Daewoo DSA-241L User manual

Service Manual
Split System
Air Conditioner
Model: DSA-241L
AUG., 2006
✔Caution
: In this Manual, some parts can be changed for improving,
their performance without notice in the parts list. So, if you
need the latest parts information, please refer to PPL(Parts
Price List) in Service Information Center.
S/MNo: DSA241L001

1
Contents
1. Features………………………………………………………………… 02
2. Specification………………………………………………………..……03
3. Dimensions…………………………………………………………..… 04
4. Refrigeration cycle diagram……………………………………………06
5. Capacitytable…………………………………………………………...07
6. Wiring diagram…………………………………………………..………08
7. Troubleshooting………………………………….………….…………..11
8. Electronic function…………………………………………………… .17
9. Characteristicof temp.sensor…………………………………………23

2
1.Features
1.1Compact design
1.2LED display

°C
°C
m
m
20
R22 / 1450
56/60
2500
800
YDK53-6D
1080X330X225
1080/1020/960/880
1200/1120/1080/1000
2µ
Welling
YDK36-4C
P14RE5245 (Interna)
Welling
16
54
150
950
≤
ø ø
10

4
3.Dimensions
3.1 Indoor unit
DSA-241L

5
3.2 Outdoor unit
DSA-241L
12.5

6
4.Refrigeration cycle diagram

5.1 DSA-241L
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 6.57 6.25 5.81 5.34 4.90 4.57
Sensitive capacity kW 4.61 4.47 4.28 4.06 3.85 3.69
21ºC D
15ºC W Input kW. 2.30 2.50 2.71 2.95 3.13 3.35
Total capacity kW 7.04 6.73 6.35 5.94 5.55 5.22
Sensitive capacity kW 4.89 4.75 4.58 4.41 4.28 4.23
24ºC D
17ºC W Input kW. 2.30 2.52 2.75 2.98 3.21 3.44
Total capacity kW 7.54 7.40 7.00 6.45 5.87 5.37
Sensitive capacity kW 5.30 5.19 5.12 4.75 4.51 4.30
27ºC D
19ºC W Input kW. 2.34 2.58 2.80 3.05 3.29 3.52
Total capacity kW 7.98 7.80 7.69 7.42 7.08 6.73
Sensitive capacity kW 5.24 5.09 5.04 4.96 4.90 4.92
32ºC D
23ºC W Input kW. 2.41 2.59 2.87 3.15 3.42 3.70
5. Capacity table
7

