Hammer Cassy Series User manual

GUIDE TO THE PRODUCTS FOR CASSY SERIES

CONTENT
▄ General Features
▄ Nomenclature
▄Performance data table
▄Correction ratio
▄Wiring diagram
▄Dimension drawing
▄Controller system introduction
▄Optional parts introduction
General Features:
1.Casing: Casing is made of high quality galvanized steel.Thanks to a integrated blister process ,ensures there is no any water
leakage because of no welding points.It adopts EPS material overal foaming and bonded to the drain pan.It looks elegant and light
thanks to adopting much non metal material.
2.Front panel: 4 way air supply, intake grill,panel frame and adjustable air distribution louver on each side made from ABS.
3.Multiway air supply ensures room temperature much even and comfortable
4.Coil:Coil is designed by coil selection software and tested in factory performance test lab to guarantee the
performance.It adopts Integral type "C" shape design of heat exchanger with high density without interval which makes the
internal air temperature even avoiding area temperature difference caused by internal air twice non even mixture led by twice
bended coil design.Coil design is counter flow which makes higher efficiency.Coil is made of high quality φ9.52 mm
copper tube and high efficient hydrophilic coated aluminum fin.It adopts advanced tube expanding process which
makes the copper tube and the fins touch each other in best way and moreover big diameter and low noise fan
Cassy Series

blower is adopted to make sure the best heat transfer efficiency.The header is made of brass and thanks to the
design, the water flow distributes even and less head loss is achieved which improves the heat exchange
performance.Thanks to the good matching of the fan blower and the new designed air deflector,the performance has
been improved 15%.
5.Condensate drain pan: Adopt blister process and it will be bond together with high condensity E foam drain pan at an
organitic whole after heated. The drain pan and EPS foam both adopt anti fire material
6.Condensate drain pump: Adopt intelligent high lift condensate water drainage pump can make the water height of 750 mm
which makes it more convenient for the setting of drainage pipe and ensures good drainage performance
7.switch protection of water level avoids any water leakage.
8.Motor:Adopt large diameter vortex centrifugal fan ensures low noise running and energy saving.
Adopting three-dimensional large dip angle spiral blades and rolling bearing motor.Motor shaft adopts antirust processed
hardened and tempered steel which ensures longer service life,high efficiency and low noise. Moreover good EPS foam
is helpful on noise absorbing.
9.Automatic swing, the operation of 4 pieces of swing louvers are controlled by separately four stepping motors,more
reliable than one stepping motor linked control structure.

10.Blower: Single air inlet radial fan,fan assembly mounted on anti-vibrating supports guarantees extremely quiet.
11.Filter: Adopt Nylon filter with easy remove design
12.Control system:flexible control way,standard remote handset control(wired wall pad and modbus function optional)
13.Fresh air from outdoor can be introduced into room which improves the indoor air quality
14.Easy Maintenance:
14.1 available to inspect electronic control after removing the return air grill
stepping motor
duct outlet
fresh air inlet

14.2 available to inspect or replace fan and motor after removing air guide ring
Nomenclature:
1: Cassy: cassette fan coil unit
2. KM: Factory Version No.
3. 1: 1 way air supply 4: 4 way air supply
4. V: 2 pipe P: 4 pipe
5. 02: model name
6. D: DX coil
7. R: with remote handset W: with wired wall pad: T: terminal connection
8. A: 50Hz motor B: 60Hz motor
9. G: with group control function M: with Modbus function
10.EH20: with 2 kw electric heater
11.CV2:2way cooling coil valve kits factory built in CV3:3way cooling coil valve kits factory built in
HV2:2way heating coil valve kits factory built in HV3:3way heating coil valve kits factory built in
12. EDP: external drain pan
Cassy KM 4 V 02 D R A G EH20 CV2 EDP
1 2 3 4 5 6 7 8 9 10 11 12

