Gree FGR25Pd/DNa-X User manual

PContents
PRODUCT.........................................................................................................................1
1 Product List...........................................................................................................................2
2 Nomenclature........................................................................................................................2
3 Specifications.......................................................................................................................3
CONTROL.........................................................................................................................5
1 Wired Controller....................................................................................................................6
2 Remote Controller YAP1F...................................................................................................9
3 Introduction to IDU Functions..........................................................................................10
4 Monitoring Software...........................................................................................................20
INSTALLATION..............................................................................................................63
1 Engineering Installation Preparation and Notice..........................................................64
2 Installation Materials Selection........................................................................................65
3 Installation of Indoor Unit..................................................................................................67
4 Installation of outdoor unit...............................................................................................71
5 Installation of drain pipe....................................................................................................73
6 Electrical Installation.........................................................................................................76
DEBUGGING & MAINTENANCE..................................................................................78
1 Debugging of Unit..............................................................................................................79
2 Malfunction List..................................................................................................................83
3 Troubleshooting..................................................................................................................85
4 After-sales Emergency Masures....................................................................................104
5 Wiring Diagram.................................................................................................................105
6 Disassembly And Assembly Procedure Of Main Parts..............................................107
7 Exploded Views And Part List........................................................................................109

Duct type split Air conditioner Inverter Series
1
PRODUCT

Duct type split Air conditioner Inverter Series
2
1 Product List
Model
Cooling
Capacity
Heating
Capacity Power
Supply Refrigerant
Appearance
kW kW Outdoor Indoor
FGR20Pd/DNa-X 20 22
3N/380-41
5V/50Hz/
60Hz
R410a
FGR25Pd/DNa-X 25 27.5
FGR30Pd/DNa-X 30 33
FGR40Pd/D(2)Na-X 40 43
2 Nomenclature

Duct type split Air conditioner Inverter Series
3
NO. Description Options
1 Ducted Type Air Conditioner -
2 Unit type
Cooling only type-omitted
Heat pump
Auxiliary hot water plate and pipe type-W
3 Cooling capacity Nominal cooling capacity (kW)
4 Frequency conversion system
Fixed frequency-omitted
Frequency conversion-Pd
5 Design No. Arranged based on A, B, C, D,and so on
6 Refrigerant
R22-omitted
R407-N
R410a-Na
Others to be applied for when they are used
7 Power type
380-415V 3Ph～,50/60Hz-X
(The unit to be exported must be expressed)
8 Indoor and outdoor unit code
Outdoor unit-(O)
Indoor unit-(I)
The entire unit is not expressed.
3 Specifications
Model Heat pump FGR20Pd/DNa-X FGR25Pd/DNa-X
Capacity Cooling kW 20 25
Heating kW 22 27.5
EER/COP W/W 2.55/3.25 2.65/3.10
Power supply Ph/V/Hz 3N/380-415/(50/60) 3N/380-415/(50/60)
Power input Cooling kW 7.8 9.4
Heating kW 6.8 8.9
Current input Cooling A 16.5 18.9
Heating A 14.4 17.2
Refrigerant charge volume kg 6.4 8.0
Indoor unit
Airflow volume CFM 2178 2472
m3/h 3700 4200
ESP Rated Pa 120 120
Range Pa 0-250 0-250
Sound pressure level dB(A) 52 53
Dimension
(W×D×H)
Outline mm 1460×790×365 1690×870×440
Package mm 1575×880×385 1785×985×450
Net Weight/Gross weight kg 82/104 99/134
Outdoor unit
Sound pressure level dB(A) 62 63
Dimension
(W×D×H)
Outline mm 940×320×1430 940×460×1615
Package mm 1020×420×1460 1020×560×1645
Net Weight/Gross weight kg 120/130 146/162
Connection
pipe
Outer
diameter
Liquid Inch(mm) Φ3/8 Φ3/8
Gas Inch(mm) Φ3/4 Φ7/8
Max. distance Height mm 30 30
Length mm 50 50
Loading
quantity 20'GP/40'GP/40'HQ set 12/24/24 10/20/22

