Gree CAS12HP230V1BC User manual

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CAS12HP230V1BC
CAS18HP230V1BC
CAS24HP230V1BC
G R E E C O M F O R T . C O M
Service Manual
Cassette B Series

Multi-zone Cassette B
Installation, Service & Troubleshooting
Models:
CAS12HP230V1BC
CAS18HP230V1BC
CAS24HP230V1BC

Service Manual
Table of Contents
Part Ⅰ: Technical Information........................................................................1
1. Summary......................................................................................................................1
2. Specications..........................................................................................................2
2.1 Specication Sheet...........................................................................................................2
3. Outline Dimension Diagram........................................................................5
4. Refrigerant System Diagram......................................................................6
5. Electrical Part...........................................................................................................7
5.1 Wiring Diagram.................................................................................................................7
5.2 PCB Printed Diagram .......................................................................................................9
6. Function and Control......................................................................................10
6.1 Remote Controller Introduction .....................................................................................10
6.2 Brief Description of Modes and Functions......................................................................15
Part Ⅱ: Installation and Maintenance .................................................18
7. Notes for Installation and Maintenance..........................................18
8. Installation................................................................................................................21
8.1 Installation Dimension Diagram......................................................................................21
8.2 Preparative for Installation.............................................................................................22
8.3 Installation of Cassette Type ..........................................................................................23
8.4 Installation of the Connection Pipe.................................................................................24
8.5 Installation of the Drain Hose ........................................................................................26
8.6 The Panel Installation ....................................................................................................27
8.7 Electrical Wiring..............................................................................................................28
8.8 Installation of Controrllers..............................................................................................29
9. Maintenance............................................................................................................30
9.1 Error Code List ...............................................................................................................30
9.2 Troubleshooting for Main Malfunction ............................................................................31
9.3 Maintenance Method for Normal Malfunction.................................................................37
10. Exploded View and Parts List ..............................................................39
11. Removal Procedure.......................................................................................45
Table of Contents

Service Manual
Table of Contents
Appendix:........................................................................................................................49
Appendix 1: Reference Sheet of Celsius and Fahrenheit ....................................................49
Appendix 2: Conguration of Connection Pipe.....................................................................49
Appendix 3: Pipe Expanding Method ...................................................................................50
Appendix 4: List of Resistance for Temperature Sensor ......................................................51

1
Technical Information
Service Manual
1. Summary
Part Ⅰ: Technical Information
Indoor Unit
CAS12HP230V1BC
CAS18HP230V1BC
CAS24HP230V1BC
Remote Controller
YAP1FFB

2Technical Information
Service Manual
Parameter Unit Value
Model CAS12HP230V1BC CAS18HP230V1BC
Product Code CN510N0190_X20047 CN510N0210_X20047
Power
Supply
Rated Voltage V~ 208/230 208/230
Rated Frequency Hz 60 60
Phases 1 1
Cooling Capacity Btu/h 12000 14400
Heating Capacity Btu/h 13000 16000
Air ow volume(H/M/L/SL) CFM 330/306/265/- 394/347/265/-
Dehumidifying Volume Pint/h 2.96 3.80
Fan Type Centrifugal Centrifugal
Fan Diameter-height inch Φ12 11/16-5 13/16 Φ12 11/16-5 13/16
Fan Motor Cooling Speed(SH/H/M/L/SL) rpm 800/700/650/560/- 900/850/750/580/-
Fan Motor Heating Speed(SH/H/M/L/SL) rpm 800/700/650/580/- 900/850/750/600/-
Fan Motor Power Output W 45 45
Fan motor running current A / /
Fan Motor Capacitor μF / /
Evaporator Material Aluminum n-copper tube Aluminum n-copper tube
Evaporator Pipe Diameter inch Φ1/4 Φ1/4
Evaporator Number of Rows-Fin Pitch 2 2
Evaporator Length(L)XHeight(H)XWidth(W) inch 52X7 1/2X1 52X7 1/2X1
Fuse Current A 5 5
Sound Pressure Level(SH/H/M/L/SL) dB (A) 44/41/38/34/- 47/45/41/35/-
Sound Power Level(SH/H/M/L/SL) dB (A) 55/52/49/45/- 58/56/52/46/-
Dimension of Outline(LXWXH) inch 23 7/16X23 7/16X9 7/16 23 7/16X23 7/16X9 7/16
Dimension of Carton Box(LXWXH) inch 30 1/2X28 15/16X11 1/4 30 1/2X28 15/16X11 1/4
Dimension of Package(LXWXH) inch 30 5/8X29 1/16X11 13/16 30 5/8X29 1/16X11 13/16
Net Weight lb 44.1 44.1
Gross Weight lb 52.92 52.92
Liquid pipe inch Φ1/4 Φ1/4
Gas Pipe(to indoor unit) inch Φ3/8 Φ1/2
2. Specications
2.1 Specication Sheet
The above data is subject to change without notice. Please refer to the nameplate of the unit.

