Friedrich MW09C1H Air Conditioner User Manual

Service and Parts Manual
2 0 11
SPLIT TYPE ROOM AIR CONDITIONER
WALL MOUNTED TYPE
Models
Indoor Unit
MW09C1H
MW12C1H
Outdoor Unit
MR09C1H
MR12C1H
Table of Contents
Model and product code .................................................................................................. 3
Summary and features ......................................................................................................... 4
1. Safety Precautions ............................................................................................................... 5-7
2. Specifications ........................................................................................................................... 8
2.1 Unit Specifications........................................................................................................... 8-11
2.2 Operation Date ............................................................................................................... 12
2.3Expanded capacity data tables for both cooling and heating ..................................... 13
2.4 Operation
n Characteristic Curve ...................................................................................... 14
2.5 Noise criteria curve tables for both models.................................................................... 15
3. Construction Views ..............................................................................................................
16
3.1 Indoor Unit ....................................................................................................................... 16
3.2 Outdoor Unit .................................................................................................................... 16
4. Refrigerant System Diagram ....................................................................................... 17
5. Schematic Diagram ..............................................................................................................
18-21
5.1 Electrical Date ................................................................................................................. 18
5.2 Electrical Wiring ........................................................................................................... 18-19
5.3 Printed Circuit Board ..................................................................................................... 20-21
6. Function and Control ....................................................................................................... 22-35
7. Installation Manual ............................................................................................................ 36-43
8. Troubleshooting
................................................................................................................... 44-72
9.1 Precautions before Performing Inspection or Repair .................................................... 44
9.2 Confirmation ................................................................................................................. 44
9.3 Judgement by Flashing LED of Indoor/Outdoor Unit ........................................................... 44-51
9.4 How to Check simply the main part .................................................................................... 52-62
9. Removal Procedure
....................................................................................................... 73-78
10. Exploded Views and Parts List
2
............................................................................. 79-85
Model and product code
Model and product code
Voltage range
Complete unit model
Indoor unit model
Outdoor unit model
115V ~ 60H zM
M09CIH
MW09CIH
MR09CIH
115V ~ 60H zM
M12CH
MW12CIH
MR12CIH
3
Summary and features
Summary and features
OutdoorUnit
MR09CI H
MR012CIH
Remote control windo w
YB1FAF
4
IMPORTANT SAFETY INFORMATION
T h e i n f o r m a t i o n c o n t a i n e d i n t h i s m a n u a l i s i nt e n d e d f o r u s e by a q u a l i f i e d s e r v i c e
technician who is familiar with the safety procedures required for installation and repair, and
who is equipped with the proper tools and test instruments required to ser vice this product.
Installation or repairs made by unqualified persons can result in subjecting the unqualified person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on your appliance. Always read, understand and obey
all safety messages.
This is a safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING” or “CAUTION”.
These words mean:
WARNING
You can be killed or seriously injured if you do not follow instructions.
CAUTION
You can receive minor or moderate injury if you do not follow instructions.
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury, and tell you what will
happen if the instructions are not followed.
NOTICE
A message to alert you of potential property damage will have the word “NOTICE”.
Potential property damage can occur if instructions are not followed.
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
•
Unplug and/or disconnect all electrical power to the unit before performing inspections, maintenance,
or service.
•
Make sure to follow proper lockout/tag out procedures.
•
Always work in the company of a qualified assistant if possible.
•
Capacitors, even when disconnected from the electrical power source, retain an electrical charge
potential capable of causing electric shock or electrocution.
•
Handle, discharge, and test capacitors according to safe, established, standards, and approved
procedures.
•
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary
to test or troubleshoot equipment with the power on to the unit.
5
•
Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel,
and sleeve on the room side of the air conditioning unit while cleaning.
•
Electrical component malfunction caused by water could result in electric shock or other electrically
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
•
Never operate the A/C unit with wet hands.
•
Use air conditioner on a single dedicated circuit within the specified amperage rating.
•
Use on a properly grounded outlet only.
•
Do not remove ground prong of plug.
•
Do not cut or modify the power supply cord.
•
Do not use extension cords with the unit.
•
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves,
goggles, clothing, adequately insulated tools, and testing equipment etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
REFRIGERATION SYSTEM REPAIR HAZARDS:
•
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before
opening system for repair.
•
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor
to moderate injury.
•
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s flame or hot
surfaces can cause serious burns.
•
Make sure to protect personal and surrounding property with fire proof materials.
•
Have a fire extinguisher at hand while using a torch.
•
Provide adequate ventilation to vent off toxic fumes, and work with a qualified assistant whenever
possible.
•
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for
leaks, flushing etc.
•
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves,
safety glasses, clothing etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
MECHANICAL HAZARDS:
6
•
Extreme care, proper judgment and all safety procedures must be followed when testing,
troubleshooting, handling, or working around unit with moving and/or rotating parts.
•
Be careful when, handling and working around exposed edges and corners of the sleeve, chassis,
and other unit components especially the sharp fins of the indoor and outdoor coils.
•
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.
•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.
PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
•
Read the Installation/Operation Manual for the air conditioning unit prior to operating.
•
Use air conditioner on a single dedicated circuit within the specified amperage rating.
•
Connect to a properly grounded outlet only.
•
Do not remove ground prong of plug.
•
Do not cut or modify the power supply cord.
•
Do not use extension cords with the unit.
•
Be extremely careful when using acetylene torch and protect surrounding property.
•
Failure to follow these instructions can result in fire and minor to serious property damage.
WATER DAMAGE HAZARDS:
•
Improper installation, maintenance or servicing of the air conditioner unit can result in water damage
to personal items or property.
•
Insure that the unit has a sufficient pitch to the outside to allow water to drain from the unit.
•
Do not drill holes in the bottom of the drain pan or the underside of the unit.
•
Failure to follow these instructions can result in damage to the unit and/or minor to serious property
damage.
7
2.
1 Unit Specifications
Specifications
09
Kof115
VMo
del
s
Model
Function
Rated Voltage
Frequency
(Inverter different Compressor
speed)
Total Capacity
(Inverter different Compressor
speed)
Power Input
(Inverter different Compressor
speed)
Rated Input
Rated Current
Air Flow Volume
Indoor MW09CI
H
Outdoor
Unit MR09C1H
MW09CIH
High
Standard
Low
High
Standard
Low
High
Standard
Low
High
Standard
High
Standard
Turbo
SH
Hz
Hz
Hz
W / Btu/h
W / Btu/h
W / Btu/h
W
W
W
W
W
A
A
H
M
CFM
L
Dehumidifying Volume
STD
Indoor unit
Fan Motor
Speed
Turbo
SH
H
M
L
Output
Capacitor
RLA
Type
Diameter-Length
Fan
CFM
CFM
CFM
pints/hour
W /W
in.
in.
in.
25.4 X 1 X 10.5
r/ m i n
r/ m i n
r/ m i n
r/ m i n
W
F
A
in.
width (L)
Model
Output
Swing
Motor
Fuse (A)
Sound Pressure Level
Sound Power Level
Net Weight /Gross Weight
H
M
L
H
M
L
294
253
218
1.69
14.0
22
MW09CIH
1260
1050
920
730
20
4 .0
0.38
Cross flow fan
3.62 X 25.4
Aluminum fin-copper tube
216
0.019 - 0.055
Evaporator
Pipe Diameter
Row-Fin Gap
COOLING
115V~
70
41
15
3100/10600
2650/9000
1300/4435
1050
640
180
1050
640
16.8
7.0
330
in.
MP24AA
2 .4
PCB 3.15A
34
30
26
44
40
36
33 1/4
X 10 7/8 X 7 1/8
33.3X10.8X11
in.
lbs
36X10X14
22
16X24.3X130.9
W
A
dB (A)
dB (A)
dB (A)
dB (A)
dB (A)
dB (A)
Remar
k:
s
Rating conditions are:
Cooling: Indoor air temperature 80¡F D.B. / 67¡F W.B.
Outdoor air temperature 95.0¡F D.B. / 75¡F W.B.
Heating: Indoor air temperature 70¡F D.B./ 60¡F W.B.
Outdoor air temperature 47¡F D.B. / 43¡F W.B.
8
Specifications
12K of 115V Models
Model
Function
Rated Voltage
Frequency
(Inverter different Compressor
speed)
Total Capacity
(Inverter different Compressor
speed)
Power Input
(Inverter different Compressor
speed)
Rated Input
Rated Current
Air Flow Volume
Outdoor Unit
MR12CH - SYSTEM
MW12CIH
High
Standard
Low
High
Standard
Low
High
Standard
Low
High
Standard
High
Standard
Turbo
SH
H
M
L
Dehumidifying Volume
EER / C.O.P
SEER/HSPF
Indoor unit
Fan Motor
Speed
Turbo
SH
H
M
L
Output
Capacitor
RLA
Type
Diameter-Length
Fan
Hz
Hz
Hz
W / Btu/h
W / Btu/h
W / Btu/h
W
W
W
W
W
A
A
CFM
CFM
CFM
CFM
pints/hour
W /W
r/m i n
r/m i n
r/m i n
r/m i n
W
F
A
in.
Evaporator
Pipe Diameter
Row-Fin Gap
Sound Power Level
253
218
2.54
12.00
.
22
1260
1050
920
730
20
1.0
0.2
Cross flow fan
3.62X25.4
Aluminum fin-copper tube
.276
.077-.055
in.
H
M
L
H
M
L
25.4X1X10.5
MP24AA
2.4
PCB 3.15A
34
30
26
44
40
36
W
A
dB (A)
dB (A)
dB (A)
dB (A)
dB (A)
dB (A)
in.
Net Weight /Gross Weight
277
in.
in.
width (L)
Model
Output
Swing
Motor
Fuse (A)
Sound Pressure Level
COOLING
208-230V~
115
70
41
15
4100/14000
3520/12000
1320/4500
1050
640
180
1050
640
6.5
3.2
300
in.
lbs
33 1/433.3X10.3X7.1
X 10 7/8 X 7 1/8
36X10X14
22
.26.3/30.9
Remarks
Rating conditions are:
Cooling: Indoor air temperature 26.7¡C D.B. / 19.4¡C W.B.
Outdoor air temperature 35.0¡C D.B. / 23.9¡C W.B.
Heating: Indoor air temperature 21.1¡C D.B./ 15.6¡C W.B.
Outdoor air temperature 8.33¡C D.B. / 6.11¡C W.B.
9
Specifications
Outdoor Unit
MR09C1H
Manufacturer/trademark
SANYO
Model
C-6RZ110H1A
Type
Twin rotory
Compressor L.R.A. (A)
A
33
RLA(A)
A
4.59
Power Input(W)
W
800
Overload Protector
Int11l-3979
Electronic Expansion Valve
throttling
Transducer starting
Throttling Method
Starting Method
Working Temp Range
Heat
Exchanger
Coil
F
Coil
Aluminum fin-copper tube
Pipe Diameter
mm
.275
Rows-Fin Gap
in.
2 - .005
Coil length (l) x height (H) x coil width (L)
Speed
Fan Motor
23.94 X 20 X 1.73
rpm
900/650
Output of Fan Motor
W
40
RL A
A
0.17
Capacitor
Air Flow Volume of Outdoor Unit
Fan
41 - 115
μF
/
CFM
1118
Type-Piece
Diameter
Axial fan - 1
in.
Defrosting Method
Climate Type
15.7
/
T1
Isolation
I
Moisture Protection
Permissible Excessive Operating
Pressure for the Discharge Side
Permissible Excessive Operating
Pressure for the Suction Side
Sound Pressure Level
Sound Power Level
IP24
PSI
552
PSI
175
dB (A)
53
dB (A)
Dimension (W×H×D)
in.
63
12.6
33 33.4
3/8 XX23
1/2XX21.3
12 1/2
Dimension of Package (L×W×H)
in.
34.6 X 14.2 X 22.3
Net Weight /Gross Weight
lbs
79.4/90.4
R410A
lbs
2.65
.
ft
25
.33
Refrigerant
Name of refrigerant
Weight
Factory Prescharge
Connection Gas additional charge
Pipe
Liquid Pipe Diameter
Gas Pipe Diameter
02/H
mm
Φ6(1/4”)
mm
Φ9(3/8”)
Max. Interunit Height Difference
ft
33
Max. Interunit Piping Length
ft
66
The above data is subject to change without notice. Please refer to the nameplate of the unit.
10
Specifications
Outdoor Unit
MR12C1H
Manufacturer/trademark
SANYO
Model
C-6RZ110H1A
Type
Twin rotory
Compressor L.R.A. (A)
A
33
RLA(A)
A
4.59
Power Input(W)
W
Overload Protector
Throttling Method
Starting Method
Working Temp Range
Heat
Exchanger
Coil
41 - 115
Aluminum fin-copper tube
Pipe Diameter
mm
Rows-Fin Gap
in.
2 - .005
mm
747X508X44
rpm
900/680
Speed
.275
Output of Fan Motor
W
40
RL A
A
0.17
μF
/
Capacitor
Air Flow Volume of Outdoor Unit
Fan
F
Coil
Coil length (l) x height (H) x coil width (L)
Fan Motor
800
Int11l-3979
Electronic Expansion Valve
throttling
Transducer starting
CFM
Type-Piece
Diameter
1118
Axial fan
in.