Duct type split Air conditioner Inverter Series
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Model Heat pump FGR30Pd/DNa-X FGR40Pd/D(2)Na-X
Capacity Cooling kW 30 40
Heating kW 33 43
EER/COP W/W 2.65/3.20 2.60/3.10
Power supply Ph/V/Hz 3N/380-415/(50/60) 3N/380-415/(50/60)
Power input Cooling kW 11.3 15.4
Heating kW 10.3 13.9
Current input Cooling A 22.7 27.8
Heating A 20.7 26.4
Refrigerant charge volume kg 9.5 6.4×2
Indoor unit
Airflow volume CFM 3060 4120
m3/h 5200 7000
ESP Rated Pa 120 120
Range Pa 0-250 0-250
Sound pressure level dB(A) 55 56
Dimension
(W×D×H)
Outline mm 1690×870×440 1680X900X650
Package mm 1785×985×450 1800X1020X670
Net Weight/Gross weight kg 105/145 165/210
Outdoor unit
Sound pressure level dB(A) 65 66
Dimension
(W×D×H)
Outline mm 940×460×1615 940×320×1430
Package mm 1020×560×1645 1020×420×1460
Net Weight/Gross weight kg 175/190 (120/130) X2
Connection
pipe
Outer
diameter
Liquid Inch(mm) Φ1/2 Φ3/8
Gas Inch(mm) Φ1 Φ3/4
Max.
distance
Height mm 30 30
Length mm 50 50
Loading
quantity 20'GP/40'GP/40'HQ set 10/20/22 7/18/18
Note:
◆Specifications may be changed due to product improvement. Please refer to nameplates of the units.
◆Noise data are collected from a semi-anechoic room. Decibels may be slightly higher in actual operation due to
environmental change.
◆Above parameters are tested under the condition:high fan speed
◆Cooling : Indoor air temperature 27°C DB/19°C WB, Outdoor air temperature 35°C DB/24°C WB;
◆Heating : Indoor air temperature 20°C DB/15°C WB, Outdoor air temperature 7°C DB/6°C WB.

Duct type split Air conditioner Inverter Series
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CONTROL

Duct type split Air conditioner Inverter Series
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1 Wired Controller
1.1 Control panel
Fig1.1 Appearance of wired controller
Fig1.2 LED graphics of wired controller
Table 1.1 LED display instruction
No. Symbols Instructions
1 Up and down swing function
2 * Left and right swing function
3
It's valid under Save mode and displays during setting process.
Temperature lower limit for Cooling: Limit the minimum temperature value
under Cooling or Dry mode.
Temperature upper limit for Heating: Limit the maximum temperature value
under Heating, Space Heating or 3D Heating
mode.
4 *
Auto mode (Under Auto mode, the indoor units will automatically select their
operating mode as per the temperature
change so as to make the ambient comfortable.)
5
It shows the setting temperature value(In case the wired controller is controlling
a Fresh Air Indoor Unit, then the
temperature zone will display FAP)
6 Cooling mode
7 Dry mode
8 Fan mode

Duct type split Air conditioner Inverter Series
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No. Symbols Instructions
9 Heating mode
10 When inquiring or setting project number of indoor unit, it displays "NO." icon
11 * Floor Heating mode (When Heating and Floor Heating simultaneously shows
up, it indicates 3D Heating is activated.)
12 Display "SET" icon under parameter setting interface
13 -* Space Heating mode
14 Display "CHECK" icon under parameter view interface
15 Outdoor unit operates under Save mode/upper limit of system capacitor less
100%/remote Save status
16 Sleep status
17
Current set fan speed (including auto, low speed, medium-low speed, medium
speed, medium-high speed, high speed
and turbo seven status)
18 * Air status, Indoor unit optional function
19 Remind to clean the filter
20 Quiet status (including Quiet and Auto Quiet two status)
21 * Allow auxiliary electric heating On icon
22 Light On/Off function
23 X-fan function
24 * Health function, Indoor unit optional function
25 * Reserved function
26 Out function
27 Outdoor unit defrosting status
28 Gate-control function
29 Shielding status
30 Child Lock status
31 One wired controller controls multiple indoor units
32 Save status of indoor unit
33 It indicates the current wired controller is the slave wired controller (address of
wired controller is 02)
34 Memory status (The indoor unit resumes the original setting state after power
failure and then power recovery)
35 Invalid operation
36 Current wired controller connects master indoor unit
37 Timer zone:Display system clock and timer status
Note: When wired controller is connected with different indoor units, some functions will be different
1.2 Installation and removal
1.2.1 Installation dimensions