3
Technical Information
Service Manual
Parameter Unit Value
Model CAS24HP230V1BC
Product Code CN510N0200_X20047
Power
Supply
Rated Voltage V~ 208/230
Rated Frequency Hz 60
Phases 1
Cooling Capacity Btu/h 22800
Heating Capacity Btu/h 27400
Air ow volume(H/M/L/SL) CFM 718/647/518/-
Dehumidifying Volume Pint/h 5.28
Fan Type Centrifugal
Fan Diameter-height inch Φ17 11/16-5 5/8
Fan Motor Cooling Speed(SH/H/M/L/SL) rpm 650/620/560/450/-
Fan Motor Heating Speed(SH/H/M/L/SL) rpm 650/620/560/460/-
Fan Motor Power Output W 45
Fan motor running current A /
Fan Motor Capacitor μF /
Evaporator Material Aluminum n-copper tube
Evaporator Pipe Diameter inch Φ1/4
Evaporator Number of Rows-Fin Pitch 2
Evaporator Length(L)XHeight(H)XWidth(W) inch 77 3/8X6 3/4X1
Fuse Current A 5
Sound Pressure Level(SH/H/M/L/SL) dB (A) 47/45/41/36/-
Sound Power Level(SH/H/M/L/SL) dB (A) 58/56/52/47/-
Dimension of Outline(LXWXH) inch 33 1/16X33 1/16X9 7/16
Dimension of Carton Box(LXWXH) inch 37 13/16X37 13/16X12 3/16
Dimension of Package(LXWXH) inch 37 15/16X37 15/16X12 13/16
Net Weight lb 57.33
Gross Weight lb 70.56
Liquid pipe inch Φ3/8
Gas Pipe(to indoor unit) inch Φ5/8
The above data is subject to change without notice. Please refer to the nameplate of the unit.

4Technical Information
Service Manual
Note: Nominal capacities are based on the follow conditions.
Mode Indoor ( ) Outdoor ( )
Cooling
DB:80.6(27)DB:95(35)
WB:66.2(9)WB:75.2(24)
Heating
DB:68(20)DB:44.6(7)
WB:--(--)WB:42.8(6)
Piping Length 3/16 inch
The air volume is measured at the relevant standard external static pressure.
Noise is tested in the semianechoic room, so it should be slightly higher in the actual operation due
to environmental change.
Mode Range of Outdoor Temperature℃(󱙜)
Cooling
Heating
5-118.4(-15-48)
14-75.2(-10-24)

5
Technical Information
Service Manual
3. Outline Dimension Diagram
CAS24HP230V1BC
CAS12HP230V1BC CAS18HP230V1BC
Item
Model ABCDEFG
CAS12HP230V1BC
CAS18HP230V1BC
CAS24HP230V1BC
26 3/826 1/423 5/819 1/2511/1697/16 23 7/16
37 3/833 1/16 30 11/16 26 3/4511/1697/16 -
Unit: inch

