Order No. MAC0502032C8
Air Conditioner
CS-E15DB4EW CU-E15DBE
CS-E18DB4EW CU-E18DBE
CS-E21DB4ES CU-E21DBE
CONTENTS
Page
1 Features
2
2 Functions
Page
4.2. Outdoor Unit
13
3
5 Refrigeration Cycle Diagram
14
2.1. Remote Control
3
6 Block Diagram
15
2.2. Indoor Unit
4
7 Wiring Diagram
16
2.3. Outdoor Unit
5
8 Operation Details
17
3 Product Specifications
6
3.1. CS-E15DB4EW CU-E15DBE
6
3.2. CS-E18DB4EW CU-E18DBE
8
3.3. CS-E21DB4ES CU-E21DBE
10
4 Dimensions
4.1. Indoor Unit & Remote Control
8.1. Basic Operation
17
8.2. Protection Control Features
28
9 Operating Instructions
10 Installation And Servicing Air Conditioner Using R410A
34
42
12
10.1. Outline
42
12
10.2. Tools For Installing/Servicing Refrigerant Piping
43
© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
10.3. Refrigerant Piping Work
47
10.4. Installation, Transferring, Servicing
49
11 Installation Instructions
53
11.2. Indoor Unit
55
11.3. Outdoor Unit
62
79
14.2. CZ-BT20E (Front Grille Complete)
81
15 Replacement Parts List (Indoor Unit)
53
11.1. Safety Precautions
14.1. CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
82
15.1. CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
82
15.2. CZ-BT20E (Front Grille Complete)
83
16 Exploded View (Outdoor Unit)
16.1. CU-E15DBE CU-E18DBE CU-E21DBE
84
84
12 Servicing Information
66
12.1. Troubleshooting
66
12.2. Breakdown Self Diagnosis Function
68
12.3. Remote Control
70
12.4. Auto OFF/ON Button
71
18.1. Indoor Unit
86
12.5. Disassembly of Parts
72
18.2. Outdoor Unit
90
75
18.3. Remote Control
95
13.1. Operation Characteristics
75
18.4. Print PatternIndoor Unit Printed Circuit Board
96
13.2. Sensible Capacity Chart
78
18.5. Print PatternOutdoor Unit Printed Circuit Board View
97
13 Technical Data
14 Exploded View (Indoor Unit)
17 Replacement Parts List (Outdoor Unit)
17.1. CU-E15DBE CU-E18DBE CU-E21DBE
18 Electronic Circuit Diagram
79
1 Features
• Product
• Serviceability Improvement
− Four modes of operation selection
− Removable and washable Intake Grille
− Powerful Mode operation
− Breakdown Self Diagnosis function
− 24-Hour Real Time Timer Control
− Quiet Mode Operation
• Environmental Protection
− Discharged air can be swung automatically or manually
by remote control
− Non-ozone-depletion substances refrigerant (R410A)
− Air filter with function to reduce dust and smoke.
• Quality Improvement
− Gas leakage detection
− Deice operation
− Auto restart control
2
85
85
86
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
2 Functions
2.1.
Remote Control
FAN
SPEED
AUTO
HEAT
COOL
DRY
OFF
OFF
ON
TIMER TIMER
OFF/ON
MODE
FAN SPEED
POWERFUL
AUTO
TEMP
QUIET
AIR SWING
MANUAL
TIMER
ON
1
SET
2
3
CANCEL
OFF
CHECK
CLOCK
RESET
INVENTER
TEMP
OFF / ON I
Operation OFF / ON
MODE
Room Temperature Setting
• Increase or decrease set temperature.
(16°C to 30°C)
Operation Mode Selection
•
•
•
•
POWERFUL
AUTO
HEAT
COOL
DRY
Automatic Operation
Heating Operation
Cooling Operation
Soft Dry Operation
TIMER-ON
TIMER-OFF
Timer Setting
• 24-hour, OFF / ON Real Timer Setting.
Powerful Mode Operation
Time / Timer Setting
• Hours and minutes setting.
QUIET
Quiet Mode Operation
AIR SWING
SET
CANCEL
Airflow Direction Control
•
AUTO
• MANUAL
Timer Operation Set / Cancel
• ON Timer and OFF Timer setting and
cancellation.
Vertical Automatic Airflow
Direction Control.
Vertical Manual Airflow
Direction Control.
CLOCK
Clock Setting
• Current time setting.
FAN SPEED
Indoor Fan Speed Selection
•
•
•
•
•
•
AUTO
CHECK
Low
MediumMedium
Medium+
High
Automatic Fan Speed
Check Point
• Breakdown self diagnosis function.
RESET
Reset Point
• Clear memory data.
3
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2.2.
Indoor Unit
Quiet Mode
Automatic Operation Switch
• To provide quiet operation.
• To run automatic operation, force cooling or
heating operation, or change remote control
signal type.
24-Hour Real Time Timer Control
Operation Indication Lamps (LED)
•
•
•
•
•
Automatic Restart Control
(Green) ........ Lights up in operation,
blinks in Automatic
Operation Mode judging,
deice, On Timer sampling
and Hot Start operation.
TIMER
(Orange) ...... Lights up in Timer Setting.
Blinks in Self Diagnosis
Control.
QUIET
(Orange) ...... Lights up in Quiet Mode
Operation.
POWERFUL (Orange) ... Lights up when Powerful
Mode is selected.
AIR SWING (Orange) .... Lights up in Auto Air
Swing.
POWER
• Operation is restarted after power failure at
previous setting mode.
Microcomputer-controlled Room
Temperature Control
Breakdown Self Diagnosis Function
Low Pressure Control
(Gas Leakeage Detection)
Indoor Power Relay Control
Anti-Dew Formation Control
Four Operation Modes
• Automatic, Heating, Cooling and Soft Dry
Operation.
Anti Freezing Control
Anti-Cold Draft Control
Automatic and 5 Manual Indoor
Fan Speeds
Hot Start
Airflow Direction Control
Intake Air Temperature Control
• Vertical discharged air can be swung
automatically or manually by remote control.
• Horizontal discharged air can be adjusted by
hand.
High Pressure Control
Deodorizing Control
Powerful Mode
• For quick cooling or heating.
Deice Operation
4
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2.3.
Outdoor Unit
Time Delay Safety Control
30 seconds Forced Operation
Overload Protection Control
Total Running Current Control
Compressor Overheating
Prevention Control
IPM (Power Transistor)
Overheating Protection Control
Low Operation Frequency
Protection Control
Mininum Operation Frequency
Protection Control
Outdoor Air Temperature
Control
Standby Control
Deice Operation
5
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3 Product Specifications
3.1.
CS-E15DB4EW CU-E15DBE
Unit
CS-E15DB4EW
CU-E15DBE
Cooling Capacity
kW
kcal/h
BTU/h
4.10 (0.90 - 4.80)
3,530 (770 - 4,130)
14,000 (3,070 - 16,400)
Heating Capacity
kW
kcal/h
BTU/h
5.10 (0.90 - 6.20)
4,390 (770 - 5,330)
17,400 (3,070 - 21,100)
Moisture Removal
l/h
Pint/h
2.3
(4.9)
ø
V
Hz
Single
230 - 240
50
Power Source (Phase, Voltage, Cycle)
Airflow Method
OUTLET
SIDE VIEW
TOP VIEW
INTAKE
Air Volume
Lo
m3/min (cfm)
Cooling; 7.5 (260)
Heating; 9.0 (320)
—
Me
m3/min (cfm)
Cooling; 9.0 (320)
Heating; 10.1 (360)
—
Hi
m3/min (cfm)
Cooling; 10.5 (370)
Heating; 10.8 (380)
Cooling; 46.8 (1,650)
Heating; 48.5 (1,710)
dB (A)
Cooling; High 34, Low 26
Heating; High 35, Low 28
Cooling; 45
Heating; 47
Power level dB
Cooling; High 47
Heating; High 48
Cooling; High 58
Heating; High 60
Noise Level
Electrical Data
Input Power
W
Cooling; 1,300 (255 - 1,710)
Heating; 1,770 (260 - 2,180)
Running Current
A
Cooling; 6.0 - 5.9
Heating; 8.0 - 7.9
EER
COP
Starting Current
Piping Connection Port
(Flare piping)
W/W
BTU/hW
W/W
BTU/hW
A
inch
inch
6
Cooling; 3.15 (3.53 - 2.81)
Cooling; 10.8 (12.0 - 9.6)
Heating; 2.88 (3.46 - 2.84)
Heating; 9.8 (11.8 - 9.7)
8.0
G ; Half Union 1/2”
G ; 3-way valve 1/2”
L ; Half Union 1/4”
L ; 2-way valve 1/4”
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
Pipe Size
(Flare piping)
Drain
Hose
Power Cord Length
Number of core-wire
Dimensions
Inner diameter
Length
Height
Width
Depth
Net Weight
Compressor
Motor
Rated
Air Circulation
Motor
Fan Speed
Heat Exchanger
Unit
inch
inch
mm
m
CS-E15DB4EW
G (gas side) ; 1/2”
L (liquid side) ; 1/4”
30
0.193
——
inch (mm)
inch (mm)
inch (mm)
lb (kg)
Type
Type
Output
Type
Material
Type
Rate Output
Lo (Cool/Heat)
Me (Cool/Heat)
Hi (Cool/Heat)
W
W
rpm
rpm
rpm
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W × H × L)
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R410A)
Thermostat
Protection Device
mm
(cm3)
kg (oz)
CU-E15DBE
G (gas side) ; 1/2”
L (liquid side) ; 1/4”
—
—
—
—
10 - 1/4 (260)
29 - 17/32 (750)
22 - 5/8 (575)
34 - 7/16 (875)
22 - 5/8 (575)
13 - 19/32 (345)
40 (18)
106 (48)
—
Involute scroll
—
Brushless (4-pole)
—
900
Backward Fan
Propeller Fan
ABS + GF 10%
P.P
DC Brushless Motor (8-poles)
Transistor (8-poles)
40
40
400 / 480
—
480 / 540
—
560 / 600
640 / 660
Evaporator
Condenser
Copper
Copper
Aluminium (Pre Coat)
Aluminium
Slit Fin
Corrugated Fin
(Plate fin configuration, forced draft)
2 / 10
1 / 28
18
18
1,330 × 210 × 25.4
871.7 × 711.2 × 22
1,270
—
Expansion Valve
—
RB68A (400)
—
1.23 (43.4)
Electronic Control
—
Electronic Control
Electronic Control
• Specifications are subjected to change without notice for further improvement.
7
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
3.2.