Duct type split Air conditioner Inverter Series
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Fig1.3 Installation dimensions
1.2.2 Installation method
Fig1.4 Installation of Wired Controller
Above is a simple installation method of wired controller. Please pay attention to the following:
◆Before installation, disconnect power of the indoor unit. Do not operate when power is connected.
◆Pull out the 2-core twisted pair cable from the installation hole on the wall and lead it through the hole
on the back plate of wired controller.
◆Place the wired controller on wall and secure its back plate on wall with screw M4X25.
◆Connect the 2-core twisted pair cable to terminal H1 and terminal H2. Tighten up the screws.
◆Stick the cable in the slot that is left of the terminals and buckle the wired controller’s panel with its
back plate.
Note:
If caliber of the communication cord is too large, which causes difficulty in leading or sticking the cord
according to above point 2 and point 5, strip some of the sheath of the communication cable to meet the
installation requirement.
1.2.3 Removal method

Duct type split Air conditioner Inverter Series
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Fig1.5 Removal of Wired Controller
1.2.4 Connection of communication cord
Fig1.6 One wired controller controls one indoor unit
2 Remote Controller YAP1F

Duct type split Air conditioner Inverter Series
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Button name and function introduction
No. Button name Function
1 ON/OFF Turn on or turn off the unit
2 TURBO Set turbo function
3 MODE Set operation mode
4 Set up&down swing status
5 I FEEL Set I FEEL function
6 TEMP Switch temperature displaying type on the unit’s display
7 Set health function and air function
8 LIGHT Set light function
9 X-FAN Set X-FAN function
10 SLEEP Set sleep function
11 CLOCK Set clock of the system
12 TOFF Set timer off function
13 TON Set timer on function
14 Set left&right swing status
15 FAN Set fan speed
3 Introduction to IDU Functions
Indoor unit functions cover user operation functions and engineering application functions. For user
operation functions, refer to wired controller and remote controller.
Engineering application functions include:
SN Function Name
1 User parameter query

Duct type split Air conditioner Inverter Series
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2 User parameter settings
3 Engineering parameter query
4 Engineering parameter settings
Engineering application functions can be operated through the IDU wired controller(XK46).
3.1 User Parameter Query
User parameters can be queried in power-on or power-off status.
(1) Press and hold the “FUNCTION” button for five seconds to enter the user parameter query interface.
The temperature area displays “C00” and “View” is on.
(2) Select a parameter code by pressing “ ” or “ ”.
(3) Press the “ENTER/CANCEL” button to return to the upper-level menu till quitting parameter query.
The user parameter query list is as follows:
Parameter
Code Parameter Name Parameter Range View Method
C00 Parameter
setting ingress -
Display mode:
Timer area: displays the project number of the
current IDU.
Note: If the current HBS network consists of multiple
IDUs, only the IDU that has the minimum project
number is displayed.
C06 Preferential
operation query
00: common
operation
01:
preferential
operation
Operation method:
In “C06” status, press the “MODE” button to enter the
preferential operation query interface. Press “ ” or “ ” to
switch the IDU SN.
Display mode:
Temperature area: displays the project number of the
current IDU.
Timer area: displays the preferential operation setting
value of the current IDU.
C07
Indoor
environment
temperature
query
-9 to 99
Operation method:
In “C07” status, press the “MODE” button to enter the
indoor environment temperature query interface. Press "
" or " " to switch the IDU SN.
Display mode:
Temperature area: displays the project number of the
current IDU.
Timer area: displays the temperature value of the indoor
environment temperature sensor after replenishment.
C08
Prompt time
query for air filter
cleaning
4-416: days Timer area: displays the prompt time for air filter cleaning.
C09 Wired controller
adress query 01, 02 Timer area: displays the adress of the current wired controller.
C12
Outdoor
environment
temperature
query
-9 to 99 Timer area: displays the temperature value of the
environment temperature sensor of the master ODU.
C17 Indoor relative
humidity query 20-90
Operation method:
In “C17” status, press the “MODE” button to enter the
indoor relative humidity query interface. Press “▲” or “▼”
to switch the IDU SN.
Display mode:
Temperature area: displays the relative humidity value.
Timer area: displays the project number of IDU (project
numberes are arranged from small to large).
If the HBS network consists of only one IDU, the timer
area directly displays the IDU relative humidity value in
the “C17” interface.