6Technical Information
Service Manual
4. Refrigerant System Diagram

7
Technical Information
Service Manual
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5. Electrical Part
5.1 Wiring Diagram
● Indoor Unit
● Instruction
Symbol Symbol Color Symbol Symbol Color Symbol Name
WH White GN Green CAP Jumper cap
YE Yellow BN Brown COMP Compressor
RD Red BU Blue Grounding wire
YEGN Yellow/Green BK Black / /
VT Violet OG Orange / /
Note: Jumper cap is used to determine fan speed and the swing angle of horizontal lover for this model.
600007061910
CAS12HP230V1BC CAS18HP230V1BC

8Technical Information
Service Manual
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These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
CAS24HP230V1BC

9
Technical Information
Service Manual
5.2 PCB Printed Diagram
1
2
3
456789 10
12
11
13
16 1415
No. Name
1Interface of fan
2Interface of live wire
Fuse
3
4 Interface of netural wire
5Air terminal
6Terminal with outdoor unit
communication wire
7 Water pump control
8
Interface of ambient temperature sensor
9 Interface of tube temperature sensor
10 Water full detection terminal
12 Jumper cap terminal
Up&down swing motor
Display interface
11
14 Wired controller
16
13
Grounding wire
15 Interface of gate-control detection
● Top view
● Bottom view

10 Technical Information
Service Manual
6. Function and Control
6.1 Remote Controller Introduction
Send signal
Turbo mode
8ćheating function
Switch temperature displaying type on
the unit’s display
Set time
T-ON /T-OFF
Child lock
Up & down swing
Left & right swing
Sleep mode
Clock
Heat mode
Fan mode
Dry mode
Cool mode
Auto mode
Operation mode
I feel
Quiet
WiFi
This is a general remote controller.Some
models have this function while some
do not. Please refer to the actual models.
{
Set fan speed
(No 、fan speed. It’s displayed
only after turning it on.)
{
6
3
7
9
10
14
15
13
12
8
11
5
4
2
1
1ON/OFF button
2MODE button
3FAN button
4TURBO button
6button
7button
9I FEEL button
13
LIGHT button
14
15 TEMP button
11
CLOCK button
12
10
T-ON / T-OFF button
8
SLEEP button
5▲/ button
▲
button
X-FAN function
Healthy mode
Scavenging functions
X-FAN button
(Note: X-FAN is the
same with BLOW.)
Introduction for icons on display screen
Note:
● After putting through the power, the air conditioner will give out a sound.Operation indicator " " is ON (red indicator,
the colour
is different for different models). After that, you can operate the air conditioner by using remote controller.
● Under on status, pressing the button on the remote controller, the signal icon " " on the display of remote controller will blink
once and the air conditioner will give out a “de” sound, which means the signal has been sent to the air conditioner.
● This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the
model doesn't have, if press the corresponding button on the remote controller that the unit will keep the original running status.

