T 3.5/4.0
220-240V ~50Hz
208-230V ~60Hz
CF022N1640
GUD50PS/A-T 5.0/5.5 CF022N1620
GUD71PS/A-T 7.0/8.0 CF022N1660
GUD85PS/A-T 8.5/8.8 CF022N1600
GUD71PHS/A-T 7.0/8.0 CF022N2900
GUD85PHS/A-T 8.5/8.8 CF022N2910
GUD100PHS/A-T 10.0/12.0 CF022N1580
GUD125PHS/A-T 12.1/13.5 CF022N1560
GUD140PHS/A-T 13.4/15.5 CF022N1540
GUD160PHS/A-T 16.0/17.0 CF022N1520

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Model
Rated Cooling/
Hating Capacity
(kW)
Power Supply Finished
Product Code Appearance
V/Ph/Hz
Floor
Ceiling
Type
GUD35ZD/A-T 3.5/4.0
220-240V ~50Hz
208-230V ~60Hz
ED020N1720
GUD50ZD/A-T 5.0/5.5 ED020N1730
GUD71ZD/A-T 7.0/8.0 ED020N1740
GUD85ZD/A-T 8.5/8.8 ED020N1750
GUD100ZD/A-T 10.0/12.0 ED020N1680
GUD125ZD/A-T 12.1/13.5 ED020N1690
GUD140ZD/A-T 13.4/15.5 ED020N1700
GUD160ZD/A-T 16.0/17.0 ED020N1710
Wall
Mounted
Type
GUD71G/A-T 7.0/8.0
EB010N0010
GUD100G/A-T 10.0/12.0 EB010N0020
Note: The outdoor unit is generally suitable to any one of the four types of indoor units with no need of change
(limited to cassette type, duct type, floor ceiling type and wall mounted type).

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1.2 Electrical Parameters
Model Power supply Circuit breaker
capacity
Min. sectional area of
power cord
V/Ph/Hz A mm2
GUD35W/NhA-T
220-240V ~50Hz
208-230V ~60Hz
16 1.5
GUD50W/NhA-T 16 1.5
GUD71W/NhA-T 20 2.5
GUD85W/NhA-T 25 2.5
GUD100W/NhA-T 32 4.0
GUD125W/NhA-T 32 4.0
GUD140W/NhA-T 40 6.0
GUD100W/NhA-X
380-415V 3N~50Hz/60Hz
16 1.5
GUD125W/NhA-X 16 1.5
GUD140W/NhA-X 16 1.5
GUD160W/NhA-X 16 1.5
Model Power Supply Fuse Capacity Circuit Breaker
Capacity
Min. Sectional Area of
Power Cord
V/Ph/Hz A A mm2
Indoor unit 220-240V ~50Hz
208-230V ~60Hz 3.15 6 1.0
NOTICE：
①Fuse is located on the main board.
②Install a circuit breaker at every power terminal near the units (indoor and outdoor units) with at least 3mm
contact gap. The units must be able to be plugged or unplugged.
③Circuit breaker and power cord specifications listed in the above table are determined based on the
maximum power input of the units.
④Specifications of power cords listed in the above table are applicable in a working condition where
ambient temperature is 40℃and multi-core copper cable (e.g. YJV copper cable, with insulated PE and
PVC sheath) is protected by a conduit, and is resistant to 90℃in maximum (See IEC 60364-5-52). If
working condition changes, please adjust the specifications according to national standards.
⑤Specifications of circuit breaker are based on a working condition where the working temperature is 40℃.
If working condition changes, please adjust the specifications according to national standards.
⑥Adopt 2pc of 0.75mm² power cords to be the communication cords between indoor and outdoor units.
The maximum length is 100m. Please select a proper length according to local conditions.
Communication cords must not be twisted together. To be in compliance with EN 55014, it is necessary to
use 8 meters long wire.
⑦Adopt 2pc of 0.75mm² power cords to be the communication cords between wired controller and indoor
unit. The maximum length is 30m. Please select a proper length according to local conditions.
Communication cords must not be twisted together. To be in compliance with EN 55014, it is necessary to
use 7.5 meters long wire.
⑧The wire gauge of communication cord should not be less than 0.75mm². It’s recommended to use
0.75mm² power cords as the communication cords.