Performance data table(2 PIPE):
KM4-V 02 03 04 047 05 06 08 10 12 14
Air flow
H
m3/h
340 510 680 800 850 1020 1360 1700 2040 2380
M
255 380 510 600 635 765 1020 1275 1530 1785
L 170 255 340 400 425 510 680 850 1020 1190
Cooling
Cap.
Total
H
kW
2.12 3.09 3.94 4.32 5 5.87 7.32 9.59 11.46 13.04
M
1.7 2.6 3.2 3.5 4.1 4.9 6.2 8.0 9.6 11.0
L
1.3 1.9 2.4 2.6 3.1 3.6 4.7 6.1 7.2 8.3
Sensi
ble
H
kW
1.4 2.2 2.7 2.9 3.5 4.1 5.2 6.8 8.0 9.2
M
1.2 1.7 2.2 2.4 2.8 3.3 4.2 5.5 6.4 7.5
L
0.8 1.3 1.6 1.8 2 2.4 3.1 4.0 4.8 5.5
Heating Cap.
H
3.37 4.81 6.21 7.01 7.66 9.62 12.42 15.47 17.43 20.16
M
2.7 3.8 5 5.6 6.1 7.6 9.9 12.3 14 16.2
L
1.9 2.7 3.6 4.1 4.4 5.5 7.1 8.9 10.1 11.7
Water flow rate LPM 6.1
6.1 8.9 11.3 12.4 14.3 16.8 21.5 27.5 32.9
Noise level dB(A)
37/34
/31
39/36/
33
41/39/
37
44/41/
38
43/39/
36
45/41/
38
46/44/
39
48/45/
42
50/47/
45
52/49
/46
Power supply 220V-50Hz
Power input W 35 49 58 70 72 94 130 149 183 220
Running current Amp
0.16 0.22 0.26 0.32 0.33 0.43 0.59 0.68 0.83 1.0
Water pressure drop kPa
16.2 20.8 28.2 36.3 21.5 25.4 35.9 33.6 40 47.2
Drain pipe conn. mm 26
Casing
dimension
L mm 580 752 952
W mm 580 752 952
H mm 275 290 290
Panel dimension mm 650*650*28 850*850*28 1050*1050*28
Water conn.
inlet Inch RC 3/4〞
outlet Inch RC 3/4〞
Note:
1. The above cooling capacity is under entering air temp 27ºC DB/19.5 ºC WB, chilled water inlet 7ºC and water
temperature difference is 5ºC
2. The above heating capacity is under entering air temp 21ºC DB and heating water inelt temp 60ºC, water flow and air
flow same as cooling mode
3. The above noise level is tested under back ground(<17dB(A))
4. LPM: Liter per min.,1LPM=0.06m3 /h.

Performance data table(4 PIPE):
KM4-P 02 03 04 047 05 06 08 10 12 14
Air flow
H
m3/
h
340 510 680 800 850 1020 1360 1700 2040 2380
M 255 380 510 600 635 765 1020 1275 1530 1785
L 170 255 340 400 425 510 680 850 1020 1190
Cooling
Cap.
Total
H
kW
1.76 2.53 3.19 3.47 4.25 5.19 6.01 8.07 9.05 9.81
M 1.41 2.13 2.59 2.81 3.49 4.28 5.07 6.72 7.55 8.25
L 1.08 1.56 1.94 2.11 2.64 3.19 3.82 5.12 5.70 6.21
Sensibl
e
H
kW
1.16 1.80 2.19 2.34 2.98 3.61 4.29 5.68 6.31 6.94
M 1.00 1.39 1.78 1.95 2.38 2.94 3.43 4.64 5.08 5.62
L 0.66 1.07 1.30 1.40 1.70 2.10 2.57 3.36 3.77 4.16
Heating Cap.
H
kW
2.09 2.72 3.3 3.64 4.29 4.79 5.53 7.55 8.45 9.31
M 1.97 2.25 2.72 3.04 3.52 3.99 4.79 6.36 7.08 7.78
L 1.70 1.97 2.09 2.32 2.74 3.42 3.69 4.83 5.45 6.06
Cooling water flow rate
LPM 5.0 7.3 9.2 10 12.2 14.9 17.2 23.1 26 28.1
Heating water flow rate
LPM 3.0 3.9 4.7 5.2 6.1 6.9 7.9 10.8 12.1 13.3
Noise level
dB(
A)
37/34/
31
39/36/
33
41/39/
37
44/41/
38
43/39/
36
45/41/
38
46/44/
39
48/45/
42
50/47/
45
52/49/
46
Power supply 220V-50Hz
Power input
W
35 49 58 70 72 94 130 149 183 220
Running current
Amp 0.16 0.22 0.26 0.32 0.33 0.43 0.59 0.68 0.83 1.0
Water pressure drop
kPa 9.2 13.4 19.9 26.3 19.7 24 33.2 27.5 33.9 39.7
Drain pipe conn.
mm 26
Casing
dimension
L mm 580 752 952
W mm 580 752 952
H mm 275 290 290
Panel dimension mm 650*650*28 850*850*28 1050*1050*28
Water conn.
inlet Inch RC 3/4〞
outlet Inch RC 3/4〞
Note:
1. The above cooling capacity is under entering air temp 27ºC DB/19.5 ºC WB, chilled water inlet 7ºC and water
temperature difference is 5ºC
2. The above heating capacity is under entering air temp 21ºC DB and heating water inelt temp 60ºC and water
temperature difference is 10ºC
3. The above noise level is tested under back ground(<17dB(A))
4. LPM: Liter per min.,1LPM=0.06m3 /h