8
6. Schematic diagram and wiring diagram
6.1 Schematic diagram
A0 1
A1 2
A2 3
GND 4 SDA
5SCL
6WC
7VCC
8IC2 24C04
+5V C3 104
R4
10K
R3
10K
SDA
SCL
C1
104
+5V R7 12K
1
23
IC1 KIA7042
RST
BUZ1
R9
1K
+12V
BUZ
E4
10uF/16V
R17
8.1K/1%
C9
104
R11 2K
D14
IN4148
D13
IN4148
+5V
1
2
CN7
T1_room
T1_room
E5
10uF/16V
R18
8.1K/1%
C11
104
R12 2K
D16
IN4148
D15
IN4148
+5V
1
2
CN8
T2_I.pipe
T2_I.pipe
C14
102 +5V
R8 1K
REC
L1
N
IN1
1
IN2
2
IN3
3
IN4
4
IN5
5
IN6
6
IN7
7
VSS
8VDD 9
OUT7 10
OUT6 11
OUT5 12
OUT4 13
OUT3 14
OUT2 15
OUT1 16
IC7
UJN2003
ST E P_ I 2
ST E P_ I 1
ST E P_ I 3
ST E P_ I 4
+12V
C12
104
1
2
3
4
5
CN11
SWING
RY6
HEAT N
RY7
HEAT L
HEAT
N
FUSE1
3.15A/250V
LOAD_HEAT L
LOAD_HEAT N
1
CN13
HEAT_L
1
CN10
HEAT_N
ZR1
14D681K
C16
0.1uF/275VAC
1
2
CN5
TRANS_IN
SW1
t
PTC1
82RM
R6
10K C7
104
R5
10K
+5V
SW _T E ST
SEG1
SEG2
SEG3
SEG4
+12V
C2
104
Vin
1
GND
2
Vout 3
IC3 7805 +5V
E3
470uF/16V
C8
104
D7
D3
D2
D1
+12V
E2
1000uF/25V
C6
104
IN4007*8
C5
104
E1
2200uF/25V
D8
D6
D5
D4
1
2
3
4
CN1
TRANS_OUT
1
2
CN2
POWER
L
L
RY5
FAN_IN H
+12V
L1
RY4
M
L1
RY3
L
L1
In_FanM
In_FanL
In_FanLL
In_FanH
In_FanM'
In_FanL'
In_FanLL'
In_FanH'
RY1
LL
L1
In_FanM'
In_FanL'
In_FanLL'
In_FanH'
1
2
3
4
5
CN6
CON5
N
HEAT'
HEAT'
R1
10K
+5V
Model
12VAC2
12VAC1
5VAC2
5VAC1
VSS
1
VDD
2
P25
3
P26
4
P00
5
P01
6
P02
7
P03
8
P04
9
VSS1
10
P05
11
P50
12
P51
13
P52
14
P53
15
AVDD
16
AVREF
17
ANI0
18
ANI1
19
ANI2
20
ANI3
21 ANI4 22
ANI5 23
AVSS 24
P10 25
P11 26
P30 27
P31 28
P32 29
P33 30
P20 31
VDD1 32
P21 33
P22 34
P23 35
P24 36
Vpp/IC 37
XT2 38
XT1 39
RESET 40
X2 41
X1 42
IC4
IC_UPD789166(42PIN)
In_FanM
In_FanL
In_FanLL
In_FanM
In_FanL
In_FanLL
SDA
SCL
RST
BUZ
T1_room
T2_I.pipe
REC
ST E P_ I 2
ST E P_ I 1
ST E P_ I 3
ST E P_ I 4
In_FanH
HEAT
SW _T E ST
+5V
SEG1
SEG2
SEG3
SEG4
SCL
SDA
T1
T2
SW
BUZ
REC
Reset
X2
X1
SEG1
SEG2
SEG3
SEG4
+5V
+5V
Model
ST E P_ I 1
ST E P_ I 2
ST E P_ I 3
ST E P_ I 4
In_FanH
HEAT
X1R19
1M
C10
104
Model
TxD20
RxD20
R13
2K
Q1
9014
D9
IN4148
R14
2K
Q3
9014
D11
IN4148
R16
2K
Q5
9014
+12V
+12V
RXD20
TXD20
ZD1
IN4749
C15
473
E6
100uF/35V
D18 1N4007 C17
471/250v
C13
104
R24
5.1k C19
101
D17
1N4007
R27
4.7K
S
R22
3.5K/3W
R23
100K
N
R20
11K/2W
R21
11K/2W
L1
R25
330
TxD20
RxD20
+5V
IC6
PC851
IC5
PC817
R15 2k
+5
Q4
NPN R14
2k
C20
101
1
CN12
1
2
3
REC1
R19
150
C11
104
E7
47UF/16V
LED9
RUN
LED7
DEF.
LED6
AUTO
LED8
TIMER
显示 板原 理图
+5
C18
104
Dsa
1
Dsb
2
Q0 3
Q1 4
Q2 5
Q3 6
GND
7
CP
8
MR
9Q4 10
Q5 11
Q6 12
Q7 13
Vcc
14
IC8
74HC164
a
b
c
d
e
f
g h
com1 com2
DIS1
WT4021BG
R45 330
R46 330
R47 330
R48 330
R49 330
R54 330
R55 330
Q10
DTA143
Q9
DTA143
Q8
DTA143
SEG1
SEG2
+5
SEG3
REC1
+5
SEG4
SEG5
SEG5 SEG5
+5
C20
104
SEG5
REC1
J1
R2
10K
+5V
J2
EEPROM
EEPROM
J1 J2
冷暖
有掉电记忆
无掉电记忆
单冷
无
有
R59
10K
C17
101
1
2
3
4
5
6
7
8
CN9
E8
100UF/16V
R60
10K
C16
101