CS-E18DB4EW CU-E18DBE
Unit
CS-E18DB4EW
CU-E18DBE
Cooling Capacity
kW
kcal/h
BTU/h
4.80 (0.90 - 5.70)
4,130 (770 - 4,900)
16,400 (3,070 - 19,400)
Heating Capacity
kW
kcal/h
BTU/h
5.60 (0.90 - 7.10)
4,820 (770 - 6,110)
19,100 (3,070 - 24,200)
Moisture Removal
l/h
Pint/h
2.6
(5.5)
ø
V
Hz
Single
230 - 240
50
Power Source (Phase, Voltage, Cycle)
Airflow Method
OUTLET
SIDE VIEW
TOP VIEW
INTAKE
Air Volume
Lo
m3/min (cfm)
Cooling; 8.0 (280)
Heating; 9.1 (320)
—
Me
m3/min (cfm)
Cooling; 9.5 (340)
Heating; 10.4 (370)
—
Hi
m3/min (cfm)
Cooling; 11.0 (390)
Heating; 11.5 (405)
40.0 (1,410)
dB (A)
Cooling; High 36, Low 28
Heating; High 37, Low 29
Cooling; 47
Heating; 48
Power level dB
Cooling; High 49
Heating; High 50
Cooling; High 60
Heating; High 61
Noise Level
Electrical Data
Input Power
W
Cooling; 1,530 (255 - 1,930)
Heating; 1,900 (260 - 2,450)
Running Current
A
Cooling; 7.0 - 6.9
Heating; 8.5 - 8.3
EER
COP
Starting Current
Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
W/W
BTU/hW
W/W
BTU/hW
A
inch
inch
inch
inch
8
Cooling; 3.14 (3.53 - 2.95)
Cooling; 10.7 (12.0 - 10.1)
Heating; 2.95 (3.46 - 2.90)
Heating; 10.1 (11.8 - 9.9)
8.5
G ; Half Union 1/2”
G ; 3-way valve 1/2”
L ; Half Union 1/4”
L ; 2-way valve 1/4”
G (gas side) ; 1/2”
G (gas side) ; 1/2”
L (liquid side) ; 1/4”
L (liquid side) ; 1/4”
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
Drain
Hose
Power Cord Length
Number of core-wire
Dimensions
Height
Width
Depth
Net Weight
Compressor
Motor
Rated
Air Circulation
Motor
Fan Speed
Heat Exchanger
Unit
mm
m
Inner diameter
Length
CS-E18DB4EW
30
0.193
——
inch (mm)
inch (mm)
inch (mm)
lb (kg)
Type
Type
Output
Type
Material
Type
Rate Output
Lo (Cool/Heat)
Me (Cool/Heat)
Hi (Cool/Heat)
W
W
rpm
rpm
rpm
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W × H × L)
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R410A)
Thermostat
Protection Device
mm
(cm3)
kg (oz)
CU-E18DBE
—
—
—
—
10 - 1/4 (260)
29 - 17/32 (750)
22 - 5/8 (575)
34 - 7/16 (875)
22 - 5/8 (575)
13 - 19/32 (345)
40 (18)
106 (48)
—
Involute scroll
—
Brushless (4-pole)
—
900
Backward Fan
Propeller Fan
ABS + GF 10%
P.P
DC Brushless Motor (8-poles)
Transistor (8-poles)
40
40
430 / 490
—
510 / 560
—
590 / 640
660 / 660
Evaporator
Condenser
Copper
Copper
Aluminium (Pre Coat)
Aluminium
Slit Fin
Corrugated Fin
(Plate fin configuration, forced draft)
2 / 10
2 / 34
18
16
1,330 × 210 × 25.4
849.3 × 714 × 36.4
1,270
878
—
Expansion Valve
—
RB68A (400)
—
1.06 (37.4)
Electronic Control
—
Electronic Control
Electronic Control
• Specifications are subjected to change without notice for further improvement.
9
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
3.3.
CS-E21DB4ES CU-E21DBE
Unit
CS-E21DB4ES
CU-E21DBE
Cooling Capacity
kW
kcal/h
BTU/h
5.90 (0.90 - 6.30)
5,070 (770 - 5,420)
20,100 (3,070 - 21,500)
Heating Capacity
kW
kcal/h
BTU/h
7.00 (0.90 - 8.00)
6,020 (770 - 6,880)
23,900 (3,070 - 27,300)
Moisture Removal
l/h
Pint/h
3.3
(7.0)
ø
V
Hz
Single
230 - 240
50
Power Source (Phase, Voltage, Cycle)
Airflow Method
OUTLET
SIDE VIEW
TOP VIEW
INTAKE
Air Volume
Lo
m3/min (cfm)
Cooling; 9.3 (330)
Heating; 10.6 (370)
—
Me
m3/min (cfm)
Cooling; 11.0 (390)
Heating; 12.3 (430)
—
Hi
m3/min (cfm)
Cooling; 12.8 (450)
Heating; 14.0 (495)
Cooling; 42.8 (1,510)
Heating; 41.5 (1,460)
dB (A)
Cooling; High 41, Low 33
Heating; High 42, Low 34
Cooling; 49
Heating; 49
Power level dB
Cooling; High 54
Heating; High 55
Cooling; High 62
Heating; High 62
Noise Level
Electrical Data
Input Power
W
Cooling; 2,050 (255 - 2,200)
Heating; 2,450 (260 - 2,820)
Running Current
A
Cooling; 9.2 - 9.0
Heating; 10.9 - 10.6
EER
COP
Starting Current
Piping Connection Port
(Flare piping)
Pipe Size
(Flare piping)
W/W
BTU/hW
W/W
BTU/hW
A
inch
inch
inch
inch
10
Cooling; 2.88 (3.53 - 2.86)
Cooling; 9.8 (12.0 - 9.8)
Heating; 2.86 (3.46 - 2.84)
Heating; 9.8 (11.8 - 9.7)
10.9
G ; Half Union 1/2”
G ; 3-way valve 1/2”
L ; Half Union 1/4”
L ; 2-way valve 1/4”
G (gas side) ; 1/2”
G (gas side) ; 1/2”
L (liquid side) ; 1/4”
L (liquid side) ; 1/4”
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
Drain
Hose
Power Cord Length
Number of core-wire
Dimensions
Height
Width
Depth
Net Weight
Compressor
Motor
Rated
Air Circulation
Motor
Fan Speed
Heat Exchanger
Unit
mm
m
Inner diameter
Length
inch (mm)
inch (mm)
inch (mm)
lb (kg)
Type
Type
Output
Type
Material
Type
Rate Output
Lo (Cool/Heat)
Me (Cool/Heat)
Hi (Cool/Heat)
W
W
rpm
rpm
rpm
Description
Tube material
Fin material
Fin Type
Row / Stage
FPI
Size (W × H × L)
Refrigerant Control Device
Refrigeration Oil
Refrigerant (R410A)
Thermostat
Protection Device
mm
(cm3)
kg (oz)
CS-E21DB4ES
30
0.193
——
CU-E21DBE
—
—
—
—
10 - 1/4 (260)
29 - 17/32 (750)
22 - 5/8 (575)
34 - 7/16 (875)
22 - 5/8 (575)
13 - 19/32 (345)
40 (18)
108 (49)
—
Involute scroll
—
Brushless (4-pole)
—
900
Backward Fan
Propeller Fan
ABS + GF 10%
P.P
DC Brushless Motor (8-poles)
Transistor (8-poles)
40
40
510 / 580
—
600 / 670
—
700 / 770
700 / 680
Evaporator
Condenser
Copper
Copper
Aluminium (Pre Coat)
Aluminium
Slit Fin
Corrugated Fin
(Plate fin configuration, forced draft)
2 / 10
2 / 34
18
18
1,330 × 210 × 25.4
839.5 × 714 × 36.4
1,270
868
—
Expansion Valve
—
RB68A (400)
—
1.15 (40.6)
Electronic Control
—
Electronic Control
Electronic Control
• Specifications are subjected to change without notice for further improvement.
11
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
4 Dimensions
4.1.
4.1.1.
Indoor Unit & Remote Control
CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
12
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
4.2.
4.2.1.
Outdoor Unit
CU-E15DBE CU-E18DBE CU-E21DBE
13
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5 Refrigeration Cycle Diagram
14
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
6 Block Diagram
15
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
7 Wiring Diagram
16
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
8 Operation Details
8.1.
Basic Operation
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjust output power for maximum comfort always.
In order to achieve the suitable operation mode, the microcomputer maintains the set temperature by measuring the
temperature of environment and performing temperature shifting.
8.1.1.
Temperature Shifting Flow
The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that judging the
condition according to internal setting temperature.
17
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8.1.2.
8.1.2.1.
Cooling Operation
Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
8.1.3.
8.1.3.1.
Soft Dry Operation
Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.0°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
8.1.4.
8.1.4.1.
Heating Operation
Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF
point.
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CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
8.1.5.
Automatic Operation
This mode can be set using remote control and the operation is decided by remote control setting temperature, indoor intake air
temperature and outdoor air temperature.
During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to detect
the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.
Values of T1, T2, and T3 depend on remote control setting temperature, as shown in below table. After the adjustment of T1, T2
and T3 values, the operation mode for that particular environment and remote control setting is judged and performed, based on
the above operation mode chart, every 30 minutes.
Remote Control Setting Temperature (°C)
16 ~ 18
19 ~ 22
23 ~ 26
27 ~ 30
T1
+10
+8
+7
+6
T2
-3
-3
-3
-3
T3
-5
-7
-7
-8
There is a temperature shifting on T1, T2, and T3 if the operation mode judged is changed from Cooling/Soft Dry to Heating or vice
verse.
Operation Mode change from
Cooling/Soft Dry → Heating
Heating → Cooling/Soft Dry
Temperature shifts (°C)
-2
+2
Example of operation mode chart adjustment:
From the above table, if remote control setting temperature = 25,
T1 = 25 + 7 = 32; T2 = 25 - 3 = 22; T3 = 25 - 7 = 18
The operation mode chart for this example is as shown in below figure and the operation mode to be performed will depend on
indoor intake air temperature and outdoor air temperature at the time when the judgment is made.
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8.1.6.