Correction Ratio
Correction coefficient table --cooling
dry bulb 24℃25℃
wet bulb total capacity sensible capacity total capacity sensible capacity
17℃73% 83%
18℃82% 89%
19℃
19.5℃
20℃
21℃
22℃
dry bulb 26℃27℃
wet bulb total capacity sensible capacity total capacity sensible capacity
17℃
18℃82% 95%
19℃94% 94% 94% 100%
19.5℃100% 100%
20℃106% 99%
21℃
22℃
dry bulb 28℃29℃
wet bulb total capacity sensible capacity total capacity sensible capacity
17℃
18℃
19℃
19.5℃
20℃106% 106%
21℃118% 105% 118% 111%
22℃
dry bulb 30℃
wet bulb total capacity sensible capacity
17℃
18℃
19℃
19.5℃
20℃
21℃
22℃130% 117%

Remarks：The above correction coefficient value is the corrected value for the fan coil unit capacity under different
return air temperature
Correction coefficient table-heating
dry bulb 18℃19℃20℃
heating capacity 108% 104% 100%
dry bulb 21℃22℃23℃24℃
heating capacity 97% 94% 91% 87%
Correction coefficient table-cooling under different inlet water temp
inlet water temp 5℃6℃7℃8℃
cooling capacity 118% 109% 100% 91%
inlet water temp 9℃10℃
cooling capacity 81% 70%
Correction coefficient table-heating under different inlet water temp
inlet water temp 40℃45℃50℃55℃
heating capacity 48% 62% 74% 87%
inlet water temp 60℃70℃80℃
heating capacity 100% 126% 152%
Unit Outline Dimension(mm):
KM4-02/03/04/047
air vent
mounting brackets

KM4-05/06/08
mounting brackets
air vent
KM4-10/12/14
panel
Drainge
outlet

Controller system introduction
Remote Handset Controller
LCD DISPLAY
Bettery
RESET Button
Press button to restart
remote
Clock Button
When you change the
batteries,you must reset the
clock time. After you install
the new batteries ,the clock
time will blink.Then press the
clock button ,the clock time
will not blink.Press Timer-set
button to increase the time by 1
minute step.At last press the
clock button again.
Auto
Timer-on
Fan speed
Auto Low-Med-High
Sleep
Cooling
Arrow direction is shown
from the first function
to the second function.
AM
PM
A
A
AM
PM
℃
Dehumidify Heating
Fan
Fan Button
Press button to select
low 、medium、high or Auto
speed.
ON/OFF Button
Press this button will turn the
air-conditioning unit on or off.
Note: ON/OFF button will not
work when continuous daily
operation is set.
Swing Button
Air distributor in all
mode.
MODE Button
Press button to select Auto mode
、Cool、Dehumidify、 Fan or Heat.
Sleep Button
Sleep mode will automatically
adjust temperature and save energy
when you are sleeping.
Fan speed
Reset Clock
Timer-Set
Swing
Mode
AM
PM
Time-off
Time-on Network
AM
PM
A
A
℃
Timer-off Button
Press the button once ,the
timer-off icon will blink.
Then you press TIMER button
to set timer-off time by 10
minutes step. Press the
button again, timer-off is
set. Press the button again
,timer-off mode is cancelled.
Timer-setting Button
When you set the time clock ,press
button to increase in 1 minute steps.
When you set the timer-on and
timer-off,press button to increase by 10
minutes step.
Timer-off
Clock icon
Cycle timer-on
and timer-off
Signal sending
Network
Swing
Set temperature
Timer-on Button
Press the button once ,the
timer-on icon will blink.
Then press TIMER button to
set timer-on time by 10
minutes step. Press the
button again, timer-on is set.
Press the button again
,timer-on mode is cancelled.
Network Button
Up Button
Press button to increas temperature 1℃
step.(Max:30℃)
Down button
Press button to decrease temperature 1℃
step. (min:16℃)
Transmission source used for
sending control signal to the
air-conditioning unit
LCD DISPLAY
Press Time-Set button for
3s,Cycle icon will appear.Cycle
timer-on and timer-off is on.
Then press the button for another
3s, cycle icon will disappear.
Cycle timer-on and timer-off is
off.