11
Technical Information
Service Manual
● When selecting auto mode, air conditioner will operate automatically according to the sensed temperature. Set temperature can
’t be adjusted and
will not be displayed as well. Press " FAN" button can adjust fan speed. Press " " / " " button can adjust fan blowing angle.
● After selecting cool mode, air conditioner will operate under cool mode. Cool indicator " " on indoor unit is ON(This indicator is not available for
some models). Press "▲" or " " button to adjust set temperature. Press "FAN" button to adjust fan speed. Press " " / " " button to adjust fan
blowing angle.
● When selecting dry mode, the air conditioner operates at low speed under dry mode. Dry indicator " " on indoor unit is ON(This indicator is not
available for some models). Under dry mode, fan speed can’t be adjusted. Press " " / " " button to adjust fan blowing angle.
● When selecting fan mode, the air conditioner will only blow fan, no cooling and no heating. All indicators are OFF,Operation indicator is ON(This
indicator is not available for some models). Press "FAN" button to adjust fan speed. Press" " / " " button to adjust fan blowing angle.
● When selecting heating mode, the air conditioner operates under heat mode.Heat indicator " " on indoor unit is ON. Press "▲" or " " button
to adjust set temperature. Press " FAN" button to adjust fan speed. Press " " / " " button to adjust fan blowing angle. (Cooling only unit won’t re-
ceive heating mode signal. If setting heat mode with remote controller, press ON/OFF button can’t start up the unit).
1. ON/OFF button
2. MODE button
▲
▲
Press this button to turn on the unit. Press this button again to turn off the unit.
Press this button to select your required operation mode.
AUTO COOL FANDRYHEAT
● When setting TIMER ON, TIMER OFF or CLOCK, press "▲" or " " button to adjust time. (Refer to CLOCK, TIMER ON, TIMER OFF buttons)
3. FAN button
Pressing this button can set fan speed circularly as: auto (AUTO), low( ), medium( ), high( ).
Auto
Note:
● For preventing cold air , after starting up heating mode, indoor unit will delay 1~5 minutes to blow air (actual delay time is depend on indoor amb-
ient temperature).
● Set temperature range from remote controller: 61-86°F (16~30℃); Fan speed: auto, low speed, medium speed, high speed.
speed,high speed.
4. TURBO button
Under COOL or HEAT mode, press this button to turn to quick COOL or quick HEAT mode. " " icon is displayed on remote controller. Press
this button again to exit turbo function and " " icon will disappear.
If start this function, the unit will run at super-high fan speed to cool or heat quickly so that the ambient temp. approachs the preset temp. as
soon as possible.
▲
5.▲/ button
● Press "▲" or " " button once increase or decrease set temperature 1 Holding "▲" or " " button, 2s later, set temperature on remote con-
troller will change quickly. On releasing button after setting is finished, temperature indicator on indoor unit will change accordingly.(Temperature
can’t be adjusted under auto mode)
°F (ć).
▲
▲
▲
● It’s Low fan speed under Dry mode.
● Under AUTO speed, air conditioner will select proper fan speed automatically according to ex-factory setting.
Note:
6. button
7. button
Note:
● Press this button continuously more than 2s, the main unit will swing back and forth from left to right, and then loosen the button, the unit will stop
swinging and present position of guide louver will be kept immediately .
● Under swing left and right mode, when the status is switched from off to , if press this button again 2s later, status will switch to off status dir
ectly; if press this button again within 2s, the change of swing status will also depend on the circulation sequence stated above.
● This function is applicable to partial of models.
Press this button can select left & right swing angle. Fan blow angle can be selected circularly as below:
no display
(stops at current position)
Press this button can select up & down swing angle. Fan blow angle can be selected circularly as below:
no display
(horizontal louvers stops
at current position)