9
C10
104
+5V R11 12K
1
23
IC6 KIA7042
RST
CT1
0057U
D11
1N4148
R8
5.1K/1%
R10
1K/1%
R7
16K
E3
100uF/16V
D10
1N4148
R6 2K
C5
104
+5V
Current
L1
N
RL5
1
CN5
AC_N
L1
FUSE1
3.15A/250V
1
CN9
VAL VE
1
CN8
COMP
ZR1
14D681K
C3
0.1uF/275VAC
1
2
CN6
TRANS_IN
t
PTC1
82RM
C15
104
R32
10K
+5V
压力 开关
C11
104
相序 C
相序 B
T3
F_OUT2
压力 开关
相序CRX
TX
F_OUT2
RST
TX
Current
COMP
VAL VE
F_OUT1
压力开关
+5V
单相 启动
曲轴 箱
指示 灯
N
Reset
X2
X1
RX
相序A
曲轴箱
单相启动
+5V
CURRENT
相序B
COMP
VAL VE
F_OUT1
相序A
T3 X1
R12
1M
C7
104
+5V
Vin
1
GND
2
Vout 3
IC1 7805 +5V
E2
470uF/16V
C2
104
D4
D3
D2
D1 +12V
E1
1000uF/25V
C1
104
IN4007*8
1
CN4
AC_L
1
CN11
F_OUT2
1
CN10
F_OUT1
E4
10uF/16V
R5
8.1K/1%
C6
104
R9 2K
D9
IN4148
D8
IN4148
+5V
T3
1
2
3
4
CN2
T3
R4
10K RL4
+12V
L1
RL3
L1
RL2
L1
RL1
L1
5VAC1
5VAC2
1
2
3
CN1
TRANS_OUT
P23/INTP0
1
P24/INTP1
2
P25/INTP2
3
AVDD
4
P60/AN10
5
P61/AN11
6
P62/AN12
7
P63/AN13
8
AVSS
9
P50
10 IC 19
X2 20
X1 21
VSS 22
VDD 23
P10 24
P11 25
P20/ASCK20 26
P21/TxD20 27
P22/RxD20 28
P51
11
P52
12
P53
13
P00
14 P01 15
P02 16
P03 17
RESET 18
IC2 IC/UPD78F9116
LED1
R24
68K/2W
D14
4007
IC3
PC817 R22
5.1K
R19
2K
R16
10K
C8
104
+5V
相序A
相序A
R25
68K/2W
D15
4007
IC4
PC817 R23
5.1K
R20
2K
R17
10K
C9
104
+5V
相序B
相序 B
R18
10K
+5V
相序C
相序 C
1
2
3
4
CN14
1
CN15
F1
1
CN16
F2
1
CN13
曲轴箱
C4 333
R3
51/1W
1
2
CN7
1
2
CN12
IC8
PC851
IC7 PC817
RX
TX
1
CN3 S
N
J9
R27
2K
R29
5.1K
D18
1N4007
C12
104
R35
5.1K
C18
101
R31
3.5k/3W
C13
471/250V
+5V
TX
RX
N
Q5
9014
Q4
9014
Q2
9014
Q1
9014
Q3
9014
R1
2k
R2
2k
R15
2k
R14
2k
R13
2k
D5
4148
D6
4148
D7
4148
D13
4148
D12
4148
COMP
VAL VE
F_OUT1
F_OUT2
曲轴箱
Q6
9014
R30
2k
D17
4148
单相 启动
压力 开关
COMP
VAL VE
F_OUT1
F_OUT2
曲轴箱
单相启动
R39330
R28
2k
R38
330
+5
Q7
NPN
C17
101
L
L
J10

10
6.2 Wiring diagram
6.2.1 Cooling only
DSA-241L
CN2
CN9
CN1
CN10
M
~
SWING
SWING
UNIT2
CN6
CN7
CN5
Y/G
RED Y/G WHITE BLUE
FUSE 3.15A/250V
FAN1
TRANS1
CAP1
XT1
RT2
RT1
TO OUTDOOR UNIT
UNIT1
1S
WIRING DIAGRAM
(INDOOR UNIT)
XS2 XP2
CN8
CN11
AG
CN1
CN4
CN3
UNIT1
CN5
CN8
CN6
TO INDOOR UNIT POWER SUPPLY
CN10
CN11
CN2

11
7.troubleshooting
The following tables will help to find where error happened (LED on indoor unit):
For models adopting electrical function
Failure phenomenon Operation
lamp
Timer
lamp
Defrosting
lamp
Auto lamp
Over current protection of the compressor
occurs 4 times ☆☆☆☆
Indoor room temp. sensor is open circuit or
short circuit X ☆X X
Temp. sensor on indoor evaporator is open
circuit or short circuit ☆X X X
Temp. sensor on outdoor condenser is open
circuit or short circuit (without for cooling only
models)
X X ☆X
Outdoor unit protects(outdoor temp sensor,
phase order etc) X X ☆☆
EEROM error X ☆X ☆
Indoor unit communication err X X X ☆
rExtinguish ☆Flash at 5Hz
NOTE: For cool only model, the defrosting lamp is replaced with fan lamp, but malfunction display remains.