WALL PAD (OPTIONAL)
ENTER
AM/PM
℃
1--ON/OFF Button
Press the button, the unit will be turned on or off.
2--LED signal
3--Room temperature Sensor
4--Real time o'clock
5--Unit Number
No.00 is the master unit. You can set slave units(No.01--31)
parametres on the master wall pad.
6--Mode: Auto,Cool, Dehumidification, Ventilation and Heat
Auto mode Cool mode
Dehumidification Ventilation mode Heat mode
7--Setting Time
8--Timer ON and OFF
Cycle Timer Timer ON Timer OFF
9--Error Mark
01_ Room temperature sensor is damaged;
02_ Drainage system is damaged;
03_ Coil temperature sensor is damaged;
04_ Auto restart function is damaged.
05_ Outdoor coil temperature sensor is damaged;
06_ High or low pressure switch is opened;
08_ The unit is shortage of refrigerant.
10--Error Alarm
11--Room temperature
12--Setting temperature
13----Fan Speed Icon: Auto,Low,Medium and High
14----Sleep Mode Icon
15----Louver Swing Icon
16----Communication Icon
17----Connecttion check Icon
18----Mode Select Button
Press the button to select Auto, cool, dehumidification,
ventilation or heat mode.
19----Fan Speed Select Button
Press the button to select Auto,low,medium or high
speed.
20----Sleep Mode Button.
It will automatically adjust temperature and save
energy when you are sleeping in cool mode or heat mode.
If the wall pad is the master,press it for 3s,commumication
icon appears, you can select slave unit from 1 to 31 by pressing
Time up or down button,all parameters appear on the wall pad
will be sent to unit you selcted or all slave units when you press
Enter Button.
21----Timer ON/OFF Button
1) Press TIMER button, or appears in LCD;
2) Press TIME (up) or (down) to select TIMER ON or
TIMER OFF or SET;
3) If TIMER ON or TIMER OFF is selected. "h" and or
blink in LCD; Press the TIMER(up) or (down) to set time by 10
minutes step; Press the TIMER button to confirm it. Repeat step
2) and 3) to set TIMER OFF or ON;
4) After setting TIMER ON and OFF, Press the TIME (up)
or (down). When and SET appear in LCD, then press
TIMER button to confirm it. , and appear in LCD at
the same time. Then press ENTER button to confirm it.
5) When you cancel cycle timer on and off, press TIMER
button for 30s. disappears in LCD. When you cancel timer
on or/and off, press TIMER button first, then press the TIME
(up) or (down) to select SET only in LCD. Press the TIMER
button again, then cancel timer on or/and off.
22----Clock Button
Press it first, then press Time up or down button to set real
time o'clock
23----Enter Button
In order to avoid misoperation ,all setting(except ON/OFF
Button)is valid after pressing the button.
24----Time up/down
Press Timer ON/OFF Button or Clock Button first,then
press it to set timer time or clock time
25----Swing Button,
26----Temperature Up/Down Button
Press Up Button to increase temperature 1 ℃ step
(MAX:30℃)
Press Down Button to decrease temperature 1℃ step
(MIN:16℃)
UNIT NO.
FOR SETTING MASTER-SLAVE UNIT USING WALL PAD
1.Please see the back of wall pad. The unit No. can be set using dip switchs.
UNIT NO.
dip switches UNIT NO. UNIT NO.
h
dip switches dip switches dip switches
Remark:
1) Error mark from 01 to 04 is for water cassette fan coil unit:
2) Error mark from 01 to 08 is for DX cassette.