Indoor Fan Motor Operation
A. Basic Rotation Speed (rpm)
• Required rotation speed for fan is set to respond to the remote control setting (10 rpm unit)
[Cooling, Dry, Fan]
Remote Control
Tab (rpm)
E15D
E18D
E21D
—
PSHI
600
680
800
—
SHI
560
640
750
O
Hi
560
590
700
O
Me+
495
563
660
O
Me
480
510
600
O
Me425
488
560
O
Lo
400
430
510
—
Lo370
410
480
—
SLo
310
350
410
—
SSLo
200
200
200
—
PSHi
650
740
870
—
SSHi
610
690
820
O
SHi
600
640
770
O
Me+
545
618
745
O
Me
540
560
670
O
Me495
553
655
O
Lo
480
490
580
—
Lo440
490
570
—
SLo
300
320
370
—
SSLo
200
200
200
[Heating]
Remote Control
Tab (rpm)
E15D
E18D
E21D
B. Indoor Fan Control
i. Indoor fan control operation outline
1. Cooling / Dry
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2. Heating
ii. Auto Fan Speed
1. Cooling
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2. Heating
Note:
a. UP:
• If move from Lo, the fan speed will be shifted to Maximum 1520 rpm.
• If move from Maximum, the fan speed no change.
• In up zone, 10 rpm is added for every 10s until Maximum 1520 rpm.
b. DOWN:
• The fan speed will be decreased one step every 10 sec. until Minimum 1270 rpm.
c. Current Output Fixed:
• Maintain at present fan speed.
d. Instantaneous Maximum:
• Fan speed will be increased to maximum auto fan speed.
e. Temperature in ( ) is for Powerful Mode operation.
C. Fan Motor Control
1. Motor specification
High voltage PWM Motor
2. Feedback Control
a. Number-of-rotations feedback
Immediately after the fan started, rpm is checked and duty is added, and feedback control is performed. For high voltage
PWM motor, it is done once every 0.5 second.
b. Offset duty T max/min limit
High voltage PWM motor has maximum offset duty.
(Refer Indoor fan motor control basic rotation speed)
3. Abnormal Detection Control
Conditions:
a. Out of rhythm signal input
b. If feedback number of rotations exceeded #2550 r/min or when less than #50 r/min.
Control: Fans stop
Return: Restart after 5 seconds
* It will not detect the out of rhythm condition within 5s for phase control motor (PWM motor is when duty=0) after start.
A fan stops when condition (1) and (2) happen within 25.0 seconds after fan starting, and if this happens for continuously
7 times, it will not retry.
→ FM lock processing
4. Restart Prohibition Control
Restart is prohibited within 5s for phase control motor (PWM motor is when duty=0) after fan stop (except re-ON the power
supply).
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D. Deodorizing Control
i. Control condition
Control at cooling/dry operation and auto fan speed.
No Deodorizing Control is performed during ON timer standby operation and during Anti-freezing control prevention.
ii. Operation
The odor status is arranged as below and it is shifted as follow.
* When COMP is ON
1→2→3
(Shift to 4 when COMP is OFF)
* When COMP is OFF
4 → 5 → 6 → 7 → 6 ←→ 7
(Shift to 1 when COMP is ON)
* Start from 4 if the Thermostat is OFF during the start operation.
Odor Status
Status Shift
according to COMP
Status Shift
Cooling
according
zone
to time (s)
Dry zone
Cooling
zone
Fan Speed
Dry zone
8.1.7.
1
2
3
4
5
6
ON
40
50
7
6.7.6...
90
20.90.20...
OFF
—
30
90
20
1
ON
ON
Auto Fan Speed
OFF
SSLo
SSLo
OFF
SSLo
OFF
SSLo.OFF...
SLo
Outdoor Fan Motor Operation
Outdoor fan motor is operated with 15 fan speed. It starts when compressor starts operation and it stops 30 seconds after
compressor stops operation for speed no.8.
No.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
E21D
75
75
70
68
64
62
58
50
45
40
35
30
25
20
15
RPM during Fan Speed (rpm)
E18D
73
73
68
66
62
60
58
50
45
40
35
30
25
20
15
23
E15D
71
71
66
64
60
60
58
50
45
40
35
30
25
20
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8.1.8.
Airflow Direction
1. There are one types of airflow, vertical airflow (directed by horizontal vane).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature
and intake air temperature) and manual (angles of direction can be adjusted using remote control).
8.1.8.1.
Vertical Airflow
Operation Mode
Airflow Direction
1
Heating
Cooling, Soft Dry and Ion
Auto with Heat Exchanger
Temperature
A
B
C
D
Downward fix
Downward fix
Upward fix
Upward fix
Manual
Auto
Manual
20
20
Vane Angle (°)
2
3
4
70
70
20
20
20 ~ 70
-
5
70
70
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions
of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position.
8.1.9.
Quiet operation (Cooling Mode/Cooling area of Dry Mode)
A. Purpose
To provide quiet cooling operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “quiet” button at remote control is pressed.
Quiet LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. Powerful button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. Quiet button is pressed again.
2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
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C. Control contents
1. Fan speed is changed from normal setting to quiet setting of respective fan speed.
This is to reduce sound of Hi, Me, Lo for 3dB.
2. Fan speed for quiet operation is -1 step from setting fan speed.
8.1.9.1.
Quiet operation (Heating)
A. Purpose
To provide quiet heating operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “quiet” button at remote control is pressed.
Quiet LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. Powerful button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. Quiet button is pressed again.
2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode, except fan only mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
C. Control contents
a. Fan Speed manual
1. Fan speed is changed from normal setting to quiet setting of respective fan speed.
This is to reduce sound of Hi, Me, Lo for 3dB.
2. Fan speed for quiet operation is -1 step from setting fan speed.
3. Fan Speed Auto
Indoor FM RPM depends on pipe temp sensor of indoor heat exchanger.
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8.1.10. Powerful Mode Operation
When the powerful mode is selected, the internal setting temperature will shift to achieve the setting temperature quickly.
(a) Cooling Operation
(b) Soft Dry Operation
(c) Heating Operation
8.1.11. 24-Hour Real Time Timer Control
ON Timer
ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide
a comfortable environment when reaching the set ON time.
Outdoor fan-ON instructions are transmitted to outdoor unit 60 minutes before setting time, then sampling the outdoor / indoor
temperature with indoor fan at Lo- for 30 seconds. After detecting the indoor/outdoor temperature, the unit determines the
operation starting time according to the load. However, when outdoor unit is operating, the preparation starting time will be set
to minimum.
OFF Timer
When the OFF timer is set by using the remote control, the unit stop operate according to the desired setting.
Notes:
1. By pressing ON/OFF operation button, the ON Timer/OFF Timer setting will not be cancelled.
2. To cancel the previous timer setting, press CANCEL button.
3. To activate the previous timer setting, press SET button.
4. If main power supply is switched off, the Timer setting will be cancelled.
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8.1.12. Auto Restart Control
1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four
minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power
supply resumes.
2. This type of control is not applicable during ON/OFF Timer setting.
8.1.13. Indication Panel
LED
Color
Light ON
Light OFF
POWER
Green
Operation ON
Operation OFF
TIMER
Orange
Timer Setting ON
Timer Setting OFF
QUIET
Orange
Quiet Mode ON
Quiet Mode OFF
POWERFUL
Orange
Powerful Mode ON
Powerful Mode OFF
AIR SWING
Orange
Auto Air Swing ON
Auto Air Swing OFF
Note:
• If POWER LED is blinking, the possible operations of the unit are Hot Start, during Deice operation, operation mode
judgment, or delay ON timer sampling.
• If Timer LED is blinking, there is an abnormality operation occurs.
8.1.14. Drain Pump Control Operation
• To drain out the condensed watar trapped in the drain pan in order to prevent the condensed water from overflowing from the
drain pan and leaking.
• Drain Pump starts to operate 10 sec. after compressor and Indoor fan ON.
• Drain Pump stop to operate 90 sec. after compressor OFF.
Drain Pump Error
Drain Pump Error occurs when:
- Within 20 minutes, the float switch is ON twice.
- Float switch is ON continuously for 2 minutes 30 seconds.
When error occurs, the timer indicator blinks and the unit stops its operation.
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8.2.
8.2.1.
8.2.1.1.
Protection Control Features
Protection Control For All Operations
Time Delay Safety Control
1. The compressor will not start for three minutes after stop of operation.
2. This control is not applicable if the power supply is cut off for 20 seconds and on again or after 4-way valve deices condition.
8.2.1.2.
30 Seconds Forced Operation
1. Once the compressor starts operation, it will not stop its operation for 30 seconds.
2. However, it can be stopped using remote control or Auto Switch at indoor unit.
8.2.1.3.
Total Running Current Control
1. When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be
decreased.
2. If the running current does not exceed X value for five seconds, the frequency instructed will be increased.
3. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 2 minutes.
Model
Operation Mode
Cooling/Soft Dry (A)
Cooling/Soft Dry (B) & (C)
Heating
E15D
X (A)
7.20
6.30
8.60
E18D
Y (A)
17
17
17
X (A)
8.74
7.70
10.71
E21D
Y (A)
17
17
17
X (A)
11.02
9.59
11.53
Y (A)
17
17
17
4. The first 30 minutes of cooling operation, (A) will be applied.
8.2.1.4.
IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 100°C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95°C.
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 22.33 A, the compressor will stop operate. Then, operation will restart
after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after 1 minute.
3. If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute.
If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
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8.2.1.5.
Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency
are as below figure.
8.2.1.6.
Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
Control will perform when (1) - (3) condition continues operation for 5 minute and (4) is fulfill.
1. During cooling and dry operation: Frequency more than normal Fcmax 78 Hz (E15D), 86 Hz (E18D), 102 Hz (E21D).
During heating operation: Frequency more than normal Fh 71 Hz (E15D), 86 Hz (E18D), 92 Hz (E21D).
2. Outdoor total current I cooling: Ib I Ia
Heating: Ib I Ic
Ic = Ia = 1.65 A
Ib = 0.65 A
3. It is not during deice operation.
4. During cooling and dry operation: indoor suction-indoor piping temperature is below 4°C.
During of heating operation: Indoor piping temperature-indoor suction is under 5°C.
Control contents:
• compressor stops (restart after 3 minutes)
• if happen 2 times within (20 minutes), perform the following operation
1) Unit stop operation
2) Timer LED blink and “F91” indicated
8.2.1.7.
Low Frequency Protection Control 1
When the compressor operate at frequency lower than 25 Hz continued for 20 minutes, the operation frequency will be increased
to 24 Hz for two minutes.
8.2.1.8.
Low Frequency Protection Control 2
When all the below conditions occur, minimum value (Freq. MIN) for the frequency instructed to compressor will change to 30 Hz
for cooling mode operation and 20 Hz for heating mode operation.
Temperature, T, for:
Indoor intake air (°C)
Outdoor air (°C)
Indoor heat exchanger (°C)
Cooling/Soft Dry
T 14 or T 30
T 13 or T 38
T 30
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Heating
T 14 or T 28
T 4 or T 24
T 0
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8.2.2.