12
Currentprotection
(LED indicates)
Check the indoor
air filter.
Does outdoor heat-
exchanger fr osted?
No
It is normal under
that ambient temp .
C he ck t he
dra inage
system of
out door unit.
Yes
Does indoor heat-
exchang er frosted?
YesCheck sp eed
of indoor
motor.
Yes
No
Doe s the outdoo r
temp over 48 C?
o
Check the outdoor
condenser.
D oes it occur in
C ool mode?
Che ck speed
of outdoor
motor.
Yes
Check theover-
curren t protector of
comp ressor.
No
Replace the
main PCB board .
Re place the
compressor.
Recycle the
refrigerant
and recharge.
No
Doe s the indoor
temp low than 1 0 C?
o
Yes
No
Checkthe solenoid
coil of reverse valve.
C heckt he ov e r-
c urrent protector of
compressor.
Replace the
mainPCB board.
Recycle the refrige-
rant and recharge.
R eplace the re verse
valve.
Check the position
and wiring of tem p
sen sor (all of the m).
If wrong, the unit w ill
result in current
prote ction, not tem p.
C heck the soft
starter mould.
C h ec k t h e s o f t
starter m ou ld.
Indoor/Outdoor Units Communication Protection
Is the L&N connections between
indoor and outdoorunits correct?
Reconnectcorrectly.
Is thecommunication connection good?
Reconnect correctly.
Replace the outdor PCB, then runthe mac hine.
Is the communication protection relie ved?
It means that the malfunction is
from indoorunit. Replace the indoor PCB.
Yes
No
No
Yes
Yes

13
The unit does not
operate
Does the power LED
light af ter turning
the switch on?
C heck theelect rical
source.
No
Check the po wer
supplier.
Does the voltag e
between input
termi nat es o f
transformer i s
correct?
Does the voltag e
between outp ut
termi nat es o f
transformer i s
correct?
D oes the power
tr ansfer to the
di sp lay boa rd ?
Rep lace the ma in
PCB b oard.
Yes
Yes
No
Checkwiring.
Replace the
transformer.
No
No
Do the LED lamps
indicat es ER R?
Ye s
Per f orm
the related
inst ructions.
Yes
No
Is th ere beep from
the unit when using
remoter?
C h e c k t he s oft
starter
Check thebattery
of the remoter.
No
Check thedisplay
board .
Replace the
display boa rd.
Yes
No
Replace the
disp lay boa rd .
Yes
Ye s
Does the unit run in
Forced Co ol m ode?
Abnormalnoise
from the indoorunit
Does it happe n in
Fan Only mode?
Yes No
Does it happ en with
auto swing?
Check the
swing motor.
Yes
Check t he
swing louver.
Check the fan
motor.
No
Check the cross flow
fan .
Replace the b ear.
Does it just happen
in the beginning of
coolin g or heatin g
mode?
It is b ecaus e
of the heat
rub be tween
plastics parts.
It is n ormal.
Yes
Check the input
and output pip e.
No
R ecycle the ref rige-
r ant and recha rge.
Abnormalnoise
from the outdoor
unit
D oes it happen in
C ool mode?
Yes
Do the fan blade rub
with the shroud?
C h ec k t h e
motor.
Yes
C h ec k t h e
fan blade. C heck the fixing nuts
of outdoor unit.
No
C h ec k t h e
motor
supporter.
Check the capillary.
C h e c k t he
compressor.
No
Re cycle the refrig e-
ran t and recharg e.