C O N T R O L S S P E C I F I C AT I O N
2 PIPE HOT AND CHILLED WATER CASSETTE WITH MOTORIZED VALVE
MASTER – SLAVE CONTROL (OPTIONAL)
AND COMPUTER MANAGEMENT SYSTEM CONTROL (OPTIONAL)
1.0 ABBREVIATIONS
Ts = Setting temperature
Tr = Room air temperature sensor
Ti = Indoor coil temperature sensor
Aux = Auxiliary contact
MTV = Motorized valve
1.0 SYSTEM OPERATION
2.A MASTER AND SLAVE UNIT FUNCTION
The control board can be set either as a master unit or slave unit.
2.A.1 MASTER UNIT FUNCTION
The master unit can send its parameters to the slave unit using remote handset or wired wall pad.
The master unit setting parameters are Unit ON/OFF, Mode, Fan Speed, Set Temperature, Sleep
Function and Swing function.
2.A.2 SLAVE UNIT FUNCTION
The slave unit runs according to master unit parameters.
Every unit is allowed to change to locally desired setting using remote handset or wired wall pad.
2.A.3 MASTER – SLAVE INSTALLATION
When using remote handset, for the master unit ensure the JP0 jumper is shorted and for the
slave units JP0 is opened before turning ON the main power supply.
When using wired wall pad, JP0 jumper will not function. Unit with No.00 wall pad is master unit.
Unit with No.01—31 is slave unit. See wired wall pad function guide to see how to set wall pad
Numbers.
Connect master to slave units with shiled wire. NOTE: Use 4-core cable and one to one
configuration.

When MAIN POWER SUPPLY is ON :
With motorized valve: the master unit will respond with 3 beeps.
The slave unit will respond with 1 beep.
Without motorized valve: the master unit will respond with 4 beeps.
The slave unit will respond with 2 beeps.
More than 1 master is allowed in a group. Masters can control commutatively.
2.C AIR CONDITIONER ON/OFF
There are 3 ways to turn the system on or off:
by programmable timer on the handset or wall pad controls.
by ON/OFF button on the handset or wired wall pad.
by manual control button on the air conditioner.
2.D POWER ON SETTING
When power on signal is received by the air conditioner, the Mode, Fan Speed, Set Temperature
and Swing settings will be the same as the last handset settings before the last power off.
2.E COOL MODE
If Tr >= Ts+1

C, cool operation is activated. MTV is turned on. AUX2 is closed. Indoor fan runs at
set speed.
If Tr <= Ts, cool operation is terminated. MTV is turned off. AUX2 is opened. Indoor fan runs at set
speed.
The range of Ts is 16 to 30

C
Indoor fan speed can be adjusted for low, medium, high and auto.
When turned on, MTV requires 30 seconds before it is fully open.
When turned off, MTV requires 120 seconds before it is fully closed.
When the unit is turned off, indoor fan will delay for 5 seconds before it is turned off.
2.E.1. Protection of indoor coil
If Ti < 2

C for 2 minutes, MTV is turned off. AUX2 is opened. If indoor fan is set for low speed, it
will run at medium speed. If it is set for medium or high speed, it will keep running at the same
speed.
When Ti ≥ 5

C for 2 minutes, MTV is turned on. AUX2 is closed. Indoor fan runs at set speed.
2.F FAN MODE
Indoor fan runs at the set speed while MTV is turned off. AUX1 and AUX2 are opened.
Indoor fan speed can be adjusted for low, medium, high and auto.
2.G HEAT MODE------TZ-KM-V6.2 FOR KM4 WITHOUT ELECTRICAL HEATER.