12 Technical Information
Service Manual
● When selecting " ", air conditioner is blowing fan automatically. Horizontal louver will automatically swing up & down at maximum angle.
● When selecting "
ǃǃ ǃǃ
", air conditioner is blowing fan at fixed position. Horizontal louver will stop at the fixed position.
● When selecting "
ǃǃ
", air conditioner is blowing fan at fixed angle.Horizontal louver will send air at the fixed angle.
● Hold " "
button above 2s to set your required swing angle. When reaching your required angle, release the button.
Note:
● "
ǃǃ
" may not be available. When air conditioner receives this signal, the air conditioner will blow fan automatically
.
● Press this button continuously more than 2s, the main unit will swing back and forth from up to down, and then loosen the bu
tton, the unit will stop
swinging and present position of guide louver will be kept immediately
.
● Under swing up and down mode, when the status is switched from of
f to , if press this button again 2s later, status will switch to off status
directly; if press this button again within 2s,the change of swing status will also depend on the circulation sequence stated
above.
Note:
● Under on and off status, you can set
T-OFF or T-ON simultaneously.
● Before setting T-ON or
T-OFF, please adjust the clock time.
●
After starting up T-ON or T-OFF, set the constant circulating valid.
After that, air conditioner will be turned on or turned off according to setting time.ON/OFF button has no effect on setting.
If you don’t need this
function, please use remote controller to cancel it.
9. I FEEL butto
n
Press this button to start I FEEL function and " " will be displayed on the remote controller.
After this function is set, the remote controller will send
the detected ambient temperature to the controller and the unit will automatically adjust the indoor temperature according to the detected temperature.
Press this button again
.
to close I FEEL function and " " will disappear.
● Please put the remote controller near user when this function is set. Do not put the remote controller near the object of h
igh temperature or low
temperature in order to avoid detecting inaccurate ambient temperature.
●
T-ON button
"T-ON" button can set the time for timer on.
After pressing this button, " " icon disappears and the word "ON" on remote controller blinks.
Press "▲" or " " button to adjust
T-ON setting. After each pressing "▲" or " " button,T-ON setting will increase or decrease 1min. Hold "▲" or
" " button, 2s later
, the time will change quickly until reaching your required time.
Press "T-ON" to confirm it
. The word "ON" will stop blinking. " " icon resumes displaying. Cancel T-ON: Under the condition that T-ON is started
up,press "T-ON" button to cancel it.
●
T-OFF button
"T-OFF" button can set the time for timer off.
After pressing this button," " icon disappears and the word "OFF" on remote controller blinks.
Press "▲" or " " button to adjust
T-OFF setting. After each pressing "▲" or " " button, T-OFF setting will increase or decrease 1min. Hold "▲" or
"
" button, 2s later, the time will change quickly until reaching your required time.
Press "T-OFF" word "OFF" will stop blinking. " " icon resumes displaying. Cancel T-OFF. Under the condition that
T-OFF is started up, press
"T-OFF" button to cancel it.
▲
▲
▲
▲
8. T-ON /
T-OFF button
▲
▲
Pressing this button in COOL or DRY mode, the icon " " is displayed and the indoor fan will continue operation for a few minutes in order to dry
the indoor unit even though you have turned off the unit. After energization, X-FAN OFF is defaulted.X-FAN is not available in AUTO, FAN or HEAT
mode.
This function indicates that moisture on evaporator of indoor unit will be blowed after the unit is stopped to avoid mould
.
● Having set X-F
AN function on: After turning off the unit by pressing ON/OFF button indoor fan will continue running for about a few minutes. at low
speed.In this period, press X-F
AN button to stop indoor fan directly.
● Having set X-FAN function off: After turning off the unit by pressing ON/OFF button, the complete unit will be off directly.
12. X-F
AN button
Press this button to set clock time. " " icon on remote controller will blink. Press "▲" or " " button within 5s to set clock time. Each pressing of
Note:
● Clock time adopts 24-hour mode.
● The interval between two operation can’t exceeds 5s. Otherwise, remote controller will quit setting status. Operation for T-ON/T-OFF is the same.
10. CLOCK butto
n
11. SLEEP button
Under COOL, or HEAT mode, press this button to start up sleep function." " icon is displayed on remote controller. Press this button again to
cancel sleep function and " " icon will disappear.After powered on, Sleep Off is defaulted. After the unit is turned off, t
he Sleep function is canceled.
In this mode, the time of time can be adjusted. Under Fan、DRY and Auto modes,this function is not available.
▲
▲
▲
"▲" or " " button,clock time will increase or decrease 1 min ute. If hold "▲" or " " button, 2s later,time
will change quickly. Release this button
when
reaching your required time.