8.2.2.1.
Protection Control For Cooling & Soft Dry Operation
Outdoor Air Temperature Control
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
This control will begin one minute after the compressor starts.
8.2.2.2.
Cooling Overload Control
i. Pipe temperature limitation/restriction
• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 63°C
• If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95: outdoor high pressure rise protection)
ii. Electrical part temperature rise protection control
1. Purpose
To prevent electronic components temperature rise during cooling overload.
2. Judgement Conditions
a) Outdoor temperature
b) Outdoor total current above 5 A.
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3. Control contents
In the outdoor fan speed no.
i) In protectorate Domain A is referred to as min 660 rpm.
ii) In protectorate Domain B, it is referred to as min 600 rpm.
4. Condition resolutive
It is canceled when it stops satisfying all of the above-mentioned.
8.2.2.3.
Anti-Freezing Control
1. When indoor heat exchanger temperature is lower than 7°C continuously for six minutes, compressor will stop operating.
2. Compressor will resume its operation three minutes after the indoor heat exchanger is higher than 13°C.
3. At the same time, indoor fan speed increase +20 rpm compared to its normal operation.
4. If indoor heat exchanger temperature is higher than 13°C for five minutes, the fan speed will return to its normal operation.
8.2.2.4.
Anti-Dew Formation Control
a. Purpose
To prevent dew.
b. Control start conditions
When indoor are ceiling floor, duct and mini casette.
c. Control contents
Hz control is carried out according to the spray prevention status transmitted from indoor.
Spray prevention
status(transmitted indoor)
0 (it usually controls
1 (rise)
2 (changeless)
3 (down)
Control contents
Relative control domain
MAX domain
Usually, control
Usually, control
Relative change control priority
On tap up/10 seconds
Changeless
Changeless
-2 Hz/10 seconds
-2 Hz/10 seconds
Change is once to 10 seconds.
* Once the standup went into the down domain by Fcmax as for the Fcmax domain, it shifts to relative change control domain.
When the higher rank of relative control has this control and the status signal of 2-3 has come out.
Relative change control is stopped and follows directions of spray control.
Priority is given to the which is larger when freeze prevention down status and spray prevention down status are transmitted
simultaneously.
In the case of spray status
0, it is referred to as maxFc.
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8.2.3.
8.2.3.1.
Protection Control For Heating Operation
Intake Air Temperature Control
Compressor will operate at Max freq 94 (E15D), 128 (E18D, E21D) Hz if either one of the below conditions occur:
1. When the indoor intake air temperature is less than 21°C and remote control setting fan speed is lower Me-.
2. When the indoor intake air temperature is 35°C or above.
8.2.3.2.
Outdoor Air Temperature Control
The Max current value is regulated in accordance to the outdoor air temperature as shown in the below figures.
8.2.3.3.
Overload Protection Control
The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown in below figures.
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8.2.3.4.
Deice Control
• Deice starts to prevent frosting at outdoor heat exchanger.
• Deice operation detection commences after minimum 60 minutes of Heating Operation.
• The outdoor heat exchanger temperature drops below 3°C for long period (minimum 40 minutes) during compressor is in
operation, the deice operation may starts.
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9 Operating Instructions
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10 Installation And Servicing Air Conditioner Using R410A
10.1. Outline
10.1.1. About R410A Refrigerant
1. Converting air conditioners to R410A
Since it was declared in1974 that chlorofluorocarbons (CFC), hydro chlorofluorocarbons (HCFC) and other substances pose a
destructive danger to the ozone layer in the earth´s upper stratosphere (20 to 40 km above the earth), measures have been
taken around the world to prevent this destruction.
The R22 refrigerant which has conventionally been used in ACs is an HCFC refrigerant and, therefore, possesses this ozonedestroying potential. International regulations (the Montreal Protocol on Ozone-Damaging Substances) and the domestic laws
of various countries call for the early substitution of R22 by a refrigerant which will not harm the ozone layer.
• In ACs, the HFC refrigerant which has become the mainstream alternative is called R410A.Compared with R22, the
pressure of R410A is approximately 1.6 times as high at the same refrigerant temperature, but the energy efficiency is about
the same. Consisting of hydrogen (H), fluorine (F) and carbon (C), R410A is an HFC refrigerant. Another typical HFC
refrigerant is R407C. While the energy efficiency of R407C is somewhat inferior to that of R410A, it offers the advantage
of having pressure characteristics which are about the same as those of R22, and is used mainly in packaged ACs.
2. The characteristics of HFC (R410A) refrigerants
a. Chemical characteristics
The chemical characteristics of R410A are similar to those of R22 in that both are chemically stable, non-flammable
refrigerants with low toxicity.
However, just like R22, the specific gravity of R410A gas is heavier than that of air. Because of this, it can cause an oxygen
deficiency if it leaks into a closed room since it collects in the lower area of the room. It also generates toxic gas when it is
directly exposed to a flame, so it must be used in a well ventilated environment where it will not collect.
Composition (wt%)
Boiling point (°C)
Vaporizing pressure (25°C)
Saturated vapor density
Flammability
Ozone-destroying point (ODP)
Global-warming point (GWP)
Table 1 Physical comparison of R410A and R22
R410A
R32/R125 (50/50)
-51.4
1.56 Mpa (15.9 kgf/cm2)
64.0 kg/m3
Non-flammable
0
1730
R22
R22 (100)
-40.8
0.94 Mpa (9.6 kgf/cm2)
44.4 kg/m3
Non-flammable
0.055
1700
b. Compositional change (pseudo-azeotropic characteristics)
R410A is a pseudo-azeotropic mixture comprising the two components R32 and R125. Multi-component refrigerants with
these chemical characteristics exhibit little compositional change even from phase changes due to vaporization (or
condensation), which means that there is little change in the circulating refrigerant composition even when the refrigerant
leaks from the gaseous section of the piping.
Accordingly, R410A can be handled in almost the same manner as the single-component refrigerant R22. However, when
charging, because there is a slight change in composition between the gas phase and the liquid phase inside a cylinder or
other container, charging should basically begin with the liquid side.
c. Pressure characteristics
As seen in Table 2, the gas pressure of R410A is approximately 1.6 times as high as that of R22 at the same refrigerant
temperature, which means that special R410A tools and materials with high-pressure specifications must be used for all
refrigerant piping work and servicing.
Table 2 Comparison of R410A and R22 saturated vapor density
Unit: MPa
Refrigerant Temperature (°C)
R410A
-20
0.30
0
0.70
20
1.35
40
2.32
60
3.73
65
4.15
42
R22
0.14
0.40
0.81
1.43
2.33
2.60
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d. R410A refrigerating machine oil
Conventionally, mineral oil or a synthetic oil such as alkylbenzene has been used for R22 refrigerating machine oil. Because
of the poor compatibility between R410A and conventional oils like mineral oil, however, there is a tendency for the
refrigerating machine oil to collect in the refrigerating cycle. For this reason, polyester and other synthetic oils which have
a high compatibility with R410A are used as refrigerating machine oil.
Because of the high hygroscopic property of synthetic oil, more care must be taken in its handling than was necessary with
conventional refrigerating machine oils. Also, these synthetic oils will degrade if mixed with mineral oil or alkylbenzene,
causing clogging in capillary tubes or compressor malfunction. Do not mix them under any circumstances.
10.1.2. Safety Measures When Installing/Servicing Refrigerant Piping
Cause the gas pressure of R410A is approximately 1.6 times as high as that of R22, a mistake in installation or servicing could
result in a major accident. It is essential that you use R410A tools and materials, and that you observe the following precautions
to ensure safety.
1. Do not use any refrigerant other than R410A in ACs that have been used with R410A.
2. If any refrigerant gas leaks while you are working, ventilate the room. Toxic gas may be generated if refrigerant gas is exposed
to a direct flame.
3. When installing or transferring an AC, do not allow any air or substance other than R410A to mix into the refrigeration cycle. If
it does, the pressure in the refrigeration cycle can become abnormally high, possibly causing an explosion and/or injury.
4. After finishing the installation, check to make sure there is no refrigerant gas leaking.
5. When installing or transferring an AC, follow the instructions in the installation instructions carefully. Incorrect installation can
result in an abnormal refrigeration cycle or water leakage, electric shock, fire, etc.
6. Do not perform any alterations on the AC unit under any circumstances. Have all repair work done by a specialist. Incorrect
repairs can result in an water leakage, electric shock, fire, etc.
10.2. Tools For Installing/Servicing Refrigerant Piping
10.2.1. Necessary Tools
In order to prevent an R410A AC from mistakenly being charged with any other refrigerant, the diameter of the 3-way valve service
port on the outdoor unit has been changed. Also, to increase its ability to withstand pressure, the opposing dimensions have been
changed for the refrigerant pipe flaring size and flare nut. Accordingly, when installing or servicing refrigerant piping, you must have
both the R410A and ordinary tools listed below.
Type of work
Flaring
Bending, connecting pipes
Air purging
Gas leak inspection
Table 3 Tools for installation, transferring or replacement
Ordinary tools
R410A tools
Flaring tool (clutch type), pipe cutter,
Copper pipe gauge for clearance
reamer
Adjustment, flaring tool (clutch type)*1)
Torque wrench (nominal diameter 1/4,
3/8,1/2). Fixed spanner (opposing sides
12 mm, 17 mm, 19 mm). Adjustable
wrench, Spring bender
Vacuum pump. Hexagonal wrench
Manifold gauge, charging hose, vacuum
(opposing sides 4 mm)
pump adaptor
Gas leak inspection fluid or soapy water
Electric gas leak detector for HFC
refrigerant*2)
*1) You can use the conventional (R22) flaring tool. If you need to buy a new tool, buy the R410A type.
*2) Use when it is necessary to detect small gas leaks.
For other installation work, you should have the usual tools, such as screwdrivers (+,-), a metal-cutting saw, an electrical drill, a hole
core drill (65 or 70 dia.), a tape measure, a level, a thermometer, a clamp meter, an insulation tester, a voltmeter, etc.
Type of work
Refrigerant charging
Brazing
part*1)
(Replacing
refrigerating
Table 4 Tools for serving
Ordinary tools
R410A tools
Electronic scale for refrigerant charging.
Refrigerant cylinder. Charging orifice and
packing for refrigerant cylinder
cycle Nitrogen blow set (be sure to use nitrogen
blowing for all brazing), and brazing
machine
*1) Always replace the dryer of the outdoor unit at the same time. The replacement dryer is wrapped in a vacuum pack. Replace
it last among the refrigerating cycle parts. Start brazing as soon as you have opened the vacuum pack, and begin the vacuuming
operation within 2 hours.