If Tr <= Ts-1, heat operation is activated, MTV is turned on. AUX1 is closed. Indoor fan runs at the set
speed.
If Tr>= Ts, heat operation is terminated, MTV is turned off. AUX1 is opened. Indoor fan repeatedly
runs at low fan speed for 30 seconds and stops for 3 minutes.
The range of Ts is 16 to 30

C
Indoor fan speed can be adjusted for low, medium, high and auto
When turned on, MTV requires 30 seconds before it is fully open.
When turned off, MTV requires 120 seconds before it is fully closed.
2.G HEAT MODE------ TZ-KM-V6.2C FOR KM4 WITH ELECTRICAL HEATER AS
BOOSTER(OPTIONAL)
If Tr <= Ts-1, heat operation is activated, MTV is turned on. Electrical heater is turned on. Indoor fan
runs at the set speed.
If Tr>= Ts, heat operation is terminated, MTV is turned off. Electrical heater is turned off. Indoor fan
runs according to POST heat condition. Indoor fan repeatedly runs at low fan speed for 30
seconds and stops for 3 minutes.
If Ti<40 C, Electrical heater is turned on. If 40=<Ti<45 C, Electrical heater is kept original state.
If Ti>=45 C, Electrical heater is turned off.
The range of Ts is 16 to 30

C
Indoor fan speed can be adjusted for low, medium, high and auto
When turned on, MTV requires 30 seconds before it is fully open.
When turned off, MTV requires 120 seconds before it is fully closed.
2.G HEAT MODE------ TZ-KM-V6.2 D FOR KM4 WITH ELECTRICAL HEATER AS PRIMARY HEAT
SOURCE. (OPTIONAL)
If Tr <= Ts-1, heat operation is activated, MTV is turned off. Electrical heater is turned on. Indoor fan
runs at the set speed.
If Tr>= Ts, heat operation is terminated, MTV is turned off. Electrical heater is turned off. Indoor fan
runs according to POST heat condition. Indoor fan repeatedly runs at low fan speed for 30
seconds and stops for 3 minutes.
The range of Ts is 16 to 30

C
Indoor fan speed can be adjusted for low, medium, high and auto
When turned on, MTV requires 30 seconds before it is fully open.
When turned off, MTV requires 120 seconds before it is fully closed.
2.G.1 Pre-Heat-------TZ-KM-V6.2 FOR KM4 WITHOUT ELECTRICAL HEATER.
If Ti <32

C, when MTV is on, indoor fan remains off and AUX1 is closed.
If 32

C <= Ti<= 38

C, when MTV is on, AUX1 is closed and indoor fan keeps original state.

If Ti >38

C, when MTV is on, AUX1 is closed and Indoor fan runs at set speed.
If indoor coil temperature sensor is damages, pre-heat time is set for 2 minutes and Indoor fan runs at
set
speed.
2.G.1 Pre-Heat-------TZ-KM-V6.2 C(D) FOR KM4 WITH ELECTRICAL HEATER.
Indoor fan will turned on after the electrical heater is turned on 30S.
2.G.2 Post-Heat -------TZ-KM-V6.2 FOR KM4 WITHOUT ELECTRICAL HEATER.
If Ti > 38

C, when MTV is off, indoor fan remains on at set speed and AUX1 is opened.
If 35

C <= Ti< =38

C, when MTV is off, AUX1 is opened. Indoor fan keeps original state.
If Ti < 35

C, when MTV is off, AUX1 is opened. Indoor fan stops.
If indoor coil temperature sensor is damages, post-heat time is set for 3 minutes with indoor fan
running at set speed.
2.G.2 Post-Heat -------TZ-KM-V6.2 C(D) FOR KM4 WITH ELECTRICAL HEATER.
Indoor fan will turned off after the unit is turned off 20S.
2.G.3 Protection of indoor coil
If Ti >= 75

C, MTV is turned off, indoor fan remains on and AUX1 is opened. Indoor fan at high
speed.
If Ti < 70

C, MTV is turned on, indoor fan remains on and AUX1 is closed. Indoor fan at set speed.
2.H DEHUMIDIFICATION MODE
If Tr>= 25C, MTV will be ON for 3 minutes and OFF for 4 minutes.
If 16 C <= Tr< 25 C, MTV will be ON for 3 minutes and OFF for 6 minutes.
If Tr <16C, MTV will be turned off.
2.I AUTO HEAT-DEHUMIDIFICATION-COOL MODE
In auto mode, the set temperature of the system is 24C and the indoor fan runs in auto fan mode.
If Tr <21C, the unit will operate in heat mode.
If Tr >25C, the unit will operate in cool mode.
If 21C≤ Tr ≤25C, the unit will operate in dehumidification mode.
Once the unit is turned on in auto mode, it will operate in that mode and will not changeover.
If the unit has been turned off for 2 hours, when turning on the unit, it will select the operating mode
depending on the room temperature.
2.J AUXILIARY CONTACTS
Cool mode (AUX2)
AUX2 is closed when MTV is on (in normal operation). AUX2 is opened when MTV is off or
protection of indoor coil is operating.
Fan mode (AUX1 and AUX2)