Defrosting Method
Climate Type
15.7
/
T1
Isolation
I
Moisture Protection
Permissible Excessive Operating
Pressure for the Discharge Side
Permissible Excessive Operating
Pressure for the Suction Side
Sound Pressure Level
Sound Power Level
dB (A)
IP24
PSI
552
PSI
175
dB (A)
55
65
33 3/8
X 23
1/2 XX12
1/2
33.4
X 12.6
21.3
Dimension (W×H×D)
in.
Dimension of Package (L×W×H)
in.
34.6 X 14.2 X 22.3
Net Weight /Gross Weight
lbs
79.4/90.4
R410A
Weight
lbs
2.65
.
Factory Prescharge
Connection Gas additional charge
Pipe
Liquid Pipe Diameter
ft
H
25
1/4 oz per ft
Refrigerant
Name of refrigerant
Gas Pipe Diameter
mm
Φ6(1/4”)
mm
Φ9(3/8”)
Max. Interunit Height Difference
ft
33
Max. Interunit Piping Length
ft
66
The above data is subject to change without notice. Please refer to the nameplate of the unit.
11
Specifications
Appending date
Table showing operation frequency limits for cooling and heating
Outdoor Relative Humidity 40%
Outdoor Relative Humidity 72%
140
130
120
Indoor Wet Bulb
Temperature( )
59°F
68°F
110
77°F
100
80
60
40
Capacity Change Ratio (%)
Capacity Change Ratio (%)
140
130
120
59°F
60.8°F
Indoor Wet Bulb
Temperature( )
110
62.6°F
100
80
60
40
20
20
15
35
55
75
95
Compressor Frequency(Hz)
15
35
55
75
95
Compressor Frequency(Hz)
Performance date for both cooling and heating
COOLING:
Temperature Condition
(°F)
Indoor
Outdoor
80.06/66.92
80/67
95/–
Model
name
Standard
pressure
P (MPa)
09K
0.8 to 1.1
12K
0 .8 to 1 .0
Heat exchanger pipe
temp.
EVP (°F)C
OD(°F)
53 to 57
50 to 54
105 to 104
109 to 113
Outdoor fan Compressor
revolution
Indoor fan mode
(rps)
mode
Turbo
Turbo
High
Rated
High
Rated
HEATING:
Temperature Condition
(°F)
Indoor
Outdoor
67/60
47/43
46.99/42.99
66.98/60.08
Model
name
Standard
pressure
P (MPa)
09K
2.8 to 3.2
12K
2.8 to 3.2
Heat exchanger pipe
temp.
EVP (°F)
99 to 100
108 to 111
COD(°C)
2 to 4
0 to 3
Compressor
Indoor fan Outdoor fan revolution
mode
(rps)
mode
Turbo
Turbo
High
Rated
High
Rated
NOTES :
(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path
U bent. (Thermistor themometer)
(2) Connecting piping condition : 7.6 m
12
Specifications
Expanded c apacity data tables for both cooling and heating
Cooling
Capacity Ratio (%)
110
• Conditions
DB80°F/WB67°F
Indoor: DB80.06˚F/WB66.92˚F
Indoor air flow : TURBO
Pipe length : 7.6m
100
90
80
115
113
111
108
106
104
102
100
99
97
95
93
91
90
70
Outdoor temp. (˚F)
Capacity Variation Ratio According to Pipe Length
110
110
• Conditions
• Conditions
Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F
105
Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F
105
Indoor air flow: TURBO
Indoor air flow: TURBO
100
100
95
95
Standard pipe length 7.6m
90
90
85
85
Maximum Elevation 7.6m
Maximum pipe length 20m
80
05
10
15
20
Total pipe length (m)
25
30
80
01
.5
3.04
.5
6.07
.5
9.0
Total Elevation (m)
13
Specifications
Operation C haracteristic Curve
Cooling
• Conditions
25.0
22.5
Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F
Indoor air flow : TURBO
Pipe lengt: 7.6m
20.0
Current (A)
9 btu unit
17.5
15.0
12.5
10.0
7.5
115V
5.0
2.5
0
01
02
03
04
05
06
07
80
09
0
Compressor speed (rps)
1 2 K o12
f 11
5 Vunit
U n i ts
btu
Cooling
25.0
22.5
Current (A)
20.0
• Conditions
:
Indoor: DB80°F/WB67°F
Outdoor: DB95°F/WB75°F
Indoor air flow : TURBO
Pipe length: 7.6m
17.5
15.0
12.5
10.0
115V
7.5
5.0
2.5
0
01
02
03
04
05
06
07
Compressor speed (rps)
14
09
80
0
Specifications
2.5 Noise criteria curve tables for both models
0099 Kbtu
U nunits
i ts
70
Indoor side noise when blowing
Outdoor side noise
40
60
Noise/dB(A)
Noise/dB(A)
35
30
25
50
40
30
Low
MiddleH
igh
Turbo
20
0
Indoor fan motor rotating speed
20
40
60
80
100
Compressor frequency/Hz
112
2 Kbtu
U n iunit
ts
70
Indoor side noise when blowing
Outdoor side noise
40
60
Noise/dB(A)
Noise/dB(A)
35
30
25
50
40
30
20
Low
MiddleH
igh
Indoor fan motor rotating speed
Turbo
20
0
20
40
60
80
100
Compressor frequency/Hz
15
Constrction views
3. Construction Views
3.1 Indoor Unit
H
W
D
5
1 31/4
5
21
542
61 6
3/4
9
Unit:m m
3.2 Outdoor Unit
W2
D4
H2
W3
D2
W4
D3
Indoor Unit (mm)
System
Model
Number
09K
0 9K
12K
1 2K
16
Outdoor Unit (mm)
Cabinet
Cabinet
Additional Dimensions
W
H
D
W2
H2
D4
D2
W3
D3
W4
33 1/4
10 7/8
7 1/8
30 3/4
23 1/2
10 7/8
12 1/2
33 3/8
11
21 1/2
Refrigerant System Diagram
4. Refrigerant System Diagram
Cooling Models
INDOOR UNIT
OUTDOOR UNIT
GAS SIDE
3-WAY VALVE
Muffler
Discharge
HEAT
EXCHANGE
(EVAPORATOR)
Suction
Accumlator
COMPRESSOR
HEAT
EXCHANGE
(CONDENSER)
LIQUID SIDE
2-WAY VALVE
Strainer
Electric Expansion
Valve
Strainer
COOLING
17
Schematic Diagram
5. Schematic Diagram
5.1 Electrical Date
Indoor Unit
Symbol
Color symbol
Symbol
WHITE
WH
Color symbol
BROWN
BN
YE
YELLOW
BU
BLUE
RD
RED
BK
BLACK
YELLOW GREEN
YEGN
PROTECTIVE EARTH
Outdoor Unit
Symbol
Parts name
L1
REACROR
PCB1~PCB2
S10/S11S40/S70/S80/S90
Symbol
Color symbol
WH
WHITE
PRINTED CIRCUIT BOARD
YE
YELLOW
CONNECTOR
RD
RED
SAT
OVERLOAD
BN
SAT OVERLOAD BN BROWN
COMP
COMPRESSOR
BU
BLUE
PROTECTIVE EARTH
BK
BLACK
YELLOW GREEN
YEGN
5.2 Electrical wiring
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
Indoor Unit
ROOM
TEM.SENSOR
DISPLAY
TUBE
TEM.SENSOR
AP1
CN1 CN2
0
0
RT1
RT2
13
XT1
ROOM
DISP-1
TUBE
DISP-2
W4 BU
L1
COM-OUT
N(1)
W5 BK
W3 BN
L1
CAP
AC-L
AP2
PG
PGF
SWING-UD
FAN MOTOR
18
EVAPORATOR
ELECTRIC BOX
G
G
TC
II
SWING MOTOR(U.D)
W1 YEGN
TR_IN
TR_OUT
M2
M1
3
W2 YEGN
L-OUT
K4
JUMP
2
OUTDOOR UNIT
N
I
TRANSFORMER
21
Schematic Diagram
Outdoor Unit
Cooling Models of 115V
COMP
CT1,2
W10 RD
W3YEGN
R COMP E
TUBE
OUTROOM EXHUAST
TEM.SENSOR TEM.SENSOR TEM.SENSOR
RT3
0
RT4
0
RT5
0
S
I
N
D
O
O
R
W4 BK
W14 BN
L1 W1 BN
L
U
N
I
T
W
W15 BU
N(1)
2
3
V
G
OUTROOM EXHAUST
OVERHEAT OUTTUBE
E
G
XT2
W8 YEGN
L2
L2
L2
W5 BU W6 YE W7 BK
U
G
C
L1 W2 BU
N
FILTER
1 3
2 4
E
AP1
L4 W17 RD
AC-L1
L4 W16 WH
AC-N1
W13 YEGN
POWER
N
L
COMU
AC-N3AC-N4 AC-L3 AC-L2
CN1
OFAN
EKV
M
AC-N5 AC-L2 AC-L4
W18 YEGN
W20 BU W23 OG W21 BN
G
G
W19 BU
W24 RD
C4
C3
1
2
2
1
W22 WH
FAN MOTOR
G
19
Schematic Diagram
5.3 Printed Circuit Board
TOP VIEW
4
1
2
3
5
6
7
1
Interface of neutral wire
2
Transformer input
3
Interface of PG motor
4
Auto button
5
Feedback from PG motor
6
Up&Down swing
7
Jumper cap
8
Indoor temperature sensor
9
Pipe temperature sensor
10
DISP-1, DISP-2 display interface
11
Protective tube
12
Communication interface
12
8
11
9
10
BOTTOM VIEW
20
Schematic Diagram
TOP VIEW
Terminal of
jump wire,
live wire and
neutral wire,
AC-N4 joint
AC-N3,
External connect highAC-L2 joint capacity positive terminal
External connect highAC-L3
capacity negative
Protective
tube
terminal
Slug of on-off
power
High frequency
transformer
Stabilized voltage
block 7805
IPM module
Neutral wire terminal
of 4-way valve
Live wire terminal of 4-way
valve
Terminal of jumper
wire, neutral wire
Main relay
Terminal of DC fan
Terminal of
compressor
overload
protector
Discharge
terminal of
compressor
Terminal of
outdoor pipe
temperature
Outdoor
ambient
temperature
sensor
Protective
tube
Terminal of power
lead-in wire and
live wire
Terminal of
ground wire
Terminal of
Terminal of
power lead-in communication wire
wire and
neutral wire
BOTTOM VIEW
21
Function and Control
6. Function and Control
6.1 Remote Control Operations
1
2
START / STOP
P res
to s tart or s top operation.
s ON/OFF
Press it to start or stop operation
: P ress to decrease temperature
setting.
MODE
3
: P res
s to itincreas
e temperature
Press
to select
operation mode
setting.
(AUTO/COOL/DRY/FAN/HEAT)
4
AUTO
FAN +
: Press it to increase temperature
P res s to s et fan s peed.
setting
5
MODE
: Press it to decrease temperature
P res s to s elect operation mode
setting
(AUTO/COOL/DRY/FAN/HEAT).
2
1 1
2
3
10
10
12
13
8
14
9
9
12
13
15
TIMER
TIMER
ON ON
Press itPress
to set itauto-on
timer. timer
to set auto-on
7
11
11
CLOCK
6
8
7
7
Press itPress
set clock.
it to set swing angle
5
56
9
FAN
SENSOR
Press it to set fan speed
3
4
4
6
AIR
SWEEP
TIMER OFF
Press it set swing angle.
Press it to set auto-off timer
8
10
14
11
12
13
14
EXTEND
CLOCK
TEMPPress it to set clock
X-FAN (page 31) ?
TIMER OFF
itTEMP
Press
to set auto-off
timer
(page
31) ?
TURBO
TURBO(page 32)
?
SLEEP(page 32)
SLEEP
?
Note:
Onlyname
namedifferent
different between
Note:
Only
betweenX-FAN
X-Fanand BLOW,
15
butbut
thethe
function
is theissame.
and Blow,
function
the same.
17
LIGHT
LIGHT
PressPress
it to turn
light.
it toon/off
turn the
on/off
the light.
*Remote control works with cool and Heat Pump Models
22
Function and Control
1 ON/OFF :
Press this button to start the unit operation .Press this button again to stop the unit operation.
2 MODE :
Each time you press this button,a mode is selected in a sequence that goes from AUTO,
COOL,DRY, FAN,and HEAT * , as the following:
FAN
HEAT *
COOL
AUTO
DRY
*Note:Only for models with heating function.
After energization, AUTO mode is defaulted. In AUTO mode, the set temperature will not
be displayed on the LCD, and the unit will automatically select the suitable operation
mode in accordance with the room temperature to make indoor room comfortable.
3 + :
Press this button to increase set temperature.Holding down button above 2 seconds rapidly
increases set temperature. In AUTO mode, set temperature is not adjustable.
4
Press this button to decrease set temperature.Holding
down button above 2 seconds rapidly
.
decreases set temperature. In AUTO mode, set temperature is not adjustable.