Duct type split Air conditioner Inverter Series
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Note:
In parameter query status, "FAN", “TIMER”, "SLEEP", and "SWING" are invalid. By pressing the
“ON/OFF” button, users can return to the main interface but not power on/off the unit.
3.2 User Parameter Settings
User parameters can be set in power-on or power-off status.
(1) Press and hold the “FUNCTION” button for five seconds. The temperature area displays “C00”.
Press and hold the “FUNCTION” button for another five seconds to enter the wired controller
parameter setting interface. The temperature area displays “P00”.
(2) Select a parameter code by pressing “ ” or “ ”. Press the “MODE” button to switch to parameter
value settings. The parameter value blinks. Adjust the parameter value by pressing “ ” or “ ” and
then press the “ENTER/CANCEL” button to complete settings.
(3) Press the “ENTER/CANCEL” button to return to the upper-level menu till quitting parameter
settings.
(4) The user parameter setting list is as follows:
Parameter
Code
Parameter
Name Parameter Range Default
Value Remark
P10 Master IDU
settings
00: does not change the
master/slave status of the
current IDU
01: sets the current IDU
to master IDU
00
After the IDU connected
with the current wired controller is
successfully set to master IDU, "MASTER"
on the wired controller is on.
P11
Infrared
connection
settings of
wired controller
00: disabled
01: enabled 01
This setting can only be enabled through the
master wired controller.
When the infrared remote receiving function
of the wired controller is disabled, neither the
master nor slave wired controller can receive
remote signals. The wired controllers can
only be operated by pressing.
P13
Wired controller
address
settings
01: master wired
controller
02: slave wired controller
01
When two wired controllers simultaneously
control one IDU, the two wired controllers
should use different addresses. The slave
wired controller (address: 02) does not have
the unit parameter setting function except its
own address settings.
P30
Static pressure
settings for
indoor fan
Type 1: 03.04.05.06.07
Type 2:
01.02.03.04.05.06.07.08.
09
05
After identifying the IDU type, the wired
controller only displays the available
static pressure levels.
1) The static pressure levels fall into five
levels and nine levels for VRF IDUs. The
wired controller only displays the static
pressure levels matched with the
identified IDU type.
2) When the HBS network consists of IDUs
with both five and nine static pressure
levels, the wired controller displays nine
adjustable static pressure levels
according to the maximum control
principle. If the static pressure levels
received by the IDU from the wired
controller, remote controller, or remote
monitoring system exceed the setting
range, the limit value prevails.
3)During power-on and synchronization, the
setting value of static pressure levels is

Duct type split Air conditioner Inverter Series
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Parameter
Code
Parameter
Name Parameter Range Default
Value Remark
determined by settings of the IDU.
P31 High-ceiling
installation
00: standard-ceiling
installation height
01: high-ceiling
installation height
00
P33 Timer function
settings
00: common timing
01: time-point timing 00
P34
Repeating
validity for
time-point
timing
00: single timing
01: repeated everyday 00 This setting is valid only when the timer
function is set to time-point timing.
P37
Cooling setting
temperature in
automatic mode
17°C -30°C 25 Cooling setting temperature – heating setting
temperature ≥1.
Note: The two settings are still valid in
remote shielding status.
P38
Heating setting
temperature in
automatic mode
16°C -29°C 20
P43
Preferential
operation
settings
00: common operation
01: preferential operation 00
When power supply is insufficient, users are
allowed to power on/off the IDU set with
preferential operation and other IDUs are
forcibly powered off. A fault code is displayed
on the IDU that is forcibly powered off.
P46
Accumulated
time clearing for
air filter
cleaning
00: not cleared
01: cleared 00
Note:
In parameter setting status, "FAN", “TIMER”, "SLEEP", and "SWING" are invalid. By pressing the
“ON/OFF” button, users can return to the main interface but not power on/off the unit.
3.3 Engineering Parameter Query
Engineering parameters can be queried in power-on or power-off status.
Press and hold the “FUNCTION” button for five seconds to enter the engineering parameter query
interface. The temperature area displays “C00” and “View” is on.
(1) Within five seconds after “C00” is displayed, continuously press the “MODE” button for three times in
an interval less than one second to enter engineering parameter query.
(2) Select a parameter code by pressing “ ” or “ ”.
(3) Press the “ENTER/CANCEL” button to return to the upper-level menu till quitting parameter query.
In the engineering parameter query interface, users can also query user parameters listed in Table 3.1.
The engineering parameter query list is as follows:
Parameter
Code Parameter Name Parameter Range View Method
C00 Parameter setting
ingress (default) -
Display mode:
Timer area: displays the project number of the current IDU.
Note: If the current HBS network consists of multiple IDUs, only
the IDU that has the minimum project number is displayed.
C02 Indoor unit
capacity query -
Operation method:
In “C02” status, press the “MODE” button to enter the preferential
operation query interface. Press " " or " " to switch the project
number of IDU.