AUX1 and AUX2 are opened when Indoor fan is on.
Heat mode (AUX1) for unit without electrical heater.
AUX1 is closed when MTV is on (in normal operation). AUX1 is opened when MTV is off or
protection of indoor coil is operating.
2.K SLEEP FUNCTION
Sleep function can only be set in cool or heat modes.
In cool mode, after sleep function is set, the indoor fan will run at low speed and Ts will increase
2C during 2 hours.
In heat mode, after sleep function is set, the indoor fan will run at auto fan mode and Ts will
decrease 2C during 2 hours.
Changing of operation mode will cancel sleep function
The COOL mode SLEEP profile is as follow:

The HEAT mode SLEEP profile is as follows:
SLEEP set on
1/2 1 2
SLEEP set off
2
1
1/2
0
Ts-1
Ts-2
Hours since sleep set
t(hr)
Ts
Tr(℃)
2.L AUTO FAN SPEED
In cool mode, the auto fan speed will operate as the following diagram:
L
ST ST+2 ST+3 ST+5 Tr(℃）
Fan speed:
M
H
In COOL mode, the fan speed cannot change until it has run at this speed over 30 seconds.
In heat mode, the auto fan speed will operate as the following diagram:

Fan speed:
Tr(℃）
STST-2ST-3
ST-5
In HEAT mode, the fan speed cannot change until it has run at this speed over 30 seconds.
2.M SWING / LOUVER
If the indoor fan is operating, the louver will swing or can be stopped at a preferred location in any
mode.
2.N BUZZER
If a command is received by the air conditioner, the system will respond with a beep.
2.O AUTO RESTART
The system uses non-volatile memory to save the present operation parameters when system is
turned off or in case of system failure or cessation of power supply. Operation parameters are
mode, set temperature, swing, and the fan speed. When power supply resumes or the system is
switched on again, the same operations as previously set will function.
2.P MANUAL OPERATION BUTTON
On the unit front panel next to the LED lights is the reset button. Press it once and unit will
operate according to auto mode.
2.Q DRAIN PUMP
In cool and dehumidification mode :
- The drain pump will be turned on when the MTV is on, and will remain on for 5 minutes after the MTV
closed.
- The drain pump will keep running for 5 minutes after the mode is changed.
Warning ! If turn off the system by circuit breaker (or main power supply) the drain pump does
not work after turn off.
2.R FLOAT SWITCH
2.R.1 Float switch open before turning on.

When float switch(N/C) is opened before the unit is turned on. MTV is off. Drain pump and indoor fan
will operate. After float switch is closed, MTV is on.
2.R.2 Float switch is opened, when unit is on.
If the float switch is opened, the drain pump will work. When the float switch is closed, the drain
pump will run continuously for 5 minutes.
If the float switch is opened for 5 minutes continuously, MTV will be turned off. Indoor fan runs at set
speed.
If the float switch is opened for 10 minutes continuously, MTV will remain off. Indoor fan runs at set
speed. Red. yellow and green LED will blink with beeps.
2.R.3 Float switch is opened, when unit is off.
If the float switch is opened, the drain pump will work. When the float switch is closed, the drain
pump will run continuously for 5 minutes.
If the float switch is opened for 10 minutes continuously, Red.yellow and green LED will blink. The drain
pump continues to work.
3.0 LED LIGHTS
ITEM RED LED YELLOW LED GREEN LED
High speed ON
Medium speed ON
Low speed ON
Pre-heat BLINK
Post-heat BLINK
Low temperature coil protection BLINK
Over heat indoor coil protection BLINK BLINK
Coil Temperature sensor
damaged
ON BLINK BLINK
Room Temperature sensor
damaged
BLINK BLINK
Condensate pump damaged BLINK BLINK BLINK
If the sensor malfunctions, the red and yellow LED will blink with beep. Press reset button or
any of the remote handset buttons, and the beeping will stop.
If the drain pump malfunctions, the red, yellow and green LED will blink with beeping sound.
Press reset button or any of the remote handset buttons, and the beeping will stop.