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2. Control
2.1 Operation Mode
2.1.1 Cooling Mode
Power on
Cooling start
control
Indoor fan run
Satisfying open
Comp.condition
Comp. and
outdoor fan
run
Oil return IN
condition are met Defrost IN
condition are met
Oil return
operation Defrosting
operation
Temp of
indoor≤Set
temp
N
Y
NN
Y Y
N
Comp. and
outdoor fan
stop
Y
Comp. stop
for 3 min
Y
N

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2.1.2 Heating Mode
Power on
Oil return IN
condition are met Defrost IN
condition are met
Oil return
operation Defrosting
operation
Temp of
indoor≤Set
temp
Y
N
Comp.and
outdoor fan
stop
Y
Comp.stop
for 3min
Y
Y
Heating start
control
Satisfying open
Comp.condition
Comp.and
outdoor fan
run
Avoid cool
wind
indoor fan run
N
N
Y
NN
indoor fan run
for 1min
Comp.and
outdoor fan
stop
2.2 Control Mode
2.2.1 Based Control
2.2.1.1 Compressor Control
When cooling or heating mode is turned on, indoor fan will run for a while before the compressor starts.
Under different modes, the compressor can only be stopped after running for some time (special cases excluded).
This is to protect the compressor from frequent start or stop. Once the compressor is stopped, it must not be
restarted right away. Please wait for a few minutes.
2.2.1.2 EXV Control
When the unit is first started, the electronic expansion valve will reset control. During the process, the

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expansion valve will produce rattling sound. When cooling or heating mode is turned on, the valve will be open at
a certain step before the compressor starts.
2.2.1.3 Outdoor Fan Control
This series air conditioner has two types of outdoor units: one with a single fan and the other with double
fans. The outdoor fan can run at the highest level 10 and the lowest level 1. By controlling the speed of outdoor
fan, the unit can achieve cooling at low temperature and heating at high temperature. In fan mode, outdoor fan
will not work.
2.2.1.4 4-way Valve Control
After heating mode is turned on for a while, 4-way valve will be energized to change the direction of
refrigerant flow so that the system can run in heating and the indoor unit will not blow cold air. Under other modes,
the valve will not be energized.
To avoid the 4-way valve from incorrectly changing directions, when the unit stops in heating, due to a
temperature point or other protection reasons, the 4-way valve will continue to function temporarily and lose
power after a while.
There must be adequate differential pressure for the 4-way valve to change directions.
2.2.2 Special Control
2.2.2.1 Defrosting Control
ODU defrosting control in heating: Defrosting will start when the temperature sensed by outdoor tube
temperature sensor reaches a preset value. During defrosting, the 4-way valve will switch to the cooling condition,
and outdoor and indoor fans will both stop. When the temperature sensed by outdoor tube temperature sensor
reaches the preset value of defrosting stop, system will quit defrosting. The 4-way valve will switch back to the
heating condition, outdoor fan will start working first and indoor fan will resume its previous fan speed after
performing cold air prevention.
2.2.2.2 Oil Return Control
If the unit is running at low frequency for a long time, system will enable oil return control. This is to lead oil in
the pipeline back to the compressor so that the compressor will not be lack of oil. Generally, the oil return takes
about 5min. The compressor running frequency will be raised to the preset oil return frequency.
2.2.2.3 Refrigerant Recovery Control
Enabling method: Remote controller and wired controller both use the same enabling method. That is, within