5 FAN :
Every press of FAN button changes the fan speed in the following order:
Auto
Low speed
6
Medium speed
High speed
:
Every pressof the button changes the swing angle in the follow order:
OFF
This remote controller is universal . If any command
the unit will carry out the command as
,
or
is sent out,
indicates the guide louver swings as:
23
Function and Control
:
7 TIMER ON
Press TIMER ON button, "ON" blinks and
disappears. Within 5 seconds, every press of + or button increases or decreases the ON time setting by 1 minutes. Holding down either buton
above 2.5 seconds rapidly changes the time setting by 1 minute and then by 10 minutes.
Within 5 seconds after setting, press TIMER ON to confirm. To cancel the TIMER ON
operation, press TIMER ON button.
8 TIMER OFF :
Press TIMER OFF button to set TIMER OFF. The setting method is the same as TIMER
ON.
9 CLOCK :
Press CLOCK button, the icon
blinks. During 5 seconds blinking, pressing + or - button adjusts
preset time. Holding down either button above 2 seconds increases or decreases the time by
1 minute every 0.5 second. If you are still pressing the button after 10 minutes increased or
decreased, the time will be changed by 10 minutes every 0.5 second. During blinking, press
the CLOCK button again, the icon
will be constantly displayed and it indicates that setting
has been finished.
10
X-FAN:
Pressing X-FAN button in COOL or DRY mode,the icon
is displayed and the indoor
fan will continue operation for 10 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.
11
TEMP:
Press TEMP button,
(set temperature),
(indoor ambient temperature) and
(outdoor ambient temperatur) is displayed circularly. Not displaying icon is defaulted.
During operation of TEMP button, the set temperature is always displayed.
Note: Outdoor ambient temperature is only displayed for some models.
24
Function and Control
12
TURBO:
Press this button in COOL or HEAT mode turns on/off Turbo function. After TURBO
function is set, its icon is displayed. When switching operation mode or changing
fan speed, this function will be canceled automatically.
at super high fan speed. (This function is not applicable for some models).
13
SLEEP:
Press SLEEP button into SLEEP operation. Press SLEEP button again to cancel SLEEP.
This function only can be used in COOL, HEAT (applicable to heat pump unit) or DRY
mode, to maintain the most comfortable temperature for you.
14
LIGHT:
Press LIGHT button turns on/off the display's light. If the light is tunrned on ,
displayed. If the light is tunrned off
is
disappears.
3 and 4 About lock
Press "+ " and "-" buttons simultaneously to lock or unlock the keypad. If the remote
controller is locked,
is displayed. In this case, pressing any button,
blinks
three times.
2 and 4
About switch between fahrenheit and cenrigrade
At unit OFF, press "MODE " and" - " buttons simultaneously to switch between ć and ̧ .
25
Function and Control
Replacement of Batteries
1.Remove the battery cover plate from the rear of the remote controller.
(As shown in the figure)
2.Take out the old batteries.
3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.
4. Replace the battery cover plate.
ƾ Notes:
● When changing the batteries, do not use old or different batteries,
otherwise, it may cause malfunction of the wireless remote control.
● If the wireless remote controller will not be used for a long time, please
remove batteries to prevent damage from leaking batteries.
● The operation should be performed in its receiving range.
● It should be kept 1m away from the TV set or stereo sound sets.
● If the wireless remote controller does not operate normally, please take
the batteries out and replace them after 30 s. If still not operating properly,
replace the batteries.
Sketch map for
replacing batteries
Emergency Operation
When the wireless remote controller is lost
o r damaged, please use the manual switch
on the main unit. Operation will be in AUTO
mode and the temperature setting or fan
speed can not be changed .
The manual switch can be operated as follow:
Manual switch
ƽ To operate: Pressing the AUTO/STOP button,
the unit enters into AUTO mode.
The microcomputer will monitor the room
temperature to select the (COOL, HEAT, FAN)
mode automatically,to abtain the comfortable
effect.
ƽ To turn off: Press the AUTO/STOP button to
switch the unit off.
26
Fig.3
Function and Control
6.2 Description of Each Control Operation
1. Temperature Parameters
Indoor preset temperature (Tpreset )
Indoor ambient temperature (Tamb.)
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1) Cooling Mode
Working conditions and process of cooling
When Tamb.≥ Tpreset, the unit will enter cooling operation, in which case the indoor fan, the outdoor fan and the compressor
will work and the indoor fan will run at preset speed.
When Tamb.≤ Tpreset -28 F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
run at preset speed.
When Tpreset-28 F<Tamb.< Tpreset+34 F, the unit will remain at its previous state.
Under this mode, the four-way valve will be de-energized and temperature can be set within a range from 61 F to 86 F
If the compressor is shut down for some reasons , the indoor fan and the swing device will operate at original state.
Tamb
Start cooling
Tpreset
Original working state
Tpreset -28 F
Stop cooling
6 minutes
3 minutes
6 minutes
Compressor
Outdoor fan
Indoor fan
Preset fan Speed
Run
Stop
Protection
Antifreeze protection
Under cooling and dry mode, 6 minutes after the compressor is started:
If T evap.≤ 36 F , the compressor will operate at reduced frequency.
If T evap.≤ -30 F is detected for durative 3 minutes, the compressor will stop, and after 30 seconds, the outdoor fan will stop;
and under cooling mode, the indoor fan and the swing motor will remain at the original state.
If T evap. ≥ 42 F and the compressor has remained at OFF for at least 3 minutes, the compressor will resume its original
operation state.
Total current up and frequency down protection
If I total≤ A, frequency rise will be allowed; if I total ≥ B, frequency rise will not be allowed; ifI total ≥ C, the compressor will
run at reduced frequency; and if I total ≥ D, the compressor will stop and the outdoor fan will stop with a time lag of 30s.
(2) Dry Mode
Working conditions and process of dry
If T amb. Tpreset, the unit will enter cooling and dry mode, in which case the compressor and the outdoor fan will
operate and the indoor fan will run at low speed.
If T preset-28 F Tamb.≤ Tpreset, the compressor remains at its original operation state.
If T amb.< Tpreset -28 F , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at low speed.
27
Function and Control
Protection
Protection is the same as that under the cooling mode.
(3) Heating Mode
Working conditions and process of heating
If T amb.≤Tpreset+36°F, the unit enters heating mode, in which case the four-way valve, the compressor and the outdoor fan
will operate simultaneously, and the indoor fan will run at preset speed in the condition of preset cold air prevention.
If T amb.≥Tpreset+41°F, the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will stop
after 60-second blow at low speed
If T preset+36°F<T amb.< Tpreset +41°F, the unit will maintain its original operating status.
Under this mode, the four-way valve is energized and temperature can be set within a range of 61 - 86°F . The
operating symbol, the heating symbol and preset temperature are revealed on the display.
Condition and process of defrost
When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes,
and one of the following conditions is reached, the unit will enter the defrost mode after 3 minutes.
a.
Toutdoor amb.≥A°F, Toutdoor tube ≤W°F;
b.
A°F≤Toutdoor amb.<B°F, Toutdoor tube ≤X°F;
c.
B°F≤Toutdoor amb.<C°F, Toutdoor tube ≤Y°F;
d.
Touter amb.<C°F, Touter tube ≤Z°F
At that time, the indoor fan stops and the compressor stops, and after 30 seconds the outdoor fan will stop, and then after 30
seconds, the four-way valve will stop. After 30 seconds, the compressor is initiated for raising the frequency to defrost
frequency.
When the compressor has operated under defrost mode for 7.5 minutes, or Touter tube ≥E°F, the compressor will be converted
to 53Hz operation. After 30 seconds, the compressor will stop. And after another 30 seconds, the four-way valve will be
opened, and after 60 seconds, the compressor and the outdoor fan will be started, the in door fan will run under preset cold air
prevention conditions, and H1 will be displayed at temperat ure display area on the display panel. Defrost frequency is
70Hz.
3.Protection
Cold air prevention
The unit is started under heating mode (the compressor is ON):
In the case of Tindoor amb.<75°F : if T tube ≤104°F and the indoor fan is at stop state, the indoor fan will begin to run at low
speed with a time lag of 2 minutes. Within 2 minutes, if Ttube >40 , the indoor fan also will run at low speed; and after
1-minute operation at low speed, the indoor fan will be converted to operation at preset speed. Within 1-minute low speed
operation or 2-minute non-operation, if Ttube >108°F , the fan will run at present speed.
In the case of Tindoor amb.≥75°F : if Ttube ≤108°F, the indoor fan will run at low speed, and after one minute, the indoor fan
will be converted to preset speed. With in one-minute low speed operation, if Ttube >108°F , the indoor fan will be converted
to preset speed.
1
2 refers to, under initially heating mode, the indoor ambient temperature before the
Note: Tindoor amb.
command to start the compressor is performed according to the program, or after the unit is withdrawn from defrost, the
indoor ambient temperature before the defrost symbol is cleared.
Total current up and frequency down protection
If the total current I total ≤W, frequency rise will be allowed; if Itotal ≥X, frequency rise will not be allowed; if Itotal ≥Y, the
compressor will run at reduced frequency; and if Itotal ≥Z, the compressor will stop and the outdoor fan will stop with a time
lag of 30s.
(4) Fan Mode
Under the mode, the indoor fan will run at preset speed and the compressor, the outdoor fan, the four-way valve and the
electric heater will stop.
Under the mode, temperature can be set within a range of 61°F - 86°F.
(5) AUTO Mode
Working conditions and process of AUTO mode
Under AUTO mode, standard cooling temperature Tpreset is 77°F and standard heating temperature Tpreset is 64.4°F.
a.
Once energized, if Tamb.≤68°F, the unit will be started under heating mode; if 68°F < Tamb .< 77°F, the unit will run
under fan mode and the operation indicator lamp will be bright; and if Tamb.≥77°F, the unit will be started under cooling mode.
28
Function and Control
a. Under AUTO mode, if Tamb.≥Tpreset is detected, the unit will select to run under cooling mode, in which case implicit
preset temperature is 77°F; if T amb.≤Tpreset 28°F, the compressor will stop, the outdoor fan will stop with a time lag of 1
minute, and the indoor fan will run at preset speed; and if Tpreset –(28°F )< Tamb.< Tpreset , the unit will remain at its original
state.
b. Under AUTO mode, if Tamb
. ≤Tpreset +36°F is detected, the unit will select to run under heating mode, in which case
implicit preset temperature is 64°F ; if Tamb .≥Tpreset 41°F, the compressor will stop, the outdoor fan will stop with a time lag
of 1 minute, and the indoor fan will run under the mode of residue heat blowing; and if Tpreset +36°F < Tamb.< Tpreset +41°F, the
unit will remain at its original state. The cooling-only unit will run under fan mode.
c. Under AUTO mode, if 68°F< Tamb.< 77°F, the unit will remain at its original state.
2.Protection
a. In cooling operation, protection is the same as that under the cooling mode;
b. In heating operation, protection is the same as that under the heating mode;
c. When ambient temperature changes, operation mode will be converted preferentially. Once started, the compressor will
remain unchanged for at least 6 minutes.
(6) Common Protection Functions and Fault Display under COOL, HEAT, DRY and AUTO Modes
Overload protection
Ttube : measured temperature of outdoor heat exchanger undercooling mode; and measured temperature of indoor heat
exchanger under heating mode.
1) Cooling overload
a. If T tube ≤106°F , the unit will return to its original operation state.
b. If T tube ≥131°F, frequency rise is not allowed.
c. If T tube ≥136°F, the compressor will r un
at reduced frequency.
d. If T tube ≥144°F , the compressor will stop and the indoor fan will run at preset speed.
2) Heating overload
a. If T tube ≤106°F , the unit will return to its original operation state.
b. If T tube ≥131°F, frequency rise is not allowed.
c. If T tube ≥136°F, the compressor will run at reduced frequency.
d. If T tube ≥144°F , the compressor will stop and the indoor fan will blow residue heat and then stop.
Exhaust temperature protection of compressor
If exhaust temperature ≥ 208°F, frequency is not allowed to rise.
If exhaust temperature ≥ 217°F, the compressor will run at reduced frequency.
If exhaust temperature ≥ 230°F, the compressor will stop.
If exhaust temperature ≤ 194°F and the compressor has stayed at stop for at least 3 minutes, the compressor will resume its
operation.
Communication fault
If the unit fails to receive correct signals for durative 3 minutes, communication fault can be justified and the whole system
will stop.
Module protection
Under module protection mode, the compressor will stop. When the compressor remains at stop for at least 3 minutes, the
compressor will resume its operation. If module protection occurs six times in succession, the compressor will not be started
again.
Overload protection
If temperature sensed by the overload sensor is over 239°F, the compressor will stop and the outdoor fan will stop with a
time lag of 30 seconds. If temperature is below 203°F, the overload protection will be relieved.
If voltage on the DC bus is below 150V or over 420V, the compressor will stop and the outdoor fan will stop with a time
lag of 30 seconds. When voltage on the DC bus returns to its normal value and the compressor has stayed at stop for at least
3 minutes, the compressor will resume its operation.
Faults of temperature sensors
29
Function and Control
Designation of sensors
Faults
The sensor is detected to be open-circuited or short-circuited for successive 30
Indoor ambient temperature
seconds
The sensor is detected to be open-circuited or short-circuited for successive 30
Indoor tube temperature
seconds
The sensor is detected to be open-circuited or short-circuited for successive 30
Outdoor ambient temperature
seconds
The sensor is detected to be open-circuited or short-circuited for successive 30
Outdoor tube temperature
seconds, and no detection is performed within 10 minutes after defrost begins.