14
PROBLEM CAUSE REMEDY
Power failure Check the power cord.
Wiring failure Check the wiring. Replace the terminates or wires if failure.
Transformer failure Check the input and the output on transformer. Replace if
failure.
Indoor PCB failure Replace after checked failure.
Cross flow fan failure
Replace
the
fan
if
cracked
,
out
of
balance
,
or
partially
missing
Loose screws Tighten them.
Worn bearings Replace after checked failure.
Motor failure
Replace the motor if knocking sounds continue when
running or loose, or the motor hums or noise appears to be
internal while running.
Fan blade failure Replace the fan blade if cracked, out of balance, or partially
missing.
Loose screws Tighten them.
Motor failure
Replace the motor if knocking sounds continue when
running or loose, or the motor hums or noise appears to be
internal while running.
Compressor failure Replace the compressor if sounds coming from inner of the
compressor.
Copper tubing Remove the cabinet and carefully rearrange tubing not to
contact cabinet, compressor.
Display board or indoor
PCB failure Replace the display board. If it is still false, replace the PCB.
Battery failure Check the voltage of battery. Replace batteries if the voltage
is lower than 2.3V.
Remote control failure
Normally, the remote control is not easy to damage. If the
above two methods are not effectual, replace the remote
control.
Lack of refrigerant Check leakage. Recycle the refrigerant. Correct and
recharge if there is any leakage in the refrigerant system.
Soft starter module failure Check the module and the capacitor connected to the
module. Replace if failure.
Overcurrent protector
failure
Check the resistance of compressor overcurrent protector.
Replace if failure.
Outdoor PCB failure Replace after checked failure.
Compressor
protection
Not operating
Indoor abnormal
noise.
Outdoor abnormal
noise.
Remote control
failure.

15
PROBLEM CAUSE REMEDY
Temperature
sensor
failure
Replace after checked failure.
Connector failure or loose Repair or replace the sensor.
Outdoor PCB failure Replace after checked failure.
Temperature
sensor
failure
Replace after checked failure.
Connector failure or loose Repair or replace the sensor.
Indoor PCB failure Replace after checked failure.
Soft starter module failure Check the module and the capacitor connected to the
module. Replace if failure.
Power failure Wait if checked the power voltage is really too low.
Wiring failure Correct if indoor fan motor wiring is loose.
Indoor fan motor failure Check the input of fan motor. Replace if failure.
Indoor PCB failure Replace after checked failure.
Zero
-
crossing
error
Indoor PCB failure Replace after checked failure.
Air filter Clean or replace if restricted.
Unit undersized Determine if the unit is properly sized for the area to be
cooled or heated.
Condenser
and
Evaporator
Clean or replace if restricted.
Room structure Take proper measures to make the door and windows
sealed well if gap is found.
Air flow Clean or remove if any barrier is found to block the
inlet/outlet wind flow of the unit.
Sunlight Add a awning if the outdoor unit is exposed to the sunlight.
Outdoor fan motor
Check the fan capacitor on outdoor power control board and
replace the board if not within +/-10% of manufacturer's
rating. Replace the motor if the speed is not within +/-10% of
manufacturer's rating but not because of the capacitor.
For electrical function 2.3 models. Check the fan capacitor in
indoor electric box (for some models, the capacitor is on
main PCB.) and replace the capacitor (or main PCB) if not
within +/-10% of manufacturer's rating.
Replace the motor if the speed is not within +/-10% of
manufacturer's rating but not because of the capacitor.
Less refrigerant Check the tubes for reasons of leakage. Recycle the
refrigerant, correct the leakage points and recharge.
Capillary tube
Regulate the flow if capillary tube is blocked. Make the
evaporating temperature appropriate if the evaporator is
frosted.
Compressor
The inlet and outlet valve of the compressor is damaged,
making the low pressure connected with the high pressure.
The refrigerating system is difficult to produce high pressure
and low pressure. Replace the compressor after checking for
the reason.
Heat sources Reduce if over loaded.
reverse valve
The
two
paths
for
refrigerant
are
connected
,
making
the
low
pressure connected with the high pressure. The refrigerating
system is difficult to produce high pressure and low
pressure. Replace the reverse valve after checking for the
reason
Insufficient
cooling or
heating.
indoor fan motor
Open
or
short
circuit of outdoor
temperature
sensor
Room
temp
or
evap temp sensor
open or short
circuit
Over load or too
low voltage
protection
Fan speed
beyond control