Duct type split Air conditioner Inverter Series
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Parameter
Code Parameter Name Parameter
Range View Method
Display mode:
Temperature area: displays the project number of the current IDU.
Timer area: displays the current IDU capacity/IDU capacity after
adjustment.
C05
Historical fault
query ingress of
IDU
Five historical
faults
Operation method:
1. In “C05” status, press the “MODE” button to enter the historical
fault query interface. Press " " or " " to switch the project
number of IDU. Press the “MODE” button to enter fault code query
of the current IDU. Press “ ” or “ ” to switch the fault SN. Press
the “ENTER/CANCEL” button to return to the upper-level menu.
Display mode:
Temperature area: displays the fault SN and fault code.
Timer area: displays the project number of IDU.
C10
Static pressure
setting query of
ODU
00: 0 Pa
20: 20 Pa
50: 50 Pa
82: 82 Pa
Operation method:
In “C10” status, press the “MODE” button to enter static pressure
setting query of ODU. Press " " or " " to switch the ODU
address.
Display mode:
Temperature area: displays the address of the current ODU.
Timer area: displays the static pressure setting value.
C13
Outdoor unit
network number
query
1-255 Timer area: displays the network number of the current ODU.
C14
Temperature
query for
inlet-tube
temperature
sensor of IDU
-9 to 99
Operation method:
In “C14” status, press the “MODE” button to enter inlet-tube
temperature sensor query of IDU. Press " " or " " to switch the
IDU SN.
Display mode:
Temperature area: displays the project number of the current IDU.
Timer area: displays the temperature value.
If the HBS network consists of only one IDU, the timer area
directly displays the temperature value in the “C14” interface.
No matter Fahrenheit or Centigrade remote signals are received,
the temperature is displayed in Centigrade.
When the wired controller displays the inlet-tube temperature after
receiving signals from the remote controller, the inlet-tube
temperature of the IDU that has the minimum project number in the
HBS network is displayed by default.