After the compressor has operated for 3 minutes, the sensor is detected to be
Exhaust
open-circuited or short-circuited for successive 30 seconds.
After the compressor has operated for 3 minutes, the sensor is detected to be
Overload
open-circuited or short-circuited for successive 30 seconds.
3. Other Controls
(1) ON/OFF
Press the remote button ON/OFF: the on-off state will be changed once each time you press the button.
(2) Mode Selection:
Press the remote button MODE, then select and show in the following ways: AUTO, COOL, DRY, FAN, HEAT, AUTO.
(3) Temperature Setting Option Button
Each time you press the remote button TEMP+ or TEMP-, the setting temperature will be up or down by 34°F. Regulating
Range: 61°F~86°F, the button is useless under the AUTO mode.
(4) Time Switch
You should start and stop the machine according to the setting time by remote controller.
(5) SLEEP State Control
a. When the air conditioner is under the mode of COOL, DRY, and the SLEEP mode has been set well, after the SLEEP
state keeps about 1 hour, the pre-setting T will raise 34°F, and it will raise 34°F again after 2 hours, so it raise 36°F in
2 hours, then it will run on at the setting temperature and fan speed.
b. When the air conditioner is under the mode of HEAT, and the Timer has been set well, after the SLEEP state keeps about
1 hour, the pre-setting T will reduce 34°F, and it will reduce 34°F again after 2 hours, so it reduce 36°F in 2 hours, then
it will run on at the setting temperature and wind speed.
c. The setting temperature keeps the sa me under the FAN mode and AUTO mode.
(6) Indoor Fan Control
The Indoor Fan can be set as HIGH, MED, LOW by remote controller, and the Indoor Fan will be respectively run at high,
medium, low speed. It will also be set as AUTO, and the Indoor Fan is as the following at the automatic fan speed.
Cooling mode: Tring ≥ T setting+ 2, high speed; Tsetting- 2 T ring T setting+ 2, medium speed; Tring ≤ Tsetting – 2, low speed.
Sending fan mode: : Tring T setting+ 4, high speed; Tsetting +2≤T ring ≤ T setting+ 4, medium speed; T ring
T setting+2, low
speed.
Moisture removal mode: force to be set as the low speed
Heating mode: T ring ≤ Tsetting+ 1 high speed; Tsetting+1 Tring T setting+ 5, medium speed; Tring ≥Tsetting+ 2, low speed.
(7) Buzzer Control
The buzzer will send a
sound when the air conditioner is powered up or received the information sent by the remote
control or there is a button input, the single tube cooler doesn’t receive the remote control ON signal under the mode of
heating mode.
(8) Auto button
If the controller is on, it will stop by pressing the button, and if the controller is off, it will be automatic running state by
pressing the button, swing on and light on, and the main unit will run based on the remote control if there is remote control
order.
(9) Up-and-Down Swinging Control
When power on, the up-and-down motor will firstly move the air deflector to o counter-clockwise, close the air outlet.
After starting the machine, if you don’t set the swinging function, heating mode and auto-heating mode, the up-and-down
air deflector will move to D clockwise; under other modes, the up-and-down air deflector will move to L1. If you set the
swing function when you start the machine, then the wind blade will swing between L and D. The air deflector has 7
swing states: Location L, Location A, Location B, Location C, Location D, Location L to Location D, stop at any
location between L-D (the included angle between L~D is the same). The air deflector will be closed at 0 location, and the
swing is effectual only on condition that setting the swing order and the inner fan is running. The indoor fan and
compressor may get the power when air deflector is on the default location.
30
Function and Control
Heating angle
Cooling angle
(10) Display
Operation pattern and mode pattern display
All the display patterns will display for a time when the unit is powered on, the operation indication icon will display in red under
standby status. When the machine is start by remote controller, the indication icon will light and display the current
operation mode (the mode light includes: Cooling, heating and dry). If you close the light key, all the display icons
will close.
Double-8 display
According to the different setting of remote control, the nixie lamp may display the current temperature (the temperature
scope is from 61°F to 86°F ) and indoor ambient temperature. The heating and air supply temperature will display 77°F
under auto-mode, the temperature will display 64 F under the heating mode, and the temperature will display H1 under the
defrosting mode.(If you set the fahrenheit temperature display, the nixie lamp will display according to fahrenheit
temperature)
(11) Protection function and failure display
E2: Freeze-proofing protection
E4: Exhausting protection
E5: Overcurrent protection
E6: Communication failure
E8: Overload protection
F1: Indoor ambient sensor start and short circuit (continuously measured failure in 30S)
F2: Indoor evaporator sensor start and short circuit (continuously measured failure in 30S)
F3: Outdoor ambient sensor start and short circuit (continuously measured failure in 30S)
F2: Outdoor condenser sensor start and short circuit (continuously measured failure in 30S, and don’t measure within 10
minutes after defrosted)
F5: Outdoor exhausting sensor start and short circuit (continuously measured failure in 30S after the compressor operated 3
minutes)
H3: Overload protection of compressor
H5: Module protection
PH: High-voltage protection
PL: Low-voltage protection
P1: Nominal cooling and heating
P2: Maximum cooling and heating
P3: Medium cooling and heating
P0: Minimum cooling and heating
(12) Drying Function
You may start or stop the dry function under the modes of cooling and dry at the starting status (The modes of
automatism, heating and air supply do not have dry function). When you start the dry function, after stop the
machine by pressing the switch button, you should keep running the infoor fans for 10 minutes under low air damper (The
swing will operate as the former status within 10 minutes, and other load is stopped), then stop the entire machine; When
you stop the dry function, press the switch button will stop the machine directly.
When you start the drying function, operating the drying button will stop the inner fans and close the guide louver.
(13) Memory function when interrupting the power supply
Memory content: mode, swing function, light, set temperature and wind speed.
After interrupted the power supply, the machine will start when recovering the power according to the memory content
automatically. If the last remote control command has not set the timed function, the system will remember the last remote
control command and operate according it. If the last remote control command has set timed function and the power supply
is interrupted before the timed time, the system will remember the timed function of the last remote control command, the
timed time will recounted form power on. If the last remote control command has set timed function, the time is out and the
system is start or stop according to the set time when the power supply is interrupted, the system will remember the
operation status before the power supply was interrupted, and do not carry out timed action; The timed clock will not be
remembered.
31
Function and Control
6.3 Detection of temperature sensor malfunction
Detect malfunctions of temperature sensor any time.
In defrosting period, the temperature sensor malfunction will not be detected. 5 min after finishing defrosting, the system begins to
detect the temperature sensor malfunction. In other times, the temperature sensor malfunction will be detected.
1. When short-circuit occurs to the temperature sensor for 30s:
The temperature sensor overheats. In this case, the complete unit will stop for protection. At the same time, the temperature protection
and temperature sensor malfunction will be shown.
2. When break-circuit occurs to the temperature sensor for 30s:
The unit will stop and the temperature sensor malfunction will be displayed
6.4 Frequency Control
<Outline>
When starting the compressor, or when conditions are varied due to the change of the room, the frequency must be initialized according
to the D value of the indoor unit and the Q value of the indoor unit.
Q value: Indoor unit output determined from indoor unit volume, air flow rate and other factors.
1. Pcontrol
Calculate
D value in each sampling time (20 seconds), and adjust the frequency according to its difference from the frequency
previously calculated.
2. Icontrol
If the operating frequency is not change more than a certain fixed time, adjust the frequency up and down according to the
obtaining the fixed D value.
When the
When the
D value,
D value is small...lower the frequency.
D value is large...increase the frequency.
3. Frequency management when other controls are functioning
When frequency is drooping;
Frequency management is carried out only when the frequency droops.
For limiting lower limit
Frequency management is carried out only when the frequency rises.
4. Upper and lower limit of frequency by PI control
The frequency upper and lower limits are set depending on indoor unit.
When low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit, the
upper limit frequency must be lowered than the usual setting.
6.5 3-minutes Standby
Prohibit to turn ON the compressor for 3 minutes after turning it off.(except when defrosting)
6.6 Compressor Protection Function
When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when
defrosting.)
Frequency
32
FCG 3
88
FCG 2
64
FCG 1
TCG1
48
240
TCG2
TCG3
360
180
FCG3
FCG2
FCG1
TCG 1sec
TCG 2sec
TCG 3sec
Time
Function and Control
6.7 Discharge Pipe Control
Outline
The discharge pipe temperature is used as the compressor’s internal temperature. If the discharge pipe temperature rises above a
certain level, the operating frequency upper limit is set to keep this temperature from going up further.
Detail
Divide the Zone
Stop zone
Drooping zone
Keep zone
Up zone
Heat exchanger
thermistor
temperature
Reset zone
Management within the Zones
Zone
Stop zone
Drooping zone
Keep zone
Return / Reset zone
Control contents
When the temperature reaches the stop zone, stop the compressor and
correct abnormality.
Start the timer, and the frequency will be drooping.
Keep the upper limit of frequency.
Cancel the upper limit of frequency.
6.8 Input Current Control
Outline
Detect an input current by the CT during the compressor is running, and set the frequency upper
limit from such input current.
In case of heat pump model, this control is the upper limit control function of the frequency which
takes priority of the lower limit of four way valve activating compensation.
Detail
The frequency control will be made within the following zones.
2 Hz drooping
1.0second after
rushing in the
drooping zone
After 2.5 seconds
Compressor stops
1
Stop zone
2
Drooping zone
Keep zone
3
Reset zone
When a “stop current” continues for 2.5 seconds after rushing on the stop zone, the compressor operation stops.
If a “drooping current” is continues for 1.0 second after rushing on the drooping zone, the frequency will be 2 Hz drooping.
Repeating the above drooping continues until the current rushes on the drooping zone without change.
In the keep zone, the frequency limit will remain.
In the return / reset zone, the frequency limit will be cancelled.
Limitation of current drooping and stop value according to the outdoor air temperature
1. In case the operation mode is cooling
* The current droops when outdoor air temperature becomes higher than a certain level (model by model).
2. In case the operation mode is heating
* The current droops when outdoor air temperature becomes higher than a certain level (model by model).
6.9 Freeze-up Protection Control
Outline
33
Function and Control
During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent
freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings.)
Detail
Conditions for Start Controlling
Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start.
Control in Each Zone
Heat exchanger
thermistor temperature
A
Up zone
B
Keep zone
C
Drooping zone
D
Stop zone
E
34
Return/Reset zone
Function and Control
Frequency
PI control
0Hz
60sec.
50sec.
Compressor
Four way valve
600sec.
50sec.
ON
OFF
ON
OFF
5sec.
Fan
5sec.
ON
OFF
Electronic expansion
valve opening
450pps
350pps
450pps
Initial opening
6.12 Fan Control
Outline
Fan control is carried out according to the following priority.
1. Fan ON control for electric component cooling fan
2. Fan control when defrosting
3. Fan OFF delay when stopped
4. ON/OFF control in cooling operation
5. Tap control when drooping function is working
6. Fan control in forced operation
7. Fan control in indoor/outdoor unit silent operation
8. Fan control in powerful mode
9. Fan control in normal operation
Detail
Fan OFF Control when Stopped
* Fan OFF delay for 60 seconds must be made when the compressor is stopped.
Tap Control in indoor/outdoor unit silent operation
1. When Cooling Operation
When the outdoor air temperature is lower than 99°F, the fan tap must be set to L.
2. When Heating Operation
When the outdoor air temperature is higher than 39°F, the fan tap must be turned to L (only for heat pump model).
35
Installation Manual
7. Installation Manual
7.1 Notices for installation
Important Notices
The unit installation work must be done by qualified personnel according to the local
rules and this manual.
Before installating, please contact with local authorized maintenance center, if unit is
not installed by the authorized maintenance center, the malfunction may not solved,
due to discommodious contacts.
When removing the unit to the other place, please firstly contact with the authorized
Maintenance Center in the local area.
T he appliance must be positioned so that the plug is accessible
After pull out the power plug then make the appliance operation again,to avoid the
icing of outdoor unit damage axial flow fan,should electrify the appliance but not
operation for 4 hours for warm-up purpose(only for Heat Pump models).
Basic Requirements For Installation Position
Install in the following place may cause malfunction. If it is unavoidable contact with
service center please:
Place where strong heat sources, vapors, flammable gas or volatile object are emitted.
Place where high-frequency waves are generated by radio equipment, welders and
medical equipment.
Place where a lot of salinities such as coast exists.
Place where the oil (machine oil) is contained in the air.
Place where a sulfured gas such as the hot spring zones is generated.
Other place with special circumstance.
Indoor Unit Installation Position Selection
The air inlet and outlet vent should be far from the obstruction, make sure that the air
can be blown through the whole room.
Select a position where the condensing water can be easily drained out, and the place
is easily connected for outdoor unit.
Select a location where the children can not reach.
Can select the place where is strong enough to withstand the full weight and vibration o f
the unit. And will not increase the noise.
Be sure to leave enough space to allow access for routine maintenance. The height of the
installed location should be 8ft or more from the floor.
Select a place about 1m or more away from TVset or any other electric appliances.
Select a place where the filter can be easily taken out.
Make sure that the indoor unit installation should accord with installation dimension
diagram requirements.