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10.2.2. R410A Tools
1. Copper tube gauge for clearance adjustment
(used when flaring with the conventional flaring tool (clutch
type))
• This gauge makes it easy to set the clearance for the
copper tube to 1.0-1.5 mm from the clamp bar of the
flaring tool.
Fig. 1 Copper tube gauge for clearance adjustment
2. Flaring tool (clutch type)
• In the R410A flaring tool, the receiving hole for the
clamp bar is enlarged so the clearance from the clamp
bar can be set to 0-0.5 mm, and the spring inside the
tool is strengthened to increase the strength of the pipeexpanding torque. This flaring tools can also be used
with R22 piping, so we recommend that you select it if
you are buying a new flaring tool.
Fig. 2 Flaring tool (clutch type)
3. Torque wrenches
Fig. 3 Torque wrenches
For 1/4 (opposite side x torque)
For 3/8 (opposite side x torque)
For 1/2 (opposite side x torque)
Table 5
Conventional wrenches
17 mm x 18 N.m (180 kgf.cm)
22 mm x 42 N.m (420 kgf.cm)
24 mm x 55 N.m (550 kgf.cm)
R410A wrenches
17 mm x 18 N.m (180 kgf.cm)
22 mm x 42 N.m (420 kgf.cm)
26 mm x 55 N.m (550 kgf.cm)
4. Manifold gauge
• Because the pressure is higher for the R410A type, the conventional type cannot be used.
Table 6 Difference between R410A and conventional high / low-pressure gauges
Conventional gauges
R410A gauges
High-pressure gauge (red)
-76 cmHg - 35 kgf/cm3
-0.1 - 5.3 Mpa -76 cmHg - 53 kgf/cm3
Low-pressure gauge (blue)
-76 cmHg - 17 kgf/cm3
-0.1 - 3.8 Mpa -76 cmHg - 38 kgf/cm3
• The shape of the manifold ports has been changed to prevent the possibility of mistakenly charging with another type of
refrigerant.
Port size
Table 7 Difference between R410A and conventional manifold port size
Conventional gauges
R410A gauges
7/16 UNF 20 threads
1/2 UNF 20 threads
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5. Charging hose
• The pressure resistance of the charging hose has been
raised to match the higher pressure of R410A. The hose
material has also been changed to suit HFC use, and
the size of the fitting has been changed to match the
manifold ports.
Fig. 4 Manifold gauge charging hose
Pressure
resistance
Material
Table 8 Difference between R410A and conventional charging hoses
Conventional hoses
R410A hoses
Working pressure
3.4 MPa (35 kgf/cm 3)
5.1 MPa (52 kgf/cm 3)
Bursting pressure
17.2 MPa (175 kgf/cm3)
27.4 MPa (280 kgf/cm3)
NBR rubber
HNBR rubber Nylon coating inside
6. Vacuum pump adaptor
• When using a vacuum pump for R410A, it is necessary
to install an electromagnetic valve to prevent the
vacuum pump oil from flowing back into the charging
hose. The vacuum pump adaptor is installed for that
purpose. if the vacuum pump oil (mineral oil) becomes
mixed with R410A, it will damage the unit.
Fig. 5 Vacuum pump adaptor
7. Electric gas leak detector for HFC refrigerant
• The leak detector and halide torch that were used with
CFC and HCFC cannot be used with R410A (because
there is no chlorine in the refrigerant).
• The present R134a leak detector can be used, but the
detection sensitivity will be lower (setting the sensitivity
for R134a at 1, the level for R410A will drop to 0.6).
• For detecting small amounts of gas leakage, use the
electric gas leak detector for HFC refrigerant. (Detection
sensitivity with R410A is about 23 g/year).
Fig. 6 Electric gas leak detector for HFC refrigerant
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8. Electronic scale for refrigerant charging
• Because of the high pressure and fast vaporizing speed
of R410A, the refrigerant cannot be held in a liquid
phase inside the charging cylinder when charging is
done using the charging cylinder method, causing
bubbles to form in the measurement scale glass and
making it difficult to see the reading. (Naturally, the
conventional R22 charging cylinder cannot be used
because of the differences in the pressure resistance,
scale gradation, connecting port size, etc.)
• The electronic scale has been strengthened by using a
structure in which the weight detector for the refrigerant
cylinder is held by four supports. It is also equipped with
two connection ports, one for R22 (7/16 UNF, 20
threads) and one for R410A (1/2 UNF, 20 threads), so
it can also be used for conventional refrigerant charging.
Fig. 7 Electronic scale for refrigerant charging
• There are two types of electronic scales, one for 10-kg
cylinders and one for 20-kg cylinders. (The 10-kg
cylinder is recommended.)
Refrigerant charging is done manually by opening and
closing the valve.
9. Refrigerant cylinders
• The R410A cylinders are labeled with the refrigerant
name, and the coating color of the cylinder protector is
pink, which is the color stipulated by ARI of the U.S.
• Cylinders equipped with a siphon tube are available to
allow the cylinder to stand upright for liquid refrigerant
charging.
Fig. 8 Refrigerant cylinders
10. Charging orifice and packing for refrigerant cylinders
• The charging orifice must match the size of the charging
hose fitting (1/2 UNF, 20 threads).
• The packing must also be made of an HFC-resistant
material.
Fig. 9 Charging orifice and packing
10.2.3. R410A Tools Which Are Usable for R22 Models
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Table 9 R410A tools which are usable for R22 models
R410A tools
Usable for R22 models
Copper tube gauge for clearance adjustment
OK
Flaring tool (clutch type)
OK
Manifold gauge
NG
Charging hose
NG
Vacuum pump adaptor
OK
Electric gas leak detector for HFC refrigerant
NG
Electronic scale for refrigerant charging
OK
Refrigerant cylinder
NG
Charging orifice and packing for refrigerant cylinder
NG
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10.3. Refrigerant Piping Work
10.3.1. Piping Materials
It is recommended that you use copper and copper alloy jointless pipes with a maximum oil adherence of 40 mg/10m. Do not use
pipes that are crushed, deformed, or discolored (especially the inside surface). If these inferior pipes are used, impurities may clog
the expansion valves or capillaries.
Because the pressure of ACs using R410A is higher than those using R22, it is essential that you select materials that are
appropriate for these standards.
The thickness of the copper tubing used for R410A is shown in Table 10. Please be aware that tubing with a thickness of only 0.7
mm is also available on the market, but this should never be used.
Table 10 Copper tube thickness (mm)
Soft pipe
Nominal diameter
1/4
3/8
1/2
Thickness (mm)
Outside diameter (mm)
6.35
9.52
12.7
R410A
0.80
0.80
0.80
(Reference) R22
0.80
0.80
0.80
10.3.2. Processing and Connecting Piping Materials
When working with refrigerant piping, the following points must
be carefully observed: no moisture od dust must be allowed to
enter the piping, and there must be no refrigerant leaks.
1. Procedure and precautions for flaring work
a. Cut the pipe
Use a pipe cutter, and cut slowly so the pipe will not be
deformed.
b. Remove burrs and clean shavings from the cut surface
If the shape of the pipe end is poor after removing burrs,
or if shavings adhere to the flared area, it may lead to
refrigerant leaks.
To prevent this, turn the cut surface downward and
remove burrs, then clean the surface, carefully.
Fig. 10 Flaring dimensions
c. Insert the flare nut (be sure to use the same nut that is
used on the AC unit)
d. Flaring
Check the clamp bar and the cleanliness of the copper
pipe.
Be sure to use the clamp bar to do the flaring with
accuracy. Use either an R410A flaring tool, or a
conventional flaring tool. flaring tools come in different
sizes, so be sure to check the size before using. When
using a conventional flaring tool, use the copper pipe
gauge for clearance adjustment, etc., to ensure the
correct A dimension (see Fig. 10)
Fig. 11 Relation between the flare nut structure and flaring tool end
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Nominal
diameter
Outside
diameter
(mm)
1/4
3/8
1/2
6.35
9.52
12.70
Nominal
diameter
Outside
diameter
(mm)
1/4
3/8
1/2
6.35
9.52
12.70
Table 11 R410A flaring dimensions
Wall thickness
(mm)
R410A flaring
tool, clutch type
0.8
0.8
0.8
0 - 0.5
0 - 0.5
0 - 0.5
Table 12 R22 flaring dimensions
Wall thickness
(mm)
R410A flaring
tool, clutch type
0.8
0.8
0.8
0 - 0.5
0 - 0.5
0 - 0.5
A (mm)
Conventional flaring tool
Clutch type
Wing-nut type
1.0 - 1.5
1.5 - 2.0
1.0 - 1.5
1.5 - 2.0
1.0 - 1.5
2.0 - 2.5
A (mm)
Conventional flaring tool
Clutch type
Wing-nut type
0.5 - 1.0
1.0 - 1.5
0.5 - 1.0
1.0 - 1.5
0.5 - 1.0
1.5 - 2.0
Nominal
diameter
1/4
3/8
1/2
Table 13 R410A flare and flare nut dimensions Unit: mm
Outside
Wall thickness
A +0, -0.4
B
C
diameter (mm)
(mm)
dimension
dimension
6.35
0.8
9.1
9.2
6.5
9.52
0.8
13.2
13.5
9.7
12.70
0.8
16.6
16.0
12.9
D
dimension
13
20
23
Flare nut
width
17
22
26
Nominal
diameter
1/4
3/8
1/2
Table 14 R22 flare and flare nut dimensions Unit: mm
Outside
Wall thickness
A +0, -0.4
B
C
diameter (mm)
(mm)
dimension
dimension
6.35
0.8
9.0
9.2
6.5
9.52
0.8
13.0
13.5
9.7
12.70
0.8
16.2
16.0
12.9
D
dimension
13
20
20
Flare nut
width
17
22
24
2. Procedure and precautions for flare connection
a. Check to make sure there is no scratches, dust, etc., on the flare and union.
b. Align the flared surface with the axial center of the union.
c. Use a torque wrench, and tighten to the specified torque. The tightening torque for R410A is the same as the conventional
torque value for R22. Be careful, because if the torque is too weak, it may lead to a gas leak. If it is too strong, it may split
the flare nut or make it impossible to remove the flare nut.
Nominal
diameter
1/4
3/8
1/2
Table 15 R410A tightening torque
Outside
Tightening torque
diameter (mm)
N.m (kgf.cm)
6.35
14 - 18 (140 - 180)
9.52
33 - 42 (330 -420)
12.70
55 (550)
Torque wrench tightening torque
N.m (kgf.cm)
18 (180)
42 (420)
55 (550)
10.3.3. Storing and Managing Piping Materials
1. Types of piping and their storage
The following is a general classification of the refrigerant pipe materials used for ACs.