Duct type split Air conditioner Inverter Series
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Parameter
Code Parameter Name Parameter
Range View Method
C15
Temperature
query for outlet
temperature
sensor of IDU
-9 to 99
Operation method:
In “C15” status, press the “MODE” button to enter outlet
temperature sensor query of IDU. Press " " or " " to switch the
IDU SN.
Display mode:
Temperature area: displays the project number of the current IDU.
Timer area: displays the temperature value.
If the HBS network consists of only one IDU, the timer area
directly displays the temperature value in the "C14" interface.
No matter Fahrenheit or Centigrade remote signals are received,
the temperature is displayed in Centigrade.
When the wired controller displays the inlet-tube temperature after
receiving signals from the remote controller, the inlet-tube
temperature of the IDU that has the minimum project number in the
HBS network is displayed by default.
C16
Opening degrees
query of electronic
expansion valve
of IDU
0-20
Operation method:
In “C16” status, press the “MODE” button to enter electronic
expansion valve opening degree query of IDU. Press " " or " "
to switch the IDU SN.
Display mode:
Temperature area: displays the project number of the current IDU.
Timer area: displays the opening degree value.
If the HBS network consists of only one IDU, the timer area
directly displays the opening degree value of electronic expansion
valve in the “C16” interface.
When the wired controller displays the opening degree of
electronic expansion valve after receiving signals from the remote
controller, the opening degree of electronic expansion valve of the
IDU that has the minimum project number in the HBS network is
displayed by default.
n2
Capacity
configuration ratio
upper-limit of
outdoor/IDU
35: 135%
50: 150%
Temperature area: displays the parameter code.
Timer area: displays the setting value of capacity configuration
ratio of the current outdoor/IDU.
n6
Historical fault
query ingress of
ODU
Five historical
faults
Operation method:
In “n6” status, press the “MODE” button to enter fault code query
of ODU (when a wired controller controls multiple IDUs, only the
faults memorized by the IDU that has the minimum project number
can be queried). Press “ ” or “ ” to switch the fault SN. Press
the “ENTER/CANCEL” button to return to the upper-level menu.
Display mode:
Temperature area: displays the fault SN and fault code from left to
right (1-5, faults are arranged from the earliest to the latest).
Timer area: displays the project number of the ODU.
n7 Parameter query
ingress of ODU
01-13
25-29
Operation method (n7 query is not supported for the slave wired
controller):
In “n7” status, the timer area is not displayed. Press the “MODE”
button to enter parameter query of ODU. The first bit in the
temperature area (display bit of the ODU module ID) blinks. Press
“▲” or “▼” to switch the ODU module ID. Press the “MODE”
button to select an ODU module. In this case, the first bit in the
temperature area stops blinking, and the second and third bits in
the temperature area display the parameter code. The timer area

Duct type split Air conditioner Inverter Series
16
Parameter
Code Parameter Name Parameter
Range View Method
displays a corresponding parameter value. Press “▲” or “▼” to
switch the parameter code and press the “ENTER/CANCEL”
button to return to the upper-level menu.
Display mode:
Temperature area: displays the ODU module ID and parameter
code from left to right.
Timer area: displays a corresponding parameter value to the right.
Paramete
r
Code Parameter Name Unit
01 Outdoor environment
temperature °C
02 Operation frequency of
compressor 1 Hz
03 Operation frequency of
compressor 2 Hz
04 Operation frequency of outdoor
fan Hz
05 Module high-pressure °C
06 Module low-pressure °C
07 Discharge temperature of
compressor 1 °C
08 Discharge temperature of
compressor 2 °C
09 Discharge temperature of
compressor 3 °C
10 Discharge temperature of
compressor 4 °C
11 Discharge temperature of
compressor 5 °C
12 Discharge temperature of
compressor 6 °C
13 Operation frequency of
compressor 3 Hz
25
Outdoor unit heating EXV1
(Actual value = Displayed value *
10)
PLS
26
Outdoor unit heating EXV2
(Actual value = Displayed value *
10)
PLS
27
Subcooler EXV
(Actual value = Displayed value *
10)
PLS
28 Defrosting temperature °C
29 Liquid-extracting temperature of
subcooler °C
30 Outlet temperature of
accumulator °C
31 Oil return temperature °C
32 Inlet-tube temperature of
condenser °C
33 Outlet temperature of condenser °C
A6
Unit
cooling/heating
function
nA:
cooling/heating
nC:
single-cooling
nH:
single-heating
nF: air supply
Temperature area: displays the parameter code.
Timer area: displays the cooling/heating function setting value of
the current unit.
nb Bar code query of
IDU 0-9, A-Z, a-z, -
Operation method (nb query is not supported for the slave wired
controller):
In “nb” status, the timer area is not displayed. Press the “MODE”
button to enter bar code query. The temperature area displays
“nb” and the project number in the timer area blinks. Press “▲” or