Do not use the unit in the immediate surroundings of a laundry a bath a shower or a
swimming pool.
36
Installation Manual
Outdoor Unit Installation Position Selection
Select a location from which noise and outflow air emitted by unit will not inconvenience
neighbors, animals, plants.
Select a location where there should be sufficient ventilation.
Select a location where there should be no obstructions cover the inlet and outlet vent .
The location should be able to withstand the full weight and vibration of the outdoor unit
and permit safe installation.
Select a dry place, but do not expose under the direct sunlight or strong wind.
Make sure that the outdoor unit installation dimension should accord with installation
dimension diagram, convenient for maintenance, repair.
The height difference of connecting the tubing within 16ft, the length of connecting the
tubing within 32ft.
Select a place where it is out of reach for the children.
Select a place where will not block the passage and do not influence the city appearance.
Safety Requirements For Electric Appliances
1. The power supply should be used the rated voltage and AC exclusive circuit,
the power cable diameter should be satisfied.
2. Don't drag the power cable emphatically.
3. It should be reliably earthed, and it should be connected to the special earth device,
the installation work should be operated by the professional.
The air switch must have the functions of magnetic tripping and heat tripping, in order
to protect the short circuit and overloading.
4. The min. distance from the unit and combustive surface is 5ft.
5. The appliance shall be installed in accordance with national wiring regulations.
6. An all-pole disconnection switch having a contact separation of at least 3mm in all poles
should be connected in fixed wiring.
Make sure that the Live wire or Zero line as well as the ground wire in the family power
socket can not be wrong connected, there should be reliable and no short circuit in the
diagram.
wrong connection may cause fire.
Ground requirements
1. Air conditioner is type I electric appliance, thus please do conduct reliable earthing
measure.
2. The yellow-green two-color wire in air conditioner is earthing wire and cannot be used
for other propose. It cannot be cut off and be fix it by screw, otherwise it would cause
electric shock.
3. The earth resistance should accord to the National Criterion.
4. The user power must offer the reliable grounding terminal. Please don't connect the
earthing wire with the following place:
Tap water pipe.
Gas pipe.
Contamination pipe.
Other places that professional personnel consider them unreliable.
5. The model and rating values for fuses according the silk print on fuse cover or related
PCB board.
37
Installation Manual
7.2 Installation dimension diagram
Space to the ceiling
6 in.
side
above
Space to the wall
6 in. to side
6 in. to side
Space to the wall
10
ft.
m
fro
nt
f ro
6 ft.
from
bottom
Air outlet side
Space to the floor
Space to the obstruction
12 in. side
19 in. top
The dimensions of the space necessary for correct
installation of the appliance including the minimum
permissible distances to adjacent structures
Air inlet side
ck
ba
n.
i
12
Space to the wall
Space to the wall
12 in. side
7f
t.
nt
fro
Air outlet side
38
Installation Manual
7.3 Installing Indoor Unit
Installing Mounting Plate
1.Make the mounting plate completely level . As the water tray's oulet of the indoor unit is two-way type, the
indoor unit during installation should slightly slant to watert tray's outlet for smooth drainage of condensing
water.
2.Fix the mounting plate on the wall with screws.(Where is pre-covered with plastic granula)
3.Be sure that the mounting plate has been fixed firmly enough to withstand the weight of an adult of 60kg;
further more, the weight should be evenly shared by each screw.
Wall
Space
to the
wall
6 in
above
Mark on the middle of it
Gradienter
Wall
Space
to the
wall
6 in
above
Right
Left
2.5 in
Fig.5
(Rear piping hole)
2.5 in
(Rear piping hole)
Boring Piping Hole
Indoor
1.Make the piping hole (2.5 in) in the wall at a slight downward slant to the
outdoor side.
Wall pipe
2.Insert the piping-hole sleeve into the hole to prevent the connection piping
and wiring from being damaged when passing through the hole.
Outdoor
Seal pad
Ø55
Installing Drain Hose
1.For proper draining, the drain hose should be placed at a downward slant. Wrenched
2.Do not wrench or bend the drain hose or flood its end by water.
3.The long drain hose passing through indoor areas should
be wrapped with insulation material.
Bent
Flooded
Connecting Indoor and Outdoor Electric Wires
1.Open the front panel.
2.Remove the wiring cover as shown in Fig 6.
unit)
the the
holehole
in the
3.Make the power connection cord and signal control wire (only
(onlyffororheat
heatpump
pump
unitthrough
) through
in the
the back of indoor unit.
4.Reinstall the clamp and wiring cover.
5.Recovert he front panel.
Fig.6
39
Installation Manual
NOTE:
All interconnecting wiring between indoor and outdoor unit must be performed by a
a licenced electrical contractor
The electric wiring must be correctly connected.Improper connection may cause spare parts
malfunction.
Tighten the terminal screws adequately to prevent loosening.
After tightening the screws, slightly pull the wire and confirm whether it is firm or not.
Ensure the electrical connections are properly earthed to prevent electrical shocks.
Ensure all wiring connections are secure and the cover plates are reinstalled properly.Poor
installations that allow dust or moisture incursion may cause fire or electrocution.
Installing Indoor Unit
The piping can be output from right, right rear, left
or left rear.
When routing the piping and wiring from the left
or right side of indoor unit, cut off the tailings
from the chassis as necessary(As shown in Fig.7)
Cut off the tailings 1 when routing the wiring only;
Cut off the tailings 1 and tailings 2 when routing
both the wiring and piping.
Take out the piping from body case, wrap the piping,
power cords, drain hose with the tape and make them
through the piping hole. (As shown in Fig.8)
Hang the mounting slots of the indoor unit on the
upper hooks of the mounting plate and check if it is
firm enough.(As shown in Fig.9)
The height of the installed location should be 6ft
8ft
or more from the floor.
Gas side pipe
External connection
electric wire
Liquid side piping
Tailing 2
side piping
Tailing 1 Gas
insulation
Fig.7
Liquid side
Piping insulation
Finally wrap it
Water drainage pipe
with tape
Left
Left rear
Right
Right rear
Fixing hook
Mounting
plate
Fig.8
Mounting
plate
Fig.9
Installing Connection Pipe
Align the center of the piping flare with the relevant valve.
Screw in the flare nut by hand and then tighten the
nut with spanner and torque wrench referring to the
following:
Hex nut diameter
Tightening torque (lb ft)
11 ~ 14.7
22.8 ~ 25.8
36.9 ~ 40.6
44.3 ~ 47.9
51.6 ~ 55.3
Indoor unit piping
Spanner
Taper nut Piping
Torque
wrench
NOTE: Firstly connect the connection pipe to indoor unit, then to outdoor unit; pay attention
to the piping bending, do not damage the connection pipe; ensure the joint nut is adequately
tightened, otherwise it may cause leakage.
40
Installation Manual
7.4 Installing Outdoor Unit
Electric wiring
Disassemble the cable cross plate sub-assy on the outdoor unit right side plate.
Take off wire clamp. Connect and fix power connect
cord (for cooling and heating unit,connect and fix power
connect cord and signal control wire)to terminal of line
bank. Wiring should fit that of indoor unit.
Fix the power connection cable with wire clamp,
(for cooling and heating unit, use the wire clamp
to fix the power connection cable and the signal
control wire), then connect the corresponding
connector.
Ensure wire has been fixed well.
Install the cable cross plate sub-assy.
Cable Cross Plate sub-assy
For 115V Uints
Power
For 208~230V Uints
Power
NOTE:
*Note: Terminal 2 is the communication connection
Wrong wiring may cause spare parts malfunction.
After the cable fixed, make sure there should be a free space between the connection
and connection and fixing place on the lead wire.
Air purging and leakage test
1. Connect charging hose of manifold valve to charge end of low pressure
valve (both high/low pressure valves must be tightly shut).
2. Connect joint of charging hose to vacuum pump.
Liquid pipe
3. Fully open handle handle of Lo manifold valve.
Gas pipe
4. Open the vacuum pump to evacuate. At the beginning, slightly
Valve
cap
loosen joint nut of low pressure valve to check if there
is air coming inside. (If noise of vacuum pump has
been changed, the reading of multimeter is 0) Then
tighten the nut.
5. Keep evacuating for more than 15mins and make
5
sure the reading of multi-meter is
Vacuum
gauge
Vacuum pump
Fig.
6. Fully open high/low pressure valves.
7. Remove charging hose from charging end of low pressure valve.
8. Tighten bonnet of low-pressure valve. (As shown in Fig.10)
Condensate drainage of outdoor unit (not for cooling only)
The condensate and defrosting water formd during heating
in the outdoor unit can be properly discharged by drainage
pipe .
Installation method:set the drain connection in Ø 25 hole of the
chassis has been installed and then connect drainage pipe
with drain nozzle,so that condensate and defrosting water can
be properly discharged
Chassis
Drain
connection
41
Installation Manual
7.5 Check after Installation and Operation Test
Check after Installation
Items to be checked
Possible malfunction
Has it been fixed firmly?
The unit may drop, shake or emit noise.
Have you done the refrigerant leakage test?
It may cause insufficient cooling(heating)
capacity
Is heat insulation sufficient?
It may cause condensation and dripping.
Is water drainage satisfactory?
It may cause condensation and dripping.
Is the voltage in accordance with the rated
voltage marked on the nameplate?
Is the electric wiring and piping
connection installed correctly and securely?
Has the unit been connected to a secure
ground connection?
It may cause electric malfunction
or damage the product.
It may cause electric malfunction
or damage the part.
It may cause electrical leakage.
Is the power cord specified?
It may cause electric malfunction
or damage the part.
Are the inlet and outlet openings blocked?
It may cause insufficient cooling(heating)
capacity.
Is the length of connection pipes
and refrigerant capacity been recorded?
The refrigerant capacity is not accurate.
Operation Test
Before Operation Test
Do not switch on power before installation is finished completely.
Electric wiring must be connected correctly and securely.
Cut-off valves of the connection pipes should be opened.
All the impurities such as scraps and thrums must be cleared from the unit.
Operation Test Method
Switch on power and press "ON/OFF" button on the wireless remote controller to start
the operation.
Press MODE button to select the COOL, HEAT (Cooling only unit is not available),
FAN to check whether the operation is normal or not.
42
Installation Manual
7.6 Installation and Maintenance of Healthy Filter(Optional)
Installation of Healthy Filter
1. Lift up the front panel from the two ends
of it, as the arrow direction shown. Then
pull the air filter out. (as shown Fig.a)
Fig. a
2. Attach the healthy filter onto the air filter,
(as shown in Fig.b)..
Fig. b
Air filter
Healthy filter
3. Mount the air filter properly along the arrow
direction in Fig.c, and then close the panel cover.
Fig. c
Cleaning and Maintenance
Remove the healthy filter before cleaning and re-install it after clean
according to the installation instruction, but can't with brush or hard
things. After washing, be sure to shake off remaining water and dry
in the shade.
Service Life
The healthy filter commonly has its usage life time for one year under
normal condition. As for silver ion filter, it is invalid when its surface
becomes black (green).
ƽThis
supplementary instruction is provided for reference to the unit with
healthy filter. If the graphics provided herein is different from the physical
goods, the latter one shall prevail. The quantity of healthy filters shall be
based on the actual delivery.
43
Troubleshooting
9. Troubleshooting
9.1 Precautions before Performing Inspection or Repair
Be cautious during installation and maintenance. Do operation following the regulations to avoid electric shock and casualty or even death
due to drop from high altitude.
* Static maintenance is the maintenance during de-energization of the air conditioner.
For static maintenance, make sure that the unit is de-energized and the plug is disconnected.
* Dynamic maintenance is the maintenance during energization of the unit.
Before dynamic maintenance, check the electricity and ensure that there is ground wire on the site. Check if there is electricity on the
housing and connection copper pipe of the air conditioner with voltage tester. After ensure insulation place and the safety, the maintenance can be performed.
Take sufficient care to avoid directly touching any of the circuit parts without first turning off the power.
At times such as when the circuit board is to be replaced, place the circuit board assembly in a vertical position.
Normally,diagnose troubles according to the trouble diagnosis procedure as described below.(Refer to the check points in servicing
written on the wiring diagrams attached to the indoor/outdoor units.)
No.
Troubleshooting procedure
Precautions when inspecting the control section of the outdoor
unit:
A large-capacity electrolytic capacitor is used in the outdoor unit controller
1
Confirmation
2
Judgement by Flashing LED of Indoor/Outdoor Unit
3
How to Check simply the main part
(inverter).Therefore,if the power supply is turned off,charge(charging voltage DC280V to 380V)remains and discharging takes a lot of time.. After
turning off the power source,if touching the charging section before
discharging, an electrical shock may be caused.
Please open the outdoor unit after the unit is power off for 20min.
9.2 Confirmation
(1)Confirmation of Power Supply
Confirm that the power breaker operates(ON) normally;
(2)Confirmation of Power Voltage
Confirm that power voltage is AC
220-240±
115
± 10%. 10%.
If power voltage is not in this range, the unit may not operate normally.
9.3 Judgement by Flashing LED of Indoor/Outdoor Unit
*Trouble shooting is for cooling and Heat Pump models.
44
Troubleshooting
The breaker trips at once when it is set to
"ON".
Trip of breaker or blow
of fuse
The breaker trips in few
minutes
when it is set to "ON"
Measure insulation resistance to grou
nd to see if there is any leakage.