16
PROBLEM CAUSE REMEDY
LED failure Replace the display if checked failure.
Remote control shut the
display Push the button to turn the display on.
No power Check the voltage. Call an electrician if not within the limit.
Wiring Check the terminals. Repair and correct if loose.
Temperature setting Check and adjust the temperature setting.
Mode setting Check and adjust the mode setting.
Soft starter module failure Check the module and the capacitor connected to the
module. Replace if failure.
Reverse valve solenoid
coil
Check the reverse valve solenoid coil. Replace the coil if
short, open or damaged.
Reverse valve
If the reverse valve is blocked, the heating mode will not
perform. Replace the reverse valve after checking the
reason.
Water drainage failure Check the drainage pipe and repair if failure.
The indoor unit is incorrect
installed Correct the installation if not correct.
Drainage pipe blocked Correct it.
The humidity in room is
too high It's normal if the humidity in the room is over 85%.
Wiring failure Check wiring. Correct if wrong wiring or loosen.
Wire EMC Check wiring. Correct if the commucication wire is not
shielded wire or twisted with other wires.
Zero
-
crossing
error
Outdoor PCB failure Replace if the LED is not on.
Outdoor
transformer
failure
Replace if failure.
Indoor PCB failure Replace the PCB if the photon coupling on indoor PCB is
failure.
Indoor PCB failure Replace after checked failure.
No cooling or
heating.
Water drops from
indoor unit
Insufficient
cooling or heating.
No display on
indoor unit.

17
8. Electronic Control Principle of Large Cooling Capacity Split Model A/C
8.1 Fan only mode
Fan speed is high/mid/low/ Auto
8.2 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
T: Room temp.
Ts: Setting temp.
Condition Compressor Outdoor fan
T> Ts+1 On OnTemp. up
T<Ts+1 Off Off
T> Ts On OnTem p . d ow n
T<Ts Off Off
Auto fan
Condition(T=Indoor Temp.-Setting Temp.) Indoor fan speed
T<1℃Low
1<T<℃4℃Med.
Temp. up
T>5℃High
T> 4℃High
1<T<℃4℃Med.
Tem p . d ow n
T<1℃Low
Anti-freezing control to indoor evaporator
Condition
Temp. Time
Compressor Outdoor fan
T> TE6 On OnTemp. up
T< TE6 >4 Minutes Off Off
T> TE5 On OnTem p . d ow n
T< TE5 >4 Minutes Off Off
Condenser high temp. protection( only for heat pump)
Temp. Condition Compressor
T> TE10 OffTemp. up
T< TE10 On
T> TE11 OffTem p . d ow n
T< TE11 On
The outdoor fan motor speed control in the cooling mode.
8.3 Dehumidifying mode
8.3.1 Indoor fan speed at low speed.
8.3.2 Protection is same as cooling mode.
8.4 Heating mode
32
30
High speed
Low speed
T3

18
8.4.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode.
8.4.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode, except
for the defrosting mode or the end of defrost.
8.4.3 Action conditions of compressor at heating mode: compressor must run for 4 minutes after starting
and then judge temperature. Meanwhile other protections are still valid.
Condition Compressor Outdoor fan
T> Ts+4 Off OffRoom temp. up
T<Ts+4 On On
T< Ts+3 On OnRoom temp. down
T>Ts+3 Off Off
8.4.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller,
Anti-cold wind function 1.
Condition
T= Indoor exchanger temp.
Indoor fan speed
T<TE1 Off
TE1<T<TE2 Low speed
Indoor exchanger temp. up
T>TE2 Setting fan speed
T>TE3 Setting fan speed
TE4<T<TE3 Low speed
Indoor exchanger temp. down
T>TE4 Off
Anti- cold air protection 2 ( when the room temp. satisfy the setting temp.)
T=evaporator pipe sensor temp. Indoor fan speed
T<TE14+2℃Low speed or stopRoom temp. up
T> TE14+2℃Setting speed.
T> TE14 Setting speed.Room temp. down
T< TE14 Stop after 15 seconds Low speed
Auto wind
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<2℃Med. speedRoom temp. up
T>2℃Low speed.
T> 0℃Low speed.Room temp. down
T<0℃Med. speed
Indoor evaporator high-temperature protection
Condition
T= Indoor exchanger temp.
Compressor Outdoor fan
T<TE15=54℃On On(high speed)
TE15<T<TE8 On On(low speed)
TE8<T<TE7 On Off
Indoor exchanger temp. up
T>TE7 Off Off
T>TE9 Off OffIndoor exchanger temp. down
T<TE9 On On
8.5 Defrosting mode
8.5.1 Conditions of defrost:
Defrosting starts when either of the following :
T3 lower than 0°c, lasts for more than 40 minutes, provided that the time period when the temperature
is lower than -3°c consecutively reaches 3 minutes.
Calculate from the end of latest defrost, evaporator high temp. protection only closes outdoor fan with

19
the compressor still running. Add up to 90 minutes
.
8.5.2 Conditions of defrost ending:
Defrosting ends when either of the following :
The time gets to 10 minutes;
T3>20°c