Because the gas pressure of R410A is approximately 1.6 times as high as that of R22, copper pipes with the thickness shown
in Table 10, and with minimal impurities must be used. Care must also be taken during storage to ensure that pipes are not
crushed, deformed, or scratched, and that no dust, moisture or other substance enters the pipe interior. When storing sheathed
copper pipes or plain copper pipes, seal the openings by pinching or taping them securely.
2. Makings and management
a. Sheathed copper pipes and copper-element pipes
When using these pipes, check to make sure that they are the stipulated thickness. For flare nuts, be sure to used the same
nut that is used on the AC unit.
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b. Copper pipes
Use only copper pipes with the thickness given in table 10, and with minimal impurities. Because the surface of the pipe is
exposed, you should take special care, and also take measures such as marking the pipes to make sure they are easily
distinguished from other piping materials, to prevent mistaken use.
3. Precautions during refrigerant piping work
Take the following precautions on-site when connecting pipes. (Keep in mind that the need to control the entry of moisture and
dust is even more important that in conventional piping).
a. Keep the open ends of all pipes sealed until connection with AC equipment is complete.
b. Take special care when doing piping work on rainy days. The entering of moisture will degrade the refrigerating machine oil,
and lead to malfunctions in the equipment.
c. Complete all pipe connections in as short a time as possible. If the pipe must be left standing for a long time after removing
the seal, it must be thoroughly purged with nitrogen, or dried with a vacuum pump.
10.4. Installation, Transferring, Servicing
10.4.1. Inspecting Gas Leaks with a Vacuum Pump for New Installations (Using New
Refrigerant Piping)
1. From the viewpoint of protecting the global environment, please do not release refrigerant into the atmosphere.
a. Connect the projecting side (pin-pushing side) of the charging hose for the manifold gauge to the service port of the 3-way
valve. (1)
b. Fully open the handle Lo of the manifold gauge and run the vacuum pump. (2) (If the needle of the low-pressure gauge
instantly reaches vacuum, re-check step a).)
c. Continue the vacuum process for at least 15 minutes, then check to make sure the low-pressure gauge has reached -0.1
MPa (-76 cmHg). Once the vacuum process has finished, fully close the handle Lo of the manifold gauge and stop the
vacuum pump operation, then remove the charging hose that is connected to the vacuum pump adaptor. (Leave the unit in
that condition for 1-2 minutes, and make sure that the needle of the manifold gauge does not return.) (2) and (3)
d. Turn the valve stem of the 2-way valve 90° counter-clockwise to open it, then, after 10 seconds, close it and inspect for a
gas leak (4)
e. Remove the charging hose from the 3-way valve service port, then open both the 2-way valve and 3-way valve. (1) (4) (Turn
the valve stem in the counter-clockwise direction until it gently makes contact. Do not turn it forcefully).
f. Tighten the service port cap with a torque wrench (18 N.m (1.8 kgf.m)). (5) Then tighten the 2-way valve and 3-way valve
caps with a torque wrench (42 N.m (4.2 kgf.m)) or (55 N.m (5.5 kgf.m)). (6)
g. After attaching each of the caps, inspect for a gas leak around the cap area. (5) (6)
Precautions
• Be sure to read the instructions for the vacuum pump,
vacuum pump adaptor and manifold gauge prior to use,
and follow the instructions carefully.
• Make sure that the vacuum pump is filled with oil up to
the designated line on the oil gauge.
• The gas pressure back flow prevention valve on the
charging hose is generally open during use. When you
are removing the charging hose from the service port, it
will come off more easily if you close this valve.
Fig. 12 Vacuum pump air purging configuration
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10.4.2. Transferring (Using New Refrigerant Piping)
1. Removing the unit
a. Collecting the refrigerant into the outdoor unit by pumping down
The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even when the
temperature of the room is low.
• Check to make sure that the valve stems of the 2-way valve and 3-way valve have been opened by turning them counterclockwise. (Remove the valve stem caps and check to see that the valve stems are fully opened position. Always use
a hex wrench (with 4-mm opposing sides) to operate the valve stems.)
• Press the TEST RUN button on the indoor unit, and allow preliminary operation for 5-6 minutes. (TEST RUN mode)
• After stopping the operation, let the unit sit for about 3 minutes, then close the 2-way valve by turning the valve stem in
the clockwise direction.
• Press the TEST RUN button on the indoor unit again, and after 2-3 minutes of operation, turn the valve stem of the 3way valve quickly in the clockwise direction to close it, then stop the operation.
• Tighten the caps of the 2-way valve and 3-way valve to the stipulated torque.
• Remove the connection pipes (liquid side and gas side).
b. Removing the indoor and outdoor units.
• Disconnect the pipes and connecting electric cables from between the indoor and outdoor units.
• Put capped flare nuts onto all of the pipe connections of the indoor and outdoor units, to make sure no dust or other
foreign matter enters.
• Remove the indoor and outdoor units.
2. Installing the unit
Install the unit using new refrigerant piping. Follow the instructions in section 4.1 to evacuate the pipes connecting the indoor
and outdoor units, and the pipes of the indoor unit, and check for gas leaks.
10.4.3. AC Units Replacement (Using Existing Refrigerant Piping)
When replacing an R410A AC unit with another R410A AC unit, you should re-flare the refrigerant piping. Even though the
replacement AC unit uses the R410A, problems occur when, for example, either the AC unit maker or the refrigerating machine oil
is different.
When replacing an R22 AC unit with an R410A AC unit, the following checks and cleaning procedures are necessary but are
difficult to do because of the chemical characteristics of the refrigerating machine oil (as described in items c) and d) of section
About R410A Refrigerant). In this case, you should use new refrigerant piping rather than the existing piping.
1. Piping check
Because of the different pressure characteristics of R22 and R410A, the design pressure for the equipment is 1.6 times
different. the wall thickness of the piping must comply with that shown in Table 10, but this is not easy to check. Also, even if
the thickness is correct, there may be flattened or bent portions midway through the piping due to sharp curves. Buried sections
of the piping also cannot be checked.
2. Pipe cleaning
A large quantity of refrigerating machine oil (mineral oil) adheres to existing pipes due to the refrigeration cycle circulation. If the
pipes are used just as they are for the R410A cycle, the capacity will be lowered due to the incompatibility of this oil with the
R410A, or irregularities may occur in the refrigeration cycle. For this reason, the piping must be thoroughly cleaned, but this is
difficult with the present technology.
10.4.4. Refrigerant Compatibility (Using R410A Refrigerant in R22 ACs and Vice Versa)
Do not operate an existing R22 AC with the new R410A refrigerant. Doing so would result in improper functioning of the equipment
or malfunction, and might lead to a major accident such as an explosion in the refrigeration cycle. Similarly, do not operate an
R410A AC with R22 refrigerant. The chemical reaction between the refrigerating machine oil used in R410A ACs and the chlorine
that is contained in R22 would cause the refrigerating machine oil to degrade and lead to malfunction.
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10.4.5. Recharging Refrigerant During Servicing
When recharging is necessary, insert the specified amount of new refrigerant in accordance with the following procedure.
1. Connect the charging hose to the service port of the outdoor unit.
2. Connect the charging hose to the vacuum pump adaptor. At this time, fully open the 2-way valve and 3-way valve.
3. Fully open the handle Lo of the manifold gauge, turn on the power of the vacuum pump and continue the vacuum process for
at least one hour.
4. Confirm that the low pressure gauge shows a reading of -0.1 Mpa (-76 cmHg), then fully close the handle Lo, and turn off the
vacuum pump. Wait for 1-2 minutes, then check to make sure that the needle of the Low pressure gauge has not returned. See
Fig. 13 for the remaining steps of this procedure.
5. Set the refrigerant cylinder onto the electronic scale, then connect the hose the cylinder and to the connection port for the
electronic scale. (1)(2)
Precaution:
Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can charge the liquid
without having to turn the cylinder around
6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connection port of the
electronic scale. (2)(3)
7. Open the valve of the refrigerant cylinder, then open the charging valve slightly and close it. Next, press the check valve of the
manifold gauge and purge the air. (2)(4) (Watch the liquid refrigerant closely at this point.)
8. After adjusting the electronic scale to zero, open the charging valve, then open the valve Lo of the manifold gauge and charge
with the liquid refrigerant. (2)(5) (Be sure to read the operating instructions for the electronic scale.)
9. If you cannot charge the stipulated amount, operate the unit in the cooling mode while charging a little of the liquid at a time
(about 150 g/time as a guideline). If the charging amount is insufficient from one operation, wait about one minute, then use the
same procedure to do the liquid charging again.
Precaution:
Never use the gas side to allow a larger amount of liquid refrigerant to be charged while operating the unit.
10. Close the charging valve, and after charging the liquid refrigerant inside the charging hose, fully close the valve Lo of the
manifold gauge, and stop the operation of the unit. (2)(5)
11. Quickly remove the charging hose from the service port. (6) If you stop midway through, the refrigerant that is in the cycle will
be discharged.
12. After putting on the caps for the service port and operating valve, inspect around the caps for a gas leak. (6)(7)
Fig. 13 Re-charging refrigerant
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10.4.6. Brazing
As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person.
In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting
dry nitrogen gas (N2) flow.
<Brazing Method for Preventing Oxidation>
1. Attach a reducing valve to the nitrogen gas cylinder.
2. Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas
from flowing backward.
3. When the nitrogen gas is flowing, be sure to keep the piping end open.
4. Adjust the flow rate of nitrogen gas so that it is lower than 0.05 m3/h, or 0.02 MPa (0.2 kgf/cm2) by means of the reducing valve.
5. After taking the steps above, keep the nitrogen gas flowing until the piping cools down to a certain extent (i.e. temperature at
which pipes are touchable with finger).
6. Completely remove the flux after brazing.
Fig. 14 Prevention of Oxidation during Brazing
Cautions during brazing
1. General Cautions
a. The brazing strength should be high as required.
b. After operation, airtightness should be kept under pressurized condition.
c. During brazing do not allow component materials to become damaged due to overheating.
d. The refrigerant pipe work should not become blocked with scale or flux.
e. The brazed part should not restrict the flow in the refrigerant circuit.
f. No corrosion should occur from the brazed part.
2. Prevention of Overheating
Due to heating, the interior and exterior surfaces of treated metal may oxidize. Especially, when the interior of the refrigerant
circuit oxidizes due to overheating, scale occurs and stays in the circuit as dust, thus exerting a fatally adverse effect. So,
make brazing at adequate brazing temperature and with minimum of heating area.