The circuit or the part of the air conditioner has
malfunction. They heat and break the insulation
and lead to short circuit or creepage. Measure
the insulation resistance or eliminate the malfunction one by one. If the breaker itself has
malfunction, then replace the breaker.
Check power supply circuit.
Air conditioner can not start up
No power
The air conditioner
does not react after
it is powered ( after
the plug is inserted,
the buzzer does
not sound and the
remote startup has
no response)
Power plug is not well plugged in and poor
connection
Check if the plug is properly plugged in
and make the loose contact firm.
Fuse of controller burnt out
Change controller fuse
The transformer connection is loose or has
bad contact or the transformer has
malfunction
Fasten the wiring; measure the output
voltage of the transformer, if it is
incorrect, change the transformer
Controller is broken
The remote controller signals (after it is
powered, the buzzer
will sound, unless it
has malfunction)
Check remote controller
Remote controller is short of power
Change batteries
Remote controller malfunction
First, press the manual switch button
AUTO,if there is no response,check
based on the above methods. If it runs
normally after pressing the button,check
again whether the installation position
and the connection wire of the reception
head is correct. If it is correct,then replace the receiver or the remote controller.
Receiver loose or poor connection
Receiver is broken
Power voltage is too low
Check the voltage. If it is lower than 10% of the rated
voltage, check the cause, improve the power supply
condition and add the stabilized voltage power supply.
45
Troubleshooting
Improper set of temperature
Adjust set temperature
If cooling (heating) load is
Check the forecasted load of cooling (heating)
proper
The refrigerant has leakage or is
insufficient
heck and fill the leakage, then
vacuumize it and supplement the refrigerant as required
Leakage between the high presMalfunction of
refrigerant
flow
sure and the low pressure inside the compressor
Malfunction of four-way valve
Local block of capillary
Poor COOL(HEAT) operation
Replace the compressor
Blockage of cooling system
Heat insulation for the connection
pipes of the indoor unit and the outdoor unit is bad.
Replace the four-way valve
Replace the capillary
Judge whether the system is blocked by
observing the condensation of evaporator and the pressure value of the high
pressure manometer and take measures
to deal with the system.
Make sure that heat insulation for the thick and thin pipes
is good. Heat insulation must also be provided for the
joint andthe exposed part of the copper pipe .
Block of outdoor heat exchanger
Clean the dust accumulated on the surface of
the heat exchanger.
Air filter were blocked
Clean the filter
To set the fan speed to high or
Fan speed was set too slow
Air circulation
is insufficient
Fan rotation speed becomes
low
The installation position of the
outdoor unit is not appropriate.
The outdoor temperature is too high.
The air tightness is not enough. People
come in and out too frequently. There
are heating devices indoors.
46
middle speed
Capacitor
damage
Replace the capaci-
Motor damage
Replace the motor
tor
Good ventilation must be provided for the
installation position of the outdoor unit.
Properly install the rainproof plate or the sunproof plate. If the
maximum cool air still can not meet the requirement, it is suggested to replace the air conditioner.
Keep certain air tightness indoors, try not to use
electricalappliance with large quantity of heat
Troubleshooting
The fan does not
run when it is set
to supply air.
In the cooling and
heating mode, the
compressor runs,
but the outdoor
fan does not run.
The indoor fan motor is burned or breaks or has the heat protector malfunction.
Replace the fan motor or the defective part.
The built-in heat protector of the motor
breaks frequently because the motor is
abnormal.
Replace the fan motor
Wrong connection
Make the correction connection based on the circuit
drawing.
The fan capacitor has open circuit or
is damaged
Replace the fan capacitor of the same type and same
specification.
The outdoor fan motor is damaged.
Replace the fan motor
Wrong connection
Make the correct connection based on the circuit
drawing.
The outdoor fan capacitor is damaged.
Replace the fan capacitor
Malfunction of compressor
When cooling or
heating, outdoor
fanruns,compressor
doesn't run.
The compressor is
too hot and leads to
the action of the
protector.
Replace the compressor
Breakage of running capacitor of
compressor
Replace the capacitor
The voltage is too low or too high.
Manostat is recommended.
Wrong wire connection
Connect the circuit diagram correctly
The protector itself has malfunction.
Use the multimeter to check whether the contact of
the compressor is on when it is not overheated. If it
is not on, then replace the protector
The refrigerant is not enough or is too
much.
Adjust the volume of the refrigerant
The capillary is blocked and the temperature rises.
Replace the capillary
The compressor does not run smoothly
or is stuck. The air discharge valve is
damaged
The protector itself has malfunction.
Replace the compressor
Replace the protector
The torque of the swing motor is not
enough
The swing fan
does not run.
wrong connection
First, check whether the connection is wrong. If no,
replace the parts
The controller is damaged IC2003 is
damaged, the swing relay can not close,
etc
47
Troubleshooting
In cool, heat mode,
the outdoor unit and
compressor will not
run.
Controller malfunction (IC200 3 b r o k e n , creepage of parallel
capacitor of relay loop,relay is broken etc.)
Change controller
Wire loose or wrong connection
Correctly wire according to the drawing
Improper setting of temperature
Adjust setting temp.
Drainage pipe blocked or broken
Change drainage pipe
Wrap of refrigerant pipe joint is not close
enough.
Re-wrap and make it tight.
Fan of indoor unit contacts other parts.
Adjust fan location.
Foreign object in indoor unit
Take out the foreign object.
Compressor shakes too much.
Adjust support washer of compressor, and
tighten loosen screws.
Touch of pipeline of outdoor unit
Separate the touching pipeline.
Touch of inner plates
1. Tighten connect screw.
2. Stick absorbing clay between plates.
Louver of outdoor unit touched outer
case.
Adjust location of louver.
Abnormal sound inside compressor
Change compressor
Water leakage
Abnormal sound
and shake
48
Troubleshooting
If malfunction occurs,corresponding code will display and the unit will resume normal until protection or
malfunction disappears.
Yellow indicator blinks for once
Yellow indicator blinks for twice
Yellow indicator blinks for 3 times
Compressor stars (normal)
Defrosting (normal display of indoor unit)
Anti-freezing protection (normal
display of indoor unit)
Yellow indicator blinks for 4 times
IPM protection
Yellow indicator blinks for 5 times
Overcurrent protection
Yellow indicator blinks for 6 times
Overload protection
Yellow indicator blinks for 7 times
Exhaust protection
Yellow indicator blinks for 8 times
Overlod protection of compresoor
Indicator display
of outdoor unit
Red indicator blinks for once
Cooling (dehumidify) or heating current
dropped frequency current.
Red indicator blinks for twice
r
Exhaust
temp.
Red indicator blinksfor 3 times
Tube temp.
Red indicator blinks for 4 times
T tube-in
Red indicator blinks for 5 times
Outdoor condenser temp. sensor mal.
Red indicator for 6 times
dropped frequency temp.
dropped frequency temp.
dropped frequency temp.
Outdoor ambient temp. sensor mal.
Red indicator blinks for 7 times
Outdoor exhaust temp. sensor mal.
Red indicator blinks for 8 times
Starting at temp. does not reach
Green indicator does not blink
Communication is abnormal
49
Troubleshooting
Name of running status
Red light
Green light
Indoor unit display
1
Compressor start
Blink once
2
Defrosting
Blink twice
3
Anti-freezing protection
Blink three times
E2
4
IPM protection
Blink four times
H5
5
Overcurrent protection
Blink five times
E5
6
Overload protection
Blink six times
H4
7
Air exhaust protection
Blink seven times
E4
8
Overload protection
Blink eight times
H3
H1
9
Limited frequency (current)
Blink once
10
Limited frequency (Air exhaust)
Blink twice
11
Limited frequency (overload)
Blink three times
12
Limited frequency (anti-freezing)
Blink four times
13
Outdoor unit ambient sensor malfunction
Blink five times
F3
14
Outdoor unit tube temp. sensor malfunction
Blink six times
F4
15
Outdoor air exhaust sensor malfunction
Blink seven times
F5
16
Achieve the temperature of unitstartsup
Blink eight times
17
Communication is normal
18
Communication malfunction
19
Overload sensor malfunction
20
Low voltage protection
Blink twelve times
PL
21
High voltage protection
Blink thirteen times
PH
22
Indoor ambient sensor malfunction
23
Indoor tube temperature sensormalfunction
F2
24
Normal cooling or norminal heating
P1
25
Max. cooling or max. heating
P2
26
Interim cooling or interim heating
P3
27
Min. cooling or Min. heating
P0
YELLOW-LED4
50
Yellow light
Blink continuously
OFF
E6
Blink nine times
H3
F1
GREEN-LED2
RED-LED3
Troubleshooting
Analysis or processing of some of the malfunction display:
1. Compressor discharge protection
Possible reasons: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser;
the system has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage
inside four-way valve causes incorrect operation; malfunction of compressor; malfunction of protection relay;
malfunction of discharge sensor; outdoor temperature too high.
Processing method: refer to the malfunction analysis in the above section.
2. Low voltage over current protection
Possible reas on: Sudden drop of supply voltage.
3. Communication malfunction
Processing method:Ch eck if communica tion signal cable is connected reliably.
4. Sensor openo rs hort circuit
Processing method: Check whether sensor is normal, connected with the corresponding position on the
controller and if damage lf lead wire is found.
5. Compressor overload protection
Possible reasons: insufficient or too much refrigrant; blockage of capillary and increase of suction temp.;
improper running of compressor, burning in or stuck of bearing, damage of discharge valve;
malfunctioning of protector.
Processing method: adjust refrigerant amount; replace the capillary; replace the compressor; use
universal meter to check if the contactor of compressor is fine when it is not overheated, if not replace
the protector.
6. System malfunction
i.e.overload protection.When tube temperature (Check the temperature of outdoor heat exchanger
when cooling and check the temperature of indoor heat exchanger when heating) is too high,
protection will be activated.
Possible reasons: Outdoor temperature is too high when cooling; insufficient outdoor air circulation;
refrigerant flow malfunction.
please refer to the malfunction analysis in the previous section for handling method .
7. IPM module protection
Processing method:Once the module malfunction happens,if it persists for a long time and can not be self- canceled,
cut off the power and turn off the unit,and then re-energize the unit again after about 10 min. After repeating the
procedure for sever times, if the malfunction still exists, replace the module.
51
Troubleshooting
9.4 How to Check simply the main part
Main Check Points:
Units of 115V: Use AC voltmeter to check wether the voltage between terminal L and N on the wiring board is 115V AC
Units of 115V: Whether the reactor ( L) is correctly connected? Whether the connection is loose or fallen? Whether the reactor
(L) is damaged ?
Fault diagnosis process:
Switch on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor (test3)
Voltage higher than 103.5V?
For 115V Units
Voltage higher than 187V?
For 208~230V Units
N
Y
Fault with the
voltage testing
circuit on control panel AP1
Replace the
control panel
AP1
Measure the AC voltage between
terminal L and N on wiring board
XT
Voltage within 103.5~126.5V?
For 115V Units
N
Switch off the
power and repair
the supply power
to restore the voltage to 103.5~126.5
VVAC For 115V
Units
Re-energize
and switch
on the unit
If the fault is
eliminated?
Y
Y
Switch off the power and wait 20 minutes;
or use DC voltmeter to measure the voltage on the use DC voltmeter to measure
the voltage on the two ends of capacitor
(test3), until the voltage is lower than 20V
N
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor L is normal?
N
Connect the reactor L according to
Electrical Wiring
Diagram
Re-energize
and switch on
the unit
Y
Replace the control
panel AP1
End
52
N
If the fault
is eliminated?
Y
Troubleshooting
Mainly detect:
Whether the connection between control panel AP1 and compressor COMP is secure? Whether loose? Whether the connection
is in correct order?
Whether the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage
between terminal L and N on the wiring board XT)
Whether the compressor coil resistance is normal? Whether the insulation of compressor coil against the copper tube
is in good condition?
Whether the working loads of the machine are too high? Whether the radiation is good?
Whether the charge volume of refrigerant is correct?
53
Troubleshooting
Fault diagnosis process:
Energize and
switch on
IPM protection
occurs after the
machine has run for
a period of time?
Y
Use AC voltmeter
to measure the
voltage between
terminal L and N
on the wiring
board XT)
If the voltage
between terminal L
and N on wiring
board XT is within
210VAC~250VAC?
N
Check the supply
voltage and
restore it to
210VAC~250VAC
Y
Start and run the
unit. Before
protection occurs,
use DC voltmeter to
measure the voltage
between the two
ends of electrolytic
capacitor on control
panel AP1 (test3)
Voltage between
the two ends of
electrolytic
capacitor (test3) is
higher than 250V
Y
Please confirm:
1. If the indoor and
outdoor heat
exchangers are
dirty? If they are
obstructed by other
objects which affect
the heat exchange
of indoor and
outdoor unit.
2. If the indoor and
outdoor fans are
working normally?
3. If the environment
temperature is too
high, resulting in
that the system
pressure is too high
and exceeds the
permissible range?
4. If the charge
volume of
refrigerant is too
much, resulting in
that the system
pressure is too
high?
5. Other conditions
resulting in that the
system pressure
becomes too high.
The connection
of capacitor C2
is loose.