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5min after power is connected, start cooling mode (turn on the unit) and set temperature at 16℃, then press “▲,
▼, ▲, ▼, ▲, ▼” (6 times of pressing) in 5s to enter the refrigerant recovery mode. If it is successfully enabled,
the indoor unit will display the corresponding code E3.
After the refrigerant recovery mode is enabled, if remote controller or wired controller sends a signal or the
refrigerant recovery mode has been enabled for 10min, system will exit from refrigerant recovery. If outdoor unit
is shut down because of malfunction, refrigerant recovery will be stopped immediately.
Please note that refrigerant recovery mode cannot be enabled under the following conditions:
1. If temperature is shielded remotely, refrigerant recovery mode cannot be enabled. You need to first unlock
the remote shield against temperature.
2. If temperature is higher than 16 degrees under energy-saving mode, refrigerant recovery mode cannot be
enabled. You need to first turn off the energy-saving mode.
2.2.2.4 Forced Operation Control
This control is used to quickly check whether the unit can operate normally after installation. Wired controller
has to be used to enable this control. For cassette type unit, you can enable the control through the light board.
Enabling method through the light board of cassette type unit: After the unit is installed and connected to
power, press TEST button on the light board to enter forced operation mode. Short-press TEST button (less than
2s), cooling mode will be activated. Long-press TEST button (more than 2s), heating mode will be activated.
Enabling method through wired controller:
Under power-on status,
Forced cooling: press the “▼” button continuously for 5s to enter the forced test mode.
Forced heating: press the “▲” button continuously for 5s to enter the forced test mode.
During test mode, press any button to quit the test mode.
Note: Forced test mode can only be enabled when the unit is first turned on and not yet receives any remote
controller signal or button control signal.
2.2.3 Protection Control
2.2.3.1 High Pressure Protection Control
System will enable high pressure protection control if the high pressure switch is detected open for
continuously a little time. Under high pressure protection, system will be shut down and display error code E1.
When high pressure protection occurs for the first time, system will restore operation if the high pressure
switch is detected to be reclosed for continuously a little time. When high pressure protection occurs for the

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second time in a certain time period, system will not restore operation. You need to manually turn off the unit and
clear the error before restarting up the unit. (If high pressure protection occurs frequently, please send for
professional personnel to repair.)
2.2.3.2 Low Pressure Protection Control
System will enable low pressure protection control if the low pressure switch is detected open for
continuously a little time. Under low pressure protection, system will be shut down and display error code E3.
When low pressure protection occurs, system will restore operation if the low pressure switch is detected to be
reclosed within a few minutes after shutdown. If low pressure protection occurs for several times in a period of
time, system will not restore operation automatically. You need to manually turn off the unit before restarting up
the unit.
2.2.3.3 High Temperature Prevention Control
Under heating mode, system will enable high temperature prevention control if the temperature sensed by
indoor tube temperature sensor reaches a certain value. When high temperature prevention control is enabled,
outdoor fan will slow down.
2.3 Functions
2.3.1 Setting of Filter Cleaning Reminder
When setting washing remind function, the timer area will display 2–bit number that means the pollution level,
then press “▲” and “▼” buttons to select, and press “SWING/ENTER” button to confirm the setting. Conversion
relation between the displayed pollution level and accumulative operating time are as the following list. After
setting, when it reaches the washing time, “CLEAN” icon will flash and remind, if you press “▲” and “▼” buttons
to adjust the level, and press “SWING/ENTER” button, then the accumulative time for filter washing remind will
not be reset; If the time after adjustment is larger than the current accumulative time, then “CLEAN” icon will stop
flashing; If the time after adjustment is less than the current accumulative time, then “CLEAN” icon will continue to
flash.
The only method for cancelling the remind function is to press “FUNCTION” button to switch to “CLEAN” icon,
and set the timer area to be “00”, and then press “SWING/ENTER” button, then the accumulative time of filter
washing remind is reset.
Pollution Level
Accumulated
Operating Time
(hour)
Pollution Level
Accumulated
Operating Time
(hour)
Pollution Level
Accumulated
Operating Time
(hour)
10 5500 20 1400 30 100

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Pollution Level
Accumulated
Operating Time
(hour)
Pollution Level
Accumulated
Operating Time
(hour)
Pollution Level
Accumulated
Operating Time
(hour)
11 6000 21 1800 31 200
12 6500 22 2200 32 300
13 7000 23 2600 33 400
14 7500 24 3000 34 500
15 8000 25 3400 35 600
16 8500 26 3800 36 700
17 9000 27 4200 37 800
18 9500 28 4600 38 900
19 10000 29 5000 39 1000
2.3.2 Low-temperature Drying Function
Under dry mode, when the setting temperature is 16℃, press “▼” button for twice, the setting temperature
becomes 12℃, then the unit enters into low-temperature dry function.
When low-temperature dry function is turned on, directly press “▲” button or switch the mode can quit the
function.
2.3.3 Child-lock Function
Without error, under ON or OFF status of unit, press “▲” and “▼” buttons simultaneously for 5 seconds can
enter into child-lock function, the liquid crystal screen will display “ ”; Press “▲” and “▼” buttons simultaneously
again for 5 seconds can quit the child-lock function.
Under child-lock status, no response for pressing any buttons. The unit will memorize the child-lock status
after power failure and re-energizing the unit.
2.3.4 Memory Function
Under power-off status, press “MODE” and “▲” button simultaneously for 5 seconds can turn on or turn off
memory function. When memory function is set, “MEMORY” displays.
If memory function has not been set, when the unit is re-energized after power failure, the unit is power-off
status. If the memory function is set in wired controller, when the wired controller is re-energized after power
failure, it will resume to the operating status before power failure.
2.3.5 Door Control Function
When door control function is selected, the wired controller will work when the room card is inserted and stop