3. Overheating Protection
In order to prevent components near the brazed part from overheating damage or quality deterioration due to flame or heat,
take adequate steps for protection such as (1) by shielding with a metal plate, (2) by using a wet cloth, and (3) by means
of heat absorbent.
4. Movement during Brazing
Eliminate all vibration during brazing to protect brazed joints from cracking and breakage.
5. Oxidation Preventative
In order to improve the brazing efficiency, various types of antioxidant are available on the market. However, the
constituents of these are widely varied, and some are anticipated to corrode the piping materials, or adversely affect HFC
refrigerant, lubricating oil, etc. Exercise care when using an oxidation preventive.
10.4.7. Servicing Tips
The drier must also be replaced whenever replacing the refrigerant cycle parts. Replacing the refrigerant cycle parts first
before replacing the drier. The drier is supplied in a vacuum pack. Perform brazing immediately after opening the vacuum
pack, and then start the vacuum within two hours. In addition, the drier also needs to be replaced when the refrigerant has
leaked completely. (Applicable for drier models only)
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11 Installation Instructions
11.1. Safety Precautions
• Read the following “SAFETY PRECAUTIONS” carefully before installation.
• Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit
for the model to be installed.
• The caution items stated here must be followed because these important contents are related to safety. The meaning of each
indication used is as below.
Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the
following indications.
WARNING
CAUTION
This indication shows the possibility of causing death or serious injury.
This indication shows the possibility of causing injury or damage to properties only.
The items to be followed are classified by the symbols:
Symbol with background white denotes item that is PROHIBITED from doing.
• Carry out test running to confirm that no abnormality occurs after the installation. Then, explain to user the operation, care and
maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.
WARNING
1. Engage dealer or specialist for installation. If installation done by the user is defective, it will cause water leakage, electrical shock or fire.
2. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electrical shock or fire.
3. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or
electrical shock.
4. Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly
done, unit will drop and cause injury.
5. For electrical work, please follow the local national wiring standard & regulation and this installation instructions. An independent circuit
and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock
or fire.
6. Use the specified cable and connect tightly for indoor/outdoor connection. Please clamp the cable firmly so that no external force will be
acted on the terminal. If connection or fixing is not perfect, it will cause heat-up or fire at the connection.
7. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will
cause heat-up at connection point of terminal, fire or electrical shock.
8. When carrying out piping connection, please take care not to let air or other substances other than the specified refrigerant go into
refrigeration cycle. Otherwise, it will cause lower capacity, abnormal high pressure in the refrigeration cycle, explosion and injury.
9. When connecting the piping, do not allow air or any substances other than the specified refrigerant (R410A) to enter the
refrigeration cycle. Otherwise, this may lower the capacity, cause abnormally high pressure in the refrigeration cycle, and
possibly result in explosion and injury.
10. • When connecting the piping, do not use any existing (R22) pipes and flare nuts. Using such same may cause
abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. Use only
R410A materials.
• Thickness of copper pipes used with R410A must be more than 0.8 mm. Never use copper pipes thinner than 0.8
mm.
• It is desirable that the amount of residual oil is less than 40 mg/10 m.
11. Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with
other electrical appliances. Otherwise, it will cause fire or electrical shock.
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CAUTION
1. This equipment must be earthed. It may cause electrical shock if grounding is not perfect.
2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at
surrounding of the unit, it may cause fire.
3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the
furniture.
ATTENTION
1. Selection of the installation location and installation.
Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.
2. Power supply connection to the room air conditioner.
Connect the power supply cord of the room air conditioner to the mains using one of the following method.
Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency.
In some countries, permanent connection of this room air conditioner to the power supply is prohibited.
1. Power supply connection to the socket using a power plug.
Use an approved 15A power plug with earth pin for the connection to the socket.
2. Power supply connection to a circuit breaker for the permanent connection. Use an approved 16A circuit breaker for the permanent
connection. It must be a double pole switch with a minimum 3.5 mm contact gap.
3. Do not release refrigerant.
Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the
liquid refrigerant, it may cause frostbite.
4. Installation work.
It may need two people to carry out the installation work.
5. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.
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Attached accessories
Applicable piping kit
CZ-4F5, 7, 10BP
Select the best location
OUTDOOR UNIT
• If an awning is built over the unit to prevent direct
sunlight or rain, be careful that heat radiation from
the condenser is not obstructed.
• There should not be any animal or plant which could
be affected by hot air discharged.
• Keep the spaces indicated by arrows from wall,
ceiling, fence or other obstacles.
• Do not place any obstacles which may cause a short
circuit of the discharged air.
• If piping length is over 10m, additional refrigerant
should be added as shown in the table.
• This illustration is for explanation purposes only.
The indoor unit will actually face a different way.
11.2. Indoor Unit
11.2.1. SELECTING THE LOCATION FOR THE INDOOR UNIT
Provide a check port on the piping side ceiling for repair and maintenance.
• Install the indoor unit once the following conditions are satisfied and after receiving the customer approval.
1. The indoor unit must be within a maintenance space.
2. The indoor unit must be free from any obstacles in path of the air inlet and outlet, and must allow spreading of air throughout
the room.
3. Recommended installation height for indoor unit shall be at least 2.5 m.
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* If the height from the floor to ceiling exceeds three meters, air flow distribution deteriorates and the effect is decreased.
WARNING
4. The installation position must be able to support a load four times the indoor unit weight.
5. The indoor unit must be away from heat and steam sources, but avoid installing it near an entrance.
6. The indoor unit must allow easy draining.
7. The indoor unit must allow easy connection to the outdoor unit.
8. Place the indoor unit according to the height from the ceiling shown in the illustration below.
9. The indoor unit must be from at least 3m away from any noise-generating equipment. The electrical wiring must be shielded
with a steel conduit.
10. If the power supply is subject to noise generation, add a suppressor.
11. Do not install the indoor unit in a laundry. Electric shocks may result.
NOTE
− Thoroughly study the following installation locations
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the turbo fan, the fin
of the heat exchanger and the drain pump, resulting in heat exchange reduction, spraying, dispersing of water drops,
drain pump malfunction, etc.
In these cases, take the following actions:
− Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient capacity so that it draws
oily steam which should not flow into the suction of the air conditioner.
− Make enough distance from the cooking room to install the air conditioner in such place where it may not suck in oily
steam.
2. Avoid installing the air conditioner in such circumstances where cutting oil mist or iron powder exist especially in
factories, etc.
3. Avoid places where inflammable gas is generated, flows-in, contaminated, or leaked.
4. Avoid places where sulphurous acid gas or corrosive gas can be generated.
5. Avoid places near high frequency generators.
Model Name
CS-E15DB4**
CS-E21DB4**
CS-E18DB4**
Height in the ceiling
280 mm or more
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11.2.2. INSTALLATION OF INDOOR UNIT
This air conditioner uses a drain up motor. Horizontally install
the unit using a level gauge.
CEILING OPENING DIMENSIONS AND HANGING BOLT
LOCATION
The paper model for installation expand or shrink according to
temperature and humidity.
Check on dimensions before using it.
CAUTION
During the installation, care must be taken not to
damage electric wires.
• The dimensions of the paper model for installations the
same as those of the ceiling opening dimensions.
• Be sure to discuss the ceiling drilling work with the workers
concerned.
POSITIONS OF AIR CONDITIONER BODY AND CEILING SURFACE
11.2.3. REFRIGERANT PIPING
Refrigerant is charged to the outdoor unit. For details, see the
manual for installation work of outdoor unit. (Additional
charging, etc.)
1. Brazing for piping.
a. Execute brazing before tightening the flare nut.
b. Brazing must be executed while blowing nitrogen gas.
(This prevents generation of oxidized scale in copper
pipe.)
2. When there is a lot of brazings for long piping, install a
strainer midway of the piping. (The strainer is locally
supplied.)
3. Use clean copper pipe with inner wall surface free from mist
and dust. Blow nitrogen gas or air to blow off dust in the
pipe before connection.
4. Form the piping according to its routing. Avoid bending and
bending back the same piping point more than three times.
(This will result in hardening of the pipe).
5. After deforming the pipe, align centers of the union fitting of
the indoor unit and the piping, and tighten them firmly with
wrenches.
6. Connect pipe to the service valve or ball valve which is
located below the outdoor unit.
7. After completed the piping connection, be sure to check if
there is gas leakage in indoor and outdoor connection.
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Vacuum drying
After completing the piping connection, execute vacuum drying for the connecting piping and the indoor unit.
The vacuum drying must be carried out by using the service ports of both the liquid and gas side valves.
CAUTION Use two wrenches and tighten with regular torque
ø6.35 mm
ø9.52 mm
18 (180)
42 (430)
Flare nut fastening torque N·m (kgf·cm)
ø12.7 mm
55 (560)
ø19.05 mm
ø15.88 mm
65 (660)
Liquid size piping
ø6.35 mm (1/4”)
100 (1020)
Gas side piping
ø12.7 mm (1/2”)
11.2.4. INDOOR UNIT DRAIN PIPING
• Drain piping must have down-slope (1/50 to 1/100); be sure not to provide up-and-down slope to prevent reversal flow.
• Be sure to check no air trap and to ensure smooth water flow and no abnormal.
• During drain piping connection, be careful not to exert extra force on the drain port at the indoor unit.
• The outside diameter of the drain connection at the indoor unit is 32mm.
Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings.
• Be sure to perform heat insulation on the drain piping.
Heat insulation material: Polyvinylene foam with thickness more than 8 mm (local supply).
• The height of drain may be possible up to 750 mm.
Drain Test
• When drain set piping, install as shown in the figure below.
The air conditioner uses a drain up motor to drain water. Use the following procedure to test the drain up motor operation.
• Connect the main drain pipe to exterior and leave it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for leakage.
• Be sure to check the drain up motor for normal operating and noise when electric wiring is complete.
• When the test is complete, connect the flexible drain hose to the drain port.
• Pour about 600-700cc of water in the drain pan of the indoor unit. (Pour from the position specified in the drawing by using a
water supply bottle or other suitable tool.)
• Press the drain pump test run on pcb to start the drain motor, and verity water drainage.
(The drain motor will automatically stop after operating for about five minutes.)
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11.2.5. HEAT INSULATION
CAUTION Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads
to water leakage.
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).
2. Precautions in high humidity circumstance.
This air conditioner has been tested according to the “JIS Standard Conditions with Mist” and have been confirmed that there
are no faults. However, if it is operated for a long time in high humid atmosphere (dew point temperature: more than 23°C),
water drops are liable to fall. In this case, add heat insulation material according to the following procedure:
• Heat insulation material to be prepared Adiabatic glass wool with thickness 10 to 20 mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8 mm) for refrigerant piping (gas piping: thick piping) and
drain piping, add a further of 10 mm to 30 mm thickness material.