Stop the unit and
disconnect the power
supply. Wait 20 minutes,
or use DC voltmeter to
measure the voltage
between the two ends of
capacitor C2, until the
voltage is lower than 20V
If capacitor
C2 is failed?
Replace the capacitor
C2. Then, energize
and start the unit.
Y
Replace the
control panel AP1
N
If there is any
abnormality
described above?
Y
Replace the
control panel AP1
Y
Connect the control panel
AP1 and compressor
COMP correctly according
to the Electrical Wiring
Diagram. Then, energize
and start the unit.
If the
resistance is
normal?
N
If the unit can
work
normally?
Replace the
compressor
COMP
Resistance higher
than 500MΩ?
N
Replace the
control panel
AP1
END
54
N
If the unit can
work
normally?
If the unit can
work
normally?
Y
Y
N
Take corrective actions
according to Technical
Service Manual, and
then energize and start
the unit.
N
Use ohmmeter to
measure the resistance
between the two
terminals of compressor
COMP and copper tube.
Y
Reconnect the
capacitor C2 according
to Electrical Wiring
Diagram. Then,
energize and start the
unit.
Y
N
Remove the wires
on the two ends of
capacitor C2. Then,
use
capacitance
meter to measure
the capacitor C2.
Verify as per the
Parameters Sheet.
N
Use ohmmeter to
measure the resistance
between the three
terminals on compressor
COMP, and compare the
measurements with the
compressor resistance on
Service Manual.
If the unit can
work
normally?
N
Stop the unit and
disconnect the power
supply. Then, check
the connection of
capacitor C2
according to Electrical
Wiring Diagram.
Refer to the
Electrical Wiring
Diagram and check
if the connection
between AP1 and
COMP is loose and if
the connection order
is correct.
If the connection
between AP1 and
COMP is unsecure
or the connection
order is wrong?
N
If the unit can
work
normally?
N
Y
Y
55
Troubleshooting
Mainly detect:
Is outdoor ambient temperature in normal range?
Are the outdoor and indoor fans operating normally?
Is the heat dissipation environment inside and outside the unit is good?
Overheat and high
temperature protection
Y
Is outdoor ambient temperature higher than 53?
Normal protection, please operate it after the
outdoor ambient temperature is normalized.
N
20 minutes after the complete
unit is powered off.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
Y
Improve the heat
dissipation environment
of the unit
N
Does the outdoor fan work normally?
N
1. Check if the fan terminal O FAN
is connected correctly
2. Resistance between any two
terminals is measure by an ohm
gauge and should be less than 1K
Ohm.
Y
Replace the fan
capacitor C1
Replace the control panel
AP1
Replace the
outdoor fan
End
56
Troubleshooting
Mainly detect:
Whether the compressor wiring is connected correct?
Is time for compressor stopping enough?
Is compressor broken?
Power on the unit
Is stop time of the compressor
longer than 3 minutes?
N
Restart it up after 3 minutes
Y
Does startup fail?
Y
Are the wires for the compressor connected
correctly? Is connection sequence right?
N
Connect the wires as per the
connection diagram
Y
Replace the control panel AP1
N
If the fault is eliminated?
N
Replace the
compressor
Y
End
57
Troubleshooting
Mainly detect:
Whether the unit voltage is too high?
Whether the work voltage is too low?
Out of step occurs once the
unit is powered on.
Out of step occurs in
operation
Is stop time of the
compressor longer than
3 minutes?
Is the outdoor fan working
normally?
Is the outdoor unit blocked
by foreign objects?
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
direction?
Replace the
control panel AP1
Connect the
wires correctly
Replace the control
panel AP1
If the fault is eliminated?
If the fault is eliminated?
Replace the
compressor
Replace the
compressor
End
End
58
Check if the fan terminal
O FAN is connected correctly
Replace the fan
capacitor C1
Replace the
outdoor fan
Remove foreign objects
Troubleshooting
Mainly detect:
Whether the electronic expansion valve is connected well or not? Is electronic expansion valve damaged?
Is refrigerant leaked?
20 minutes after the
complete unit is
powered off
Is the terminal FA for the
electronic expansion valve
connected correctly?
Connect the
wires correctly
Resistances between the first four pins
close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.
Replace the electronic
expansion valve
If the fault is eliminated?
Replace the
control panel
AP1
If the fault is eliminated?
Coolant leakage, refilling
the coolant
End
59
Troubleshooting
Mainly detect:
Check if the reactor (L) of the outdoor unit and the PFC capacitor are broken
The failure diagnosis process is as follows:
Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any
damage or
short-circuit?
Y
Replace it as per the
wiring diagram and
reconnect the wires
If the fault is eliminated?
N
Remove the PFC capacitor
and measure resistance
between the two terminals.
Is the resistance around zero?
N
Y
The capacitor is
short circuited and
the capacitor
should be replaced
Restart the unit
If the fault is eliminated?
Y
N
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohm gauge
Whether there is any damage
or short-circuit?
N
Y
Replace the reactor
Restart the unit
If the fault is eliminated?
Y
N
Replace the control
panel AP1
N
Y
End
60
Troubleshooting
Mainly detect:
Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect
well or not, if is there any damage?
Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?
The flow chart for malfunction detect:
Start
Y
Did the equipment operate
normally before the failure
occurs?
N
Check the wiring of the indoor and
outdoor units with reference to the
wiring diagram
Check wiring inside of
the indoor and outdoor
units
Y
Is the connection right?
N
N
The AP1 voltage
detection circuit
is at fault
Y
Correctly connect the
corresponding wires for
the indoor and outdoor
units with reference to
the wiring diagram
Are wires broken?
N
If the fault is eliminated?
N
Check the communication
circuit of the outdoor unit
If the fault is eliminated?
The communication
circuit is abnormal
Y
N
Replace the main board
˄AP1˅of the outdoor unit
If the fault is eliminated?
N
Replace the main board
of the indoor unit
Y
Y
End
Y
61
Troubleshooting
Start
Measure voltage at the
Test 10 position as
shown in the diagram
with a voltmeter
Value jumping
N
Y
Measure voltage at the
Test 15 position as
shown in the diagram
with a voltmeter
Y
Value jumping
N
Y
Fault with
outdoor unit
Measure voltage at the
Test 11 position as
shown in the diagram
with a voltmeter
Value jumping
N
Y
Measure voltage at the
Test 12 position as
shown in the diagram
with a voltmeter
N
Value jumping
Y
The communication
circuit of the outdoor
unit is normal
62
End
Troubleshooting
(9) Flow chart for outdoor communitcation circuit detecting:
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YDULDEOH2WKHUZLVHLWPLJKWEHPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRUPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLWRU
ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW3OHDVHHQVXUHWKDWWKHUHLVQRPDOIXQFWLRQRIPDLQERDUGRILQGRRUXQLWRU
ZURQJZLUHFRQQHFWLRQRILQGRRUDQGRXWGRRUXQLW$IWHUUHPRYLQJWKHPDOIXQFWLRQRILQGRRUXQLWUHPRYHWKHPDOIXQFWLRQRI
RXWGRRUXQLW
7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KHYROWDJHVKRXOGEH
YDULDEOH7HVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KH
YROWDJHVKRXOGEHYDULDEOH7HVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW
7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI57KHYROWDJHVKRXOG
EHYDULDEOHWHVW7HVWWKHYROWDJHRISLQDQGSLQRI8ZLWKXQLYHUVDOPHWHUYROWDJHRIERWKVLGHVRI&7KH
YROWDJHVKRXOGEHYDULDEOHWHVW2WKHUZLVHWKHUHLVPDOIXQFWLRQRIPDLQERDUGRIRXWGRRUXQLW
7HVWWKHYROWDJHEHWZHHQSLQRI5ZKLWHDQGSLQRI87KHYROWDJHVKRXOGEHYDULDEOH7HVWYROWDJHEHWZHHQ
SLQRI5ZKLWHDQGSLQRI8ZLWKXQLYHUVDOPHWHU7KHYROWDJHVKRXOGEHYDULDEOH2WKHUZLVHWKHUHLVPDOIXQFWLRQRI
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63
Troubleshooting
Troubleshooting Guide
Appendix 1: form for indoor/outdoor unit's ambient sensor numerical value of resistance
Temp.
Resistance
Temp.
(°F)
(°F)
-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66
68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136
64
Resistance
Temp.
(°F)
138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207
Resistance
Temp.
(°F)
208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277
Resistance
Troubleshooting
Troubleshooting Guide
Appendix 2: form for indoor/outdoor unit's tube temperature sensor numerical value of resistance
Temp.
Resistance
Temp.
Resistance
Temp.
(°F)
(°F)
(°F)
-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66
68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136
138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207
Resistance
Temp.
(°F)
Resistance
208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277
65
Troubleshooting
Troubleshooting Guide
Appendix 3: form for indoor/outdoor unit's air exhaust temperature sensor numerical value of resistance
Temp.
Resistance
Temp.
Resistance
Temp.
Resistance
Temp.
(°F)
(°F)
(°F)
(°F)
-2
0
1
3
5
7
9
10
12
14
16
18
19
21
23
25
27
28
30
32
34
36
37
39
41
43
45
46
48
50
52
54
55
57
59
61
63
64
66
68
70
72
73
75
77
79
81
82
84
86
88
90
91
93
95
97
99
100
102
104
106
108
109
111
113
115
117
118
120
122
124
126
127
130
131
133
135
136
138
140
142
144
145
147
149
151
153
154
156
158
160
162
163
165
167
169
171
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
199
202
203
205
207
208
210
212
214
216
217
219
221
223
225
226
228
230
232
234
235
237
239
241
243
244
246
248
250
252
253
255
257
259
261
262
264
266
268
270
271
273
275
277
66
Resistance
Troubleshooting
9.5 2-way, 3-way Valve Appearance
2-way Valve (Liquid Side)
Hexagonal wrench (4mm)
Flare nut
3-way Valve (Gas Side)
Valve cap
Open position
Flare nut
Closed position
Open position
Closed position
To
piping
connection
To
piping
connection
To outdoor unit
Works
Shipping
1.
Air purging
(Installation)
Operation
Pin
Service Service
port cap port
To outdoor unit
Shaft position
Shaft position
Service port
Closed
(with valve cap)
Closed
(with valve cap)
Closed
(with cap)
Closed
(clockwise)
Closed
(clockwise)
Open
(with vacumm pump)
Open
(with valve cap)
Open
(with valve cap)
Closed
(with cap)
Closed
(clockwise)
Open
Open
(counter-clockwise) (connected manifold
gauge)
2.
Pumping down
(Transfering)
Evacuation
(Servicing)
Open
Open
3.
Open
(with charging
cylinder)
Gas charging
(Servicing)
Open
Open
4.
Open
(with charging
cylinder)
5.
Pressure check
(Servicing)
Open
Open
Open
(with charging cylinder)
6.
Gas releasing
(Servicing)
Open
Open
Open
(with charging cylinder)
67
Troubleshooting
Liquid side
Indoor unit
Clsed
Outdoor unit
2-way
valve
Gas side
Clsed
3-way
valve
Vacuum pump
Lo
OPEN
CLOSE
* Procedure
(1)Connect the charge hose from the manifold valve to the service port of the gas side packed valve.
(2)Connect the charge hose to the port of the vacuum pump.
(3) Open fully the low pressure side handle of the gauge manifold valve.
(4)Operate the vacuum pump to begin evacuating. Perform
evacuating for about 15 minutes if the piping length is 20 meters
(15 minutes for 20 meters) (assuming a pump capacity of 27
liters per minute). Confirm that the compound pressure gauge
reading is –101 kPa (–76 cmHg).
(5)Close the low pressure valve handle of gauge manifold.
– Check the flare connections for gas leakage.
(6)Use torque wrench to tighten the service port nut to a torque
of 1.8kg.cm.
(7)Set the 3-way valve to the back seat.
(8)Mount the valve stem nuts to the 2-way and 3-way valves.
(9)Check for gas leakage.
– At this time, especially check for gas leakage from the 2-way
and 3-way valve’s stem nuts, and from the service port nut.
68
CAUTION:
If gas leakage are discovered in step 5 above, take the
following mesures :
If the gas leaks stop when the piping connections are
tightened further, continue working from step 6. If the
gas leaks do not stop when the connections are
retightened, repair the location of the leak, discharge
all of the gas through the service port, and then recharge
with the specified amount of gas from a gas cylinder.
Troubleshooting
Liquid side
Indoor unit
2-Way
valve
Open
Outdoor unit
Gas side
Closed
3-Way
valve
Lo
CLOSE
CLOSE
Purge the air
• Procedure
(1) Confirm that both the 2-way and 3-way valves are set to
the open position.
– Remove the valve stem caps and confirm that the valve stems
(7) Immediately set the 3-way valve to the closed position.
– Do this quickly so that the gauge ends up indicating 3 to 5kg/
cm2g.
are in the raised position.
– Be sure to use a hexagonal wrench to operate the valve stems.
(8) Disconnect the charge set, and mount the 2-way and 3(2) Operate the unit for 10 to 15 minutes.
way valve’s stem nuts and the service port nut.
– Use torque wrench to tighten the service port nut to a torque of
1.8 kg.m.
– Be sure to check for gas leakage.
(3) Stop operation and wait for 3 minutes, then connect the
charge set to the service port of the 3-way valve.