13
Technical Information
Service Manual
13. button
Press this button to achieve the on and off of healthy and scavenging functions in
LCD displays " ". Press the button for the second time to start healthy and scavenging functions simultaneously; LCD displays " " and " ".
Press this button for the third time to quit healthy and scavenging functions simultaneously.
Press the button for the fourth t ime to start healthy function; LCD display " ".
Press this button again to repeat the operation above.
● This function is applicable to partial of models.
14. LIGHT button
Press this button to turn off display light on indoor unit. " " icon on remote controller disappears. Press this button again to turn on display light.
" " icon is displayed.
15. TEMP button
By pressing this button, you can see indoor set temperature, indoor ambient temperature or outdoor ambient temperature on indoor unit’s display.
The setting on remote controlleris selected circularly as below:
no display
● When selecting " " or no display with remote controller, temperature indicator on indoor unit displays set temperature.
● When selecting " " with remote controller, temperature indicator on indoor unit displays indoor ambient temperature.
● When selecting " " with remote controller, temperature indicator on indoor unit displays outdoor ambient temperature.
Note:
● Outdoor temperature display is not available for some models. At that time, indoor unit receives " " signal, while it displays indoor set temperature.
● It’s defaulted to display set temperature when turning on the unit.There is no display in the remote controller.
● Only for the models whose indoor unit has dual-8 display.
● When selecting displaying of indoor or outdoor ambient temperature, indoor temperature indicator displays corresponding temperature and auto-
matically turn
Energy-saving function
Under cooling mode, press "TEMP" and " CLOCK" buttons simultaneously to start up or turn off energy-saving function. When energy-saving function is
started up, "SE" will be shown on remote controller, and air conditioner will adjust the set temperature automatically according to ex-factory setting to
reach to the best energy-saving effect. Press "TEMP" and "CLOCK" buttons simultaneously again to exit energy-saving function.
Note:
● Under energy-saving function, fan speed is defaulted at auto speed and it can’t be adjusted.
● Under energy-saving function, set temperature can’t be adjusted. Press "TURBO" button and the remote controller won’t send signal.
● Sleep function and energy-saving function can’t operate at the same time. If energy-saving function has been set under cooling mode, press sleep
button will cancel energy-saving function. If sleep function has been set under cooling mode, start up the energy-saving functi
on will cancel sleep function.
Function introduction for combination buttons
8ć heating function
Under heating mode, press "TEMP" and "CLOCK" buttons simultaneously to start
up or turn off 8
ć
When this function is started up, " " and "8
heating function.
ć
"
heating status
will be shown on remote controller, and the air conditioner keep the
at 8ć. Press "TEMP" and "CLOCK" buttons simultaneously again to exit 8ć
heating function.
●
●
Under 8
ćheating function, fan speed is defaulted at auto speed and it can’t be adjusted.
●
Under
8 ćheating function, set temperature can’t be adjusted. Press “ TURBO " button and the remote controller won’t
send signal.
Sleep function and
8
ćheating function can’t operate at the same time. If 8ć
● Under temperature display, the remote controller will display 46 heating.
heating function has been set under cooling
the
8ćheating function will cancel sleep function.
mode, press sleep button will cancel 8ćheating function. If sleep function has been set under cooling mode, start up
Child lock function
Temperature display switchover function
Under OFF status, press " " and "MODE
▲
" buttons simultaneously to switch display between ćand 
▲
Press "▲" and " " simultaneously to turn on or turn off child lock function. When child lock function is on, " " icon is
displayed on remote controller. If you operate the remote controller, the " " icon will blink three times without sending signal
to the unit.

14 Technical Information
Service Manual
.
1. After putting through the power, press "ON/OFF" button on remote controller to turn on the air conditioner.
2.
Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN, HEAT.
3. Press "▲" or " " button to set your required temperature. (Temperature can’t be adjusted under auto mode).
4. Press "FAN" button to set your required fan speed: auto, low speed, low-medium speed,medium speed, medium-high
speed,high speed.
Operation guide
▲
Replacement of batteries in remote controller
Note:
5.
Press " " button to select fan blowing angle.
1. Lift the cover along the direction of arrow (as shown in Fig 1 ǐ).