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working when the room card is pulled out. When door control function senses the room card is not inserted.
The setting method please refer to Debugging Function (2.3.9).
Note:
①In long-distance monitoring or centralized controller, no matter the room card is inserted or not, the
ON/OFF of unit can be controlled. If long-distance monitoring or centralized controller information is
received when the room card is not inserted, the icon is cleared. When the card is reinserted, door
control function is judged to be turned on. If long-distance monitoring or centralized controller information
is received when the room card is inserted, it will keep the original status.
②The unit can not be controlled by buttons when the card is not inserted.
2.3.6 Switch between Fahrenheit and Degree Celsius
Under power-off status, press “MODE” and “▼” buttons simultaneously for 5 seconds, display board will
switch between degree Celsius and Fahrenheit.
2.3.7 Inquiry of Ambient Temperature
Under power-off or power-on status, press and hold “SWING/ENTER” button for 5 seconds to enter into
ambient temperature inquiry interface, then timer area displays the ambient temperature type 01 or 02, and
ambient temperature area displays the corresponding ambient temperature of corresponding type. In which, 01
refers to outdoor ambient temperature, 02 refers to indoor ambient temperature. Press “MODE” button can switch
between type 01 and 02. Press buttons other than “MODE” or when the unit receives remote controller signal, it
will quit the inquiry status. If there is no any operation for 20 seconds, it will quit automatically.
Note:
When the outdoor ambient temperature sensor detects the same temperature for 12 hours, it will shield the
display of outdoor ambient temperature sensor.
2.3.8 Inquiry of Historical Malfunction
Under off or on state of the unit, continuously press Function and ▼ buttons for 5s to view historical
malfunction.
In enquiry state, set temperature displaying zone displays “00”. Press ▲ and ▼ buttons to view the 5
malfunctions happened recently. The timer displaying position displays the specific error code. The 5th displayed
malfunction is the last malfunction.
2.3.9 Debugging Function
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the debugging

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menu. Press Mode button to adjust the setting items and press ▲ or ▼ button to set the actual value.
2.3.9.1 Setting ambient temperature sensor (dual ambient temperature sensors function)
Under debugging state, press Mode button to adjust to “00” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 3 selections:
(1) The ambient temperature at air return is set as indoor ambient temperature (timer zone displays 01).
(2) The temperature at wired controller is set as indoor ambient temperature (timer zone displays 02).
(3) Select the temperature sensor at air return in cooling, dry and fan mode; Select the temperature sensor at
wired controller in heating and auto mode (timer zone displays 03).
2.3.9.2 Displaying setting of freeze protection error code
Under debugging state, press Mode button to adjust to “02” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 2 selections:
(1) Displayed (LCD displays 01).
(2) Not displayed (LCD displays 02).
It is defaulted to be not displayed for export unit and be displayed for domestic unit.
2.3.9.3 Setting refrigerant lacking protection function
Under debugging state, press Mode button to adjust to “04” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 2 selections:
(1) With refrigerant lacking protection function (LCD displays 01).
(2) Without refrigerant lacking protection function (LCD displays 02).
2.3.9.4 Selecting blowing residual heating of indoor unit
Under debugging state, press Mode button to adjust to “05” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 2 selections:
(1) Mode 1 (LCD displays 00).
(2) Mode 2 (LCD displays 01).
Note: Blowing residual heating of indoor unit.
Mode 1: Unit stops when reaching temperature point and indoor fan motor does not stop in cooling mode;
After unit stops when reaching temperature point in heating mode, duct type unit and floor ceiling unit blow
residual heat for 60s and then stop indoor unit, while cassette type unit always operates in low fan speed and
blows residual heat for 60s when there is malfunction. When the duct type unit and floor ceiling unit stop after
reaching the temperature point in heating mode, the fan will blow residual heat for 60s and then the indoor fan will
stop. From the time when the fan stops after blowing residual heat, in order to prevent heat accumulation, the