– Connect the charge hose with the push pin to the service port.
(4) Air purging of the charge hose.
– Open the low-pressure valve on the charge set slightly to air
purge from the charge hose.
(5) Set the 2-way valve to the closed position.
(6) Operate the air conditioner at the cooling cycle and stop it
when the gauge indicates 1kg/cm2g.
69
Troubleshooting
Liquid side
Indoor unit
3-Way
valve
Closed
Outdoor unit
Gas side
Closed
3-Way
valve
Gas cylinder
Lo
R410A
OPEN
CLOSE
• Procedure
(1) Confirm that both the liquid side valve and the gas side
valve are set to the closed position.
(6) Disconnect the charge set and the gas cylinder, and set
the Liquid side and Gas side valves to the open position.
– Be sure to use a hexagonal wrench to operate the valve stems.
(2) Connect the charge set and a gas cylinder to the service
port of the Gas side valve.
– Leave the valve on the gas cylinder closed.
(8) Mount the valve stem nuts and the service port nut.
– Use torque wrench to tighten the service port nut to a torque of
1.8 kg.m.
– Be sure to check for gas leakage.
(3) Air purging.
– Open the valves on the gas cylinder and the charge set. Purge
the air by loosening the flare nut on the liquid side valve approximately 45o or 3 seconds then closing it for 1 minute;repeat
3 times.
– After purging the air, use a torque wrench to tighten the flare
nut on liquid side valve.
(4) Check for gas leakage.
– Check the flare connections for gas leakage.
(5) Discharge the refrigerant.
– Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 3 to 5 kg/cm2g.
70
CAUTION: Do not leak the gas in the air during Air Purging.
Troubleshooting
Balance Refrigerant of the 3-way Valve
(Gas leakage)
Liquid side
Indoor unit
Outdoor unit
3-Way
valve
Open
Gas side
3-Way
valve
Open
Lo
OPEN
CLOSE
• Procedure
(1) Confirm that both the 2-way and 3-way valves
are set to the back seat.
(2) Connect the charge set to the 3-way valve’s
port.
– Leave the valve on the charge set closed.
– Connect the charge hose to the service port.
(3) Open the valve (Lo side) on the charge set and
discharge the refrigerant until the gauge indicates 0 kg/cm2G.
– If there is no air in the refrigerant cycle (the
pressure when the air conditioner is not running
is higher than 1 kg/cm2G), discharge the refrigerant until the gauge indicates 0.5 to 1
kg/cm2G. if this is the case, it will not be necessary to apply a evacuatin.
– Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will
also be discharged.
71
Troubleshooting
Evacuation
(All amount of refrigerant leaked)
Liquid side
Indoor unit
Outdoor unit
3-Way
valve
Open
Gas side
3-Way
valve
Open
Vacuum pump
Lo
OPEN
CLOSE
• Procedure
(1) Connect the vacuum pump to the center hose
of charge set center hose
(2) Evacuation for approximately one hour.
– Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or less).
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approximately 5 minutes after turning off the vacuum
pump).
(4) Disconnect the charge hose from the vacuum
pump.
– Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
72
Troubleshooting
Gas Charging
(After Evacuation)
Liquid side
Indoor unit
3-Way
valve
Open
Outdoor unit
Gas side
Open
3-Way
valve
Check valve
Charging
cylinder
Lo
(1)
OPEN
CLOSE
• Procedure
\
(1) Connect the charge hose to the charging
cylinder.
– Connect the charge hose which you dis-connected from the vacuum pump to the valve at
the bottom of the cylinder.
– If you are using a gas cylinder, also use a
scale and reverse the cylinder so that the system can be charged with liquid.
(2) Purge the air from the charge hose.
– Open the valve at the bottom of the cylinder
and press the check valve on the charge set to
purge the air. (Be careful of the liquid refrigerant). The procedure is the same if using a gas
cylinder.
(3) Open the valve (Lo side on the charge set and
charge the system with liquid refrigerant.
– If the system can not be charged with the specified amount of refrigerant, it can be charged
with a little at a time (approximately 150g each
time) while operating the air conditioner in the
cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then
repeat the procedure (pumping down-pin).
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
– Stopping partway will allow the gas to be discharged.
– If the system has been charged with liquid
refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.
(5) Mount the valve stem nuts and the service
port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
73
Removal Procedure
10. Removal Procedure
10.1 Removal Procedure of Indoor Unit
Warning
Be sure to wait 10 minutes or more after turning
off all power supplies before disassembling work.
Image shown here is indicative only. Actual product
you receive may differ.
front panel
1. Remove front panel
Open the front panel and slightly pull it to remove it.
filter
2. Remove guide louver
Push out the shaft sleeve and slightly bend the
guide louver to remove it.
guide louver
3. Remove electirc box cover
Unscrew the screw fixing the electric box cover to
remove it.
screw
74
Removal Procedure
clasps
temp. sensor
4. Remove front case
Unscrew the 6 tapping screws fixng the front panel
and turn the front case backward to remove it.
screws
clasps
5. Remove electric box
Unscrew the 2 screws fixing the electric box
Pull out the wiring terminal of motor and then un-
screw
screw the 3 screws fixing electric box.Lift the electric box to remove it.
6. Remove evaporator
Unscrew the screws on the rear pipe cardplate
and then remove the cardplate.
screw
clasp
75
Removal Procedure
screws
7. Remove motor and cross flow fan
Unscrew the screws fixing the motor press plate
of motor and then the screws connecting the motor and cross flow fan to separate and remove
them.
screws
screw
76
Removal Procedure
10.2 Removal Procedure of Outdoor Unit
Cable Cross Plate sub-assy
1. Remove top cover and the Cable Cross Plate subassy Unscrew the screw on the handle and pull the
Cable Cross Plate sub-assy forcibly downwards to re-
top cover
move it. Unscrew the 3 screws fixing the top cover to
remove it.
screws
2. Remove cabinet
screws
Unscrew the 4 screws fixing the cabinet to remove it.
cabinet
3. Remove front panel
Unscrew the 5 screws fixing the front panel and
pull out the front panel to remove it.
(If it's 108-230V, there are 6 screws need to be unscrewed
because there are one more power transformer.)
front panel
screws
77
Removal Procedure
4. Remove electric box cover
Unscrew the 2 screws fixing the electiric box. Pull
theelectric box upwards and unplug the plug-in
line to remove the electric box.
screws
5. Remove axial flow fan
Unscrew the nut and remove the washer fixing the
axial flow fan and then pull it out.
nut and washer
axial flow fan
6.Remove 4-way valve
Wrap the 4-way valve with wet cloth and unsolder
the 4 weld spots of the 4-way valve to remove it.
4-way valve
weld spots
78
Removal Procedure
7. Remove electronic expannsion valve
Unsolder the weld spots of eletronic expansion
valve connecting with other pipelines to remove it.
electronic expannsion valve
8. Remove gas valve and liquid valve
Unscrew the 2 screws fixing the gas valve and
unsolder the weld spots of gas valve and suction
pipe to remove the gas valve.
Unscrew the 2 screws fixing the liquid valve and
liquid valve
screws
unsolder the weld spots of liquid valve and suction pipe to remove the liquid valve.
gas valve
9 . Remove compressor
Unsolder the 2 weld spots of the compressor and
unscrew the 3 feet nuts and remove the washeres fixing the compressor to remove it.
compressor foot
79
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED
SYSTEM COMPONENTS
27
25
40
1
41
2
3
5
39
4
38
6
7
13
8
37
9
14
12
36
10
15
35
29
34
33
32
16
31
11
30
28
17
18
24
22
26
19
23
21
20
MW09C1H / MW12C1H Exploded Diagram
80
MW09C1H Parts List
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
FPN
69700100
69700101
69700102
69700103
69700104
69700105
69700106
69700107
69700108
69700109
69700110
69700111
69700112
69700113
69700114
69700115
69700116
69700117
69700118
69700119
69700120
69700121
69700122
69700123
69700124
69700125
69700126
69700127
69700128
69700129
69700130
69700131
69700132
69700133
69700134
69700135
69700136
69700137
69700138
69700139
69700140
Part Description
Filter Sub-Assy
Front Case Sub-Assy
Front Case
Evaporator Assy
Evaporator Support
Guide Louver
Axile Bush (guide louver)
Rear Grill
Helicoid tongue
Air Louver 2
Air Louver 1
Left Axile Bush
Bearing cushion rubber base
O-Gasket sub-assy of Bearing
Cross Flow Fan
Water Tray Glue Plug
Wall Mounting Frame
MotorPressPlate
Pipe Clamp
Drainage Pipe
Cable Cross Plate
Rear Case assy
Fan Motor
Motor MP24AA
Crank
Display Board
Ambient Temperature Sensor
Transformer
Electric Box Assy
Electric Box
4-bit Terminal Board
Main Board
Jumping Connector
Tube Sensor (20K black)
Electric Box Cover1
Shield cover of Electric Box sub-assy
Remote Control
Electric Box Cover2
Screw Cover
Front panel D1
Front Panel Sub-Assy
81
MW12C1H Parts List
82
NO.
1
2
3
4
5
6
7
FPN
69700100
69700141
69700142
69700103
69700104
69700105
69700106
Part Description
Filter Sub-Assy
Front Case Sub-Assy
Front Case
Evaporator Assy
Evaporator Support
Guide Louver
Axile Bush (guide louver)
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
69700108
69700109
69700110
69700111
69700112
69700113
69700114
69700115
69700116
69700117
69700118
69700119
69700120
69700121
69700122
69700123
69700124
69700125
69700126
69700127
69700143
69700129
69700130
69700131
69700144
69700133
69700134
69700135
69700145
69700137
69700138
69700139
69700140
Helicoid tongue
Air Louver 2
Air Louver 1
Left Axile Bush
Bearing cushion rubber base
O-Gasket sub-assy of Bearing
Cross Flow Fan
Water Tray Glue Plug
Wall Mounting Frame
MotorPressPlate
Pipe Clamp
Drainage Pipe
Cable Cross Plate
Rear Case assy
Fan Motor
Motor MP24AA
Crank
Display Board
Ambient Temperature Sensor
Transformer
Electric Box Assy
Electric Box
4-bit Terminal Board
Main Board
Jumping Connector
Tube Sensor (20K black)
Electric Box Cover1
Shield cover of Electric Box sub-assy
Remote Controller
Electric Box Cover2
Screw Cover
Front panel D1
Front Panel Sub-Assy
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED
SYSTEM COMPONENTS
10
11
12
13
14
1
31
30
29
28
3
2
4
5
27
25
6
26
21
7
8
20
24
19
9
16
15
17
18
22
23
MR09C1H Exploded Diagram
83
MR09C1H Parts List
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
84
FPN
69700000
69700001
69700002
69700003
69700004
69700005
69700006
69700007
69700008
69700009
69700010
69700011
69700012
69700013
69700014
69700015
69700016
69700017
69700018
69700019
69700020
69700021
69700022
69700023
69700024
69700025
69700026
69700027
69700028
69700029
69700030
Part Description
Mesh Enclosure
Cabinet
Axial-flow Fan
Motor FW30G-ZL
Reactor Support Assy
Choke Plug
Compressor Gasket
Compressor C-6RZ110H1A
Electric Expansion Valve Sub-Assy
Cut-off Valve (1/4)
Cut-off Valve (3/8)
Valve Support
Cable Cross Plate Assy
Right Side Plate Assy
Wire cover
Magnet Coil
Temperature Sensor for Discharge Gas
Tube Sensor (20K black)
Discharge Tube
Inhalation Tube
Overload Protector
Sensor
Rear Grill
Condenser Assy
Clapboard Sub-Assy
Top Cover Plate
Motor suport spot welding sub-assy
Electric box cover sub-assy
Main Board
Electric Box Assy
Terminal Board
SPLIT TYPE ROOM AIR CONDITIONER - WALL MOUNTED
SYSTEM COMPONENTS
3
6
1
5
7
4
9
2
8
10
25
13
24
15
26
23
22
16
21
12
11
20
14
19
17
27
18
MR12C1H Exploded View
85
MR12C1H Parts List
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
86
FPN
69700000
69700031
69700002
69700003
69700017
69700016
69700021
69700032
69700033
69700019
69700025
69700034
69700035
69700015
69700036
69700011
69700027
69700029
69700020
69700006
69700037
69700010
69700009
69700007
69700038
69700039
69700028
Part Description
Mesh Enclosure
Front Panel
Axial-flow Fan
Motor FW30G-ZL
Tube Sensor (20K black)
Temperature Sensor for Discharge Gas
Sensor
Motor suport spot welding sub-assy
Condenser Assy
Inhalation Tube
Top Cover Plate
Rear Grill
Discharge Tube
Magnet Coil
Right Side Plate
Valve Support
Electric box cover sub-assy
Electric Box Assy
Overload Protector
Compressor Gasket
Drainage Plug
Cut-off Valve (3/8)
Cut-off Valve (1/4)
Compressor C-6RZ110H1A
Clapboard Sub-Assy
Chassis Sub-assy
Main Board
FRIEDRICH AIR CONDITIONING CO.
10001 Reunion Place, Ste. 500, San Antonio, TX 78216
(210) 546-0500 877-599-5665 x 261 FAX (210) 546-0630
Email: tac@friedrich.com
www.friedrich.com
Printed in the U.S.A.