2. Take out the original batteries (as shown in Fig 1 Ǒ).
3. Place two 7# (AAA 1.5V) dry batteries, and make sure the position of “+” polar and “-” polar is correct (as shown in Fig 2ǒ).
4. Reinstall the cover (as shown in Fig 2 Ǔ).
Fig.1
Fig.2
● During operation, point the remote co ntrol signal sender at the receiving window on indoor unit.
● The distance between signal sender and receiving window should be no more than 8m, and there should be no obstacles
between them.
● Signal may be interfered easily in the room where there is fluorescent lamp
be close to indoor unit during
or wireless telephone; remote controller should
operation.
● Replace new batteries of the same model when replacement is required.
● When you don’t use remote controller for a long time, please take out the batteries.
● If the display on remote controller is fuzzy or there ’s no display, please replace batteries.
WIFI Function
Press "MODE" and "TURBO" button simultaneously to turn on or turn off WIFI function. When WIFI function is turned on,
the " WiFi" icon will be displayed on remote controller; Long press "MODE" and "TURBO" buttons simultaneously for 10s,
remote controller will send WIFI reset code and then the WIFI function will be turned on. WIFI function is defaulted ON after
energization of the remote controller.
● This function is only available for some models.
About Back-lighting Function
If “H1” is displayed on the remote controller while it’s not operated by the professional person/after-sales person, it belongs
to the misoperation.
Please operate it as below to cancel it.Under the OFF status of remote controller, hold the “MODE” button and “X-FAN”
buttons simultaneously for 5s to cancel “H1” display.
Note:
● If remote controller displays “H1”, it belongs to the normal function reminder. If the unit is defrosting under heating mode, it
operates according to H1 defrosting mode. “H1” won’t be displayed on the panel of indoor unit;
● Once you set H1 mode, if you turn off unit by remote controller, H1 will display 3 times on the remote controller and then
disappear;
● Also, when you set H1 mode, when you change to heating mode, H1 will display 3 times on the remote controller and then
disappear.

15
Technical Information
Service Manual
6.2 Brief Description of Modes and Functions
1.Basic function of system
(1)Cooling mode
(1) Under this mode, fan and swing operates at setting status. Temperature setting range is 61-86°F(16~30OC).
(2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status.
(2)Drying mode
(1) Under this mode, fan operates at low speed and swing operates at setting status. Temperature setting range is 61-86°F(16~30OC).
(2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status.
(3) Protection status is same as that under cooling mode.
(4) Sleep function is not available for drying mode.
(3)Heating mode
(1) Under this mode, Temperature setting range is 61-86°F(16~30OC).
(2) Working condition and process for heating mode:
When turn on the unit under heating mode, indoor unit enters into cold air prevention status. When the unit is stopped or at OFF status,
and indoor unit has been started up just now, the unit enters into residual heat-blowing status.
(4)Working method for AUTO mode:
1.Working condition and process for AUTO mode:
a.Under AUTO mode, standard heating Tpreset=68°F(20OC) and standard cooling Tpreset=77°F(25OC.) The unit will switch mode
automatically according to ambient temperature.
2.Protection function
a. During cooling operation, protection function is same as that under cooling mode.
b. During heating operation, protection function is same as that under heating mode.
3. Display: Set temperature is the set value under each condition. Ambient temperature is (Tamb.-Tcompensation) for heat pump unit
and Tamb. for cooling only unit.
4. If theres I feel function, Tcompensation is 0. Others are same as above.
(5)Fan mode
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation.
Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 61-86°F(16~30OC).
2. Other control
(1) Buzzer
Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep.
(2) Auto button
If press this auto button when turning off the unit, the complete unit will operate at auto mode. Indoor fan operates at auto fan speed
and swing function is turned on. Press this auto button at ON status to turn off the unit.
(3) Auto fan
Heating mode: During auto heating mode or normal heating ode, auto fan speed will adjust the fan speed automatically according to
ambient temperature and set temperature.
(4) Sleep
After setting sleep function for a period of time, system will adjust set temperature automatically.
(5) Timer function:
General timer and clock timer functions are compatible by equipping remote controller with different functions.
(6) Memory function
memorize compensation temperature, off-peak energization value.
Memory content: mode, up&down swing, light, set temperature, set fan speed, general timer (clock timer cant be memorized).
After power recovery, the unit will be turned on automatically according to memory content.
(7) Health function
During operation of indoor fan, set health function by remote controller. Turn off the unit will also turn off health function.
Turn on the unit by pressing auto button, and the health is defaulted ON.(Health function is not available for this unit)