Duct type split Air conditioner Inverter Series
17
Parameter
Code Parameter Name Parameter
Range View Method
“▼” to switch the project number of IDU.
Press the “MODE” button to select an IDU. The temperature area
displays “Un” and the timer area displays “-n”. Press “▲” or “▼” to
display the entire-unit bar code and controller bar code of IDU.
Press the “ENTER/CANCEL” button to return to the upper-level
menu. The temperature area displays “nb” and the timer area
displays the project number of the queried IDU. Press the
“ENTER/CANCEL” button again to return to the upper-level menu.
Display mode:
Temperature area: displays nb/Un/Pc/bar code.
Timer area: displays -n/project number/bar code.
The following is an example:
Example Temperature
Area
Timer
Area Remark 1 Remark 2
Entire-init bar
code of IDU
N1r0128150066
Un (to the
right)
-n
(in the
middle)
It indicates
that the
following is
the entire-unit
bar code of
IDU.
Press “▼” to
display
downward and
press “▲” to
display
upward.
N1r 0128
It indicates
the former
seven bits of
the bar code.
150 066
It indicates
the latter six
bits of the bar
code.
Controller bar
code of IDU
N1r0128150067
Pc -n
It indicates
that the
following is
the controller
bar code of
IDU.
N1r 0128
It indicates
the former
seven bits of
the bar code.
150 067
It indicates
the latter six
bits of the bar
code.
Note:
1. Un indicates the entire-unit bar code of IDU and Pc indicates
the controller bar code of IDU.
2. When there is only one IDU, press the “MODE” button in “nb”
status to enter bar code query without selecting the project
number of IDU.
3. The system quits the query status if no operations are
performed in 60 seconds.
4. The bar code query starts from the entire-unit bar code of IDU
and ends at the controller bar code of IDU without circulation. That
is, the query does not start again even if users press “▼”.
Note:
In parameter query status, "FAN", “TIMER”, "SLEEP", and "SWING" are invalid. By pressing the
“ON/OFF” button, users can return to the main interface but not power on/off the unit.
3.4 Engineering Parameter Settings
Engineering parameters can be set in power-on or power-off status.

Duct type split Air conditioner Inverter Series
18
(1) Press and hold the “FUNCTION” button for five seconds. The temperature area displays “C00”.
Continuously press the “MODE” button for three times, and then press and hold the
“FUNCTION” button for five seconds to enter the engineering parameter setting interface. The
temperature area displays “P00”.
(2) Select a parameter code by pressing “ ” or “ ”. Press the “MODE” button to switch to parameter
value settings. The parameter value blinks. Adjust the parameter value by pressing “ ” or “ ” and
then press the “ENTER/CANCEL” button to complete settings.
(3) Press the “ENTER/CANCEL” button to return to the upper-level menu till quitting parameter
settings.
In the engineering parameter setting interface, users can also set user parameters. The engineering
parameter setting list is as follows:
Parameter
Code Parameter Name Parameter Range Default Value Remark
P15 Power-down
memory mode
00: standby after
power-down recovery
01: restoring the original
status after power-down
recovery
00 --
P17 Historical fault
clearing for IDU
00: not cleared
01: cleared 00
Historical faults of all IDUs controlled
by the current wired controller are
cleared.
P20
Environment
temperature
sensor settings
for IDU
01: temperature sensor
of air return vent
02: temperature sensor
of wired controller
03: temperature sensor
of air return vent for
cooling, dehumidifying,
and air supply;
temperature sensor of
wired controller for
heating
04: temperature sensor
of wired controller for
cooling, dehumidifying,
and air supply;
temperature sensor of
air return vent for
heating
03
When there are master and slave
wired controllers and the
temperature sensor of wired
controller is used, only the
temperature sensor of the master
wired controller is used by default.
Note:
1) In automatic mode, the
environment temperature sensor
settings are invalid for a common
IDU but the setting value is
memorized.
2)The environment temperature
sensor settings are invalid for a
fresh-air IDU. The temperature
sensor of air return vent is used by
default.
P21
Corrected value
of environment
temperature
sensor of IDU (for
cooling,
dehumidifying,
and air supply)
-15 to +15
Temperature
sensor of unit:
0°C; temperature
sensor of wired
controller: 0°C
Press “ ” or “ ” to add or reduce
by 1°C.
P22
Corrected value
of environment
temperature
sensor of IDU (for
heating, fast
heating, and air
warming)
-15 to +15
Temperature
sensor of unit:
-2°C;
temperature
sensor of wired
controller: 0°C
Press ” ” or ” ” to add or reduce
by 1°C.
The temperature sensor of unit and
the temperature sensor of wired
controller share the same corrected
value.
In heating mode, corrected value of
temperature sensor of unit =
corrected value of temperature
sensor of wired controller - 2°C.
P32 Capacity -40% to +40% 00 Press " " or " " to add or reduce