Wall seal
• When the outdoor unit is installed on a higher position
than the indoor unit, install the trap so as not to instill
rain water into the wall by transmitting in piping.
• Stuff the space among piping, the electric wire, and- the
drain hose with “Putty” and seal the penetration wall
hole.
Make sure that rain water do not instill into the wall.
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11.2.6. CONNECTING THE CABLE TO THE INDOOR
• Remove the mounting screw, remove the control box cover,
and then connect the wires by following the procedure given
in the illustration.
Earth lead wire shall be longer than other wires as shown in
the figure for the electrical safety in case of the slipping out
of the cord from anchorage.
11.2.7. INSTALLATION OF DECORATIVE PANEL
The decorative panel has its installation direction. Confirm the direction by displaying the piping side.
1. Remove the air inlet grille by moving the catchers to center.
2. Fitting the decorative panel
• Temporarily secure the fixing screws (3 pcs.) before fitting
the decorative panel. (For temporarily securing the front
grille.)
• Place decorative panel on the screws (3 pcs.) before fitting,
move decorative panel as illustrated and tighten all the
screws (4 pcs.).
CAUTION
• Check before hand the height from the ceiling to the
unit.
• The front grille fitting direction is determined by the unit
direction.
• Only use the screws with the length of 35mm which is
provided, to fix the decorative panel.
• Do not use other screw which is longer it may cause
damage to the drain-pan and other components.
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3. Fit the decorative panel and ceiling wall together and confirm no gap in between. Readjust indoor unit height, if there is a gap
between ceiling wall and decorative panel.
4. Open the indoor control box cover. (2 pcs)
5. Insert firmly the connector of cosmetic louver to indoor
pcb CN-STM1, CN-DISP and CN-STM2.
Be caution not to clamp the cord in between control board
and control board cover.
6. After complete, install back removed part follow opposite
procedure.
WARNING Be sure to hook the air inlet grill string, to prevent
grill from falling and causing injury from it.
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11.3. Outdoor Unit
11.3.1. SELECT THE BEST LOCATION
(Refer to “Select the best location” section)
11.3.2. INSTALL THE OUTDOOR UNIT
• After selecting the best location, start installation according
to Indoor/Outdoor Unit Installation Diagram.
1. Fix the unit on concrete or rigid frame firmly and horizontally
by bolt nut. (ø10 mm).
2. When installing at roof, please consider strong wind and
earthquake. Please fasten the installation stand firmly with
bolt or nails.
11.3.3. CONNECTING THE PIPING
Connecting The Piping To Indoor Unit
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe. (In case of using long
piping)
Connect the piping
• Align the center of piping and sufficiently tighten the flare
nut with fingers.
Piping size (Torque)
Gas
Liquid
1/2” (55 N.m)
1/4” (18 N.m)
• Further tighten the flare nut with torque wrench in specified
torque as stated in the table.
Connecting The Piping To Outdoor Unit
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut
(located at valve) onto the copper pipe.
Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table.
CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder entering the pipe.
3. Please make flare after inserting the flare nut onto the copper pipes.
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11.3.4. EVACUATION OF THE EQUIPMENT
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the
following procedure.
1. Connect a charging hose with a push pin to the Low and High side of a charging set and the service port of the 3-way valve.
• Be sure to connect the end of the charging hose with the push pin to the service port.
2. Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump and vacuum pump adaptor.
3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmHg (0 MPa) to
-76 cmHg (-0.1 MPa). Then evacuate the air approximately ten minutes.
4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not
move after approximately five minutes.
Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at torque of 18 N.m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal
wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
• Be sure to check for gas leakage.
CAUTION
• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 3 above take the following measure:
• If the leak stops when the piping connections are tightened further, continue working from step 3.
• If the leak does not stop when the connections are retightened, repair the location of leak.
• Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause
frostbite.
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11.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT
(FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT)
1. Remove the control board cover from the unit by loosening the screw.
2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 4 × 1.5 mm2 flexible cord,
type designation 245 IEC 57 or heavier cord.
3. Secure the cable onto the control board with the holder (clamper).
4. Cable connection to the power supply through knife switch (Disconnecting means).
• Connect the approved polychloroprene sheathed power supply cable (3 x 2.5 mm2), type designation 245 IEC 57 or heavier
cord to the terminal board, and connect the other end of the cable to knife switch (Disconnecting means).
Note: Knife switch (Disconnecting means) should have minimum 3.5 mm contact gap.
− Secure the cable onto the control board with the holder (clamper).
11.3.6. PIPE INSULATION
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap
the insulated piping end to prevent water from going inside the piping.
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM
with thickness 6 mm or above.
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
• If a drain elbow is used, the unit should be placed on a
stand which is taller than 3 cm.
• If the unit is used in an area where temperature falls below
0°C for 2 or 3 days in succession, it is recommended not to
use a drain elbow, for the drain water freezes and the fan
will not rotate.
AUTO SWITCH OPERATION
The following operations can be performed by pressing the
“AUTO” switch.
1. AUTO OPERATION MODE
The Auto operation will be activated immediately once the
Auto Switch is pressed.
2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING
PURPOSE)
The Test Run operation will be activated if the Auto Switch
is pressed continuously for more than 5 sec. to below 8 sec.
A “beep” sound will occur at the fifth sec., in order to identify
the starting of Test Run operation.
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CHANGING THE REMOTE CONTROL TRANSMISSION
CODE
1. Press AUTO SW continuously for 11 seconds (buzzer
sound = pep pep pep)
2. After 11 seconds, release AUTO SW, then press RemoCon TIMER “ ” SW continuously for 5 seconds. Reset
code will be transmitted. After the reset code is transmitted,
release TIMER “ ” SW.
3. Press Remo-Con “OFF/ON” button. The new Remo-Con
No. will be accepted and memorized, after which the new
Remo-Con No. can be used.
REMO-CON NO. CHANGE IN REMOTE CONTROL
1. Remove the batteries from the battery compartment of the
Remote Control.
2. On the left side of the battery compartment, there is a small
opening in the centre in which Jumper (J_A) can be seen.
In the accepted Remo-Con PCB shown beside, Jumper
(J_B) can be seen.
J_A
Short
Open
Short
Open
J_B
Open
Open
Short
Short
Remo-Con No.
A (Default)
B
C
D
CHECK ITEMS
Is there any gas leakage at flare nut connections?
Is the cooling operation normal?
Has the heat insulation been carried out at flare nut
connections?
Is the indoor unit property secured to the installation plate?
Is the power supply voltage complied with rated value?
Is the connecting cable being fixed to the terminal board
firmly?
Is the connecting cable being clamped firmly?
Is there any abnormal sound?
Is the thermostat operation normal?
Is the drainage OK?
Is the remote control’s LCD operation normal?
Is the Earth wire connection properly done?
HAND OVER
• Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature
control, etc.)
As to parts to be sold separately
• With regards to installation of the parts sold separately, follow the installation manual which is provided with the parts sold
separately.
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12 Servicing Information
Caution:
• Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use
a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).
• Pb free solder will tend to splash when heated too high (about 1100° F/600°C).
12.1. Troubleshooting
1. Rated Frequency Operation
During troubleshooting and servicing, rated compressor operating frequency must be obtained in order to check the
specification and technical data. Below are the methods used to obtain rated compressor operating specification.
(a) Cooling
(i) Press the Auto button continuously for 5 seconds or less than 8 seconds, the air conditioner starts operation at Cooling rated frequency.
(“beep” will be heard at the 5th second.)
(ii) Short the service terminal (CN-S) of the outdoor printed circuit board. The operation of air conditioner is Cooling rated frequency.
(b) Heating
Press the Auto button continuously for 8 seconds or less than 11 seconds, the air conditioner starts operation at Heating rated
frequency. (“beep” “beep” will be heard at the 8th second.)
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2. Troubleshooting Air Conditioner
Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are
no electrical problems before inspecting the refrigeration
cycle. Such problems include insufficient insulation,
problem with the power source, malfunction of a
compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the
standard values for them are shown in the table to the right.
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1. Relationship between the condition of the air conditioner and pressure and electric current
Cooling Mode
Condition of the air
conditoner
Low Pressure
High Pressure
Heating Mode
Electric current
during operation
Low Pressure
High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation
deficiency of the
outdoor unit
Inefficient compression
• Carry on the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
12.2. Breakdown Self Diagnosis Function
Once abnormality detected during operation, the unit will immediately stop its operation (Timer LED is blinking) and maximum of
three error codes (abnormality) will be saved in memory. The abnormality of the operation can be identified through the below
breakdown diagnosis method:
• Press “CHECK” button at remote control continuously for more than five seconds to turn on the diagnosis mode, “H11” will be
displayed at remote control.
• By pressing the TMER “
displayed.
” button once, next error code will be displayed; press “V” button once, previous error code will be
• If error code displayed matches the error code saved in unit memory (abnormality detected), “beep, beep, beep....” sounds will
be heard for 4 seconds and Power LED will light on. Otherwise, one “beep” sound is heard.
If “CHECK” button is press again or without any operation for 30 seconds, the diagnosis mode will turn off.
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Error Codes Table
Diagnosis
display
H11
H12
H14
H15
H16
Abnormality / Protection control
Abnormality
Judgement
Emergency
operation
Primary location to verify
• Internal / external cable connections
Indoor / outdoor abnormal
communication
> 1 min after starting Indoor fan operation
operation
only
Connection capability rank abnormal
Indoor intake air temperature sensor
abnormality
Outdoor compressor temperature sensor
abnormality
Outdoor Current Transformer open
circuit
—
Continue for 5 sec.
—
—
Continue for 5 sec.
—
—
—
• Indoor / Outdoor PCB
—
• Intake air temperature sensor
(defective or disconnected)
• Compressor temperature sensor
(defective or disconnected)
• Outdoor PCB
—
—
• IPM (Power transistor) module
• Indoor PCB
Continue for 5 sec.
—
O
(Cooling only)
O
H19
Indoor fan motor merchanism lock
H21
H23
Indoor float switch operation abnormal
Indoor heat exchanger temperature
sensor abnormality
Outdoor air temperature sensor
abnormality
Outdoor heat exchanger temperature
sensor abnormality
—
Continue for 5 sec.
Continue for 5 sec.
O
Continue for 5 sec.
—
—
—
—
—
• Indoor/Outdoor supply voltage
—
H38
H97
Discharge temperature sensor
abnormality
Indoor/Outdoor wrong connection
Indoor drain water adverse current
abnormal
Indoor