16 Technical Information
Service Manual
(8)I feel control mode
After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient
temperature sent by remote controller.
(9)Compulsory defrosting function
(1) Start up compulsory defrosting function
Under ON status, set heating mode with remote controller and adjust the temperature to 61(16OC). Press “+, -, +, -, +,-” button successively
within 5s and the complete unit will enter into compulsory defrosting status. Meanwhile, heating indicator on indoor unit will ON 10s and OFF
0.5s successively. (Note: If complete unit has malfunction or stops operation due to protection, compulsory defrosting function can be started
up after malfunction or protection is resumed.
(2) Exit compulsory defrosting mode
After compulsory defrosting is started up, the complete unit will exit defrosting operation according to the actual defrosting result, and the
complete unit will resume normal heating operation.
(10)Refrigerant recovery function:
(1) Enter refrigerant recycling function
Within 5min after energizing (unit ON or OFF status is ok), continuously press LIGHT button for 3 times within 3s to enter refrigerant
recycling mode; Fo is displayed and refrigerant recycling function is started. At this moment, the maintenance people closes liquid valve.
After 5min, stick the thimble of maintenance valve with a tool. If there is no refrigerant spraying out, close the gas valve immediately and
then turn off the unit to remove the connection pipe.
(2) Exit refrigerant recycling function
After entering refrigerant recycling mode, when receive any remote control signal or enter refrigerant recycling mode for 25min, the unit will
exit refrigerant recycling mode automatically If the unit is in standby mode before refrigerant recycling, it will be still in standby mode after
nishing refrigerant recycling; if the unit is in ON status before refrigerant recycling, it will still run in original operation mode.
(11)Ambient temperature display control mode
1. When user set the remote controller to display set temperature (corresponding remote control code: 01), current set temperature will be
displayed.
2. Only when remote control signal is switched to indoor ambient temperature display status (corresponding remote control code: 10) from
other display status (corresponding remote control code: 00, 01,11),controller will display indoor ambient temperature for 3s and then turn
back to display set temperature.
Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation.
Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 61-86°F(16~30OC).
(12)Off-peak energization function:
Adjust compressors minimum stop time. The original minimum stop time is 180s and then we change to:
The time interval between two start-ups of compressor cant be less than 180+T s(0≤T≤15). T is the variable of controller. Thats to say
the minimum stop time of compressor is 180s~195s. Read-in T into memory chip when refurbish the memory chip each time. After power
recovery, compressor can only be started up after 180+T s at least.
(13) SE control mode
The unit operates at SE status.
(14) X-fan mode
When X-fan function is turned on, after turn off the unit, indoor fan will still operate at low speed for 2min and then the complete unit will be
turned off. When x-fan function is turned off, after turn off the unit, the complete unit will be turned off directly.
(15) 8ºC heating function
Under heating mode, you can set 46°F(8ºC) heating function by remote controller. The system will operate at 46°F(8ºC) set temperature.
(16) Turbo fan control function
Set turbo function under cooling or heating mode to enter into turbo fan speed. Press fan speed button to cancel turbo wind.
No turbo function under auto, dry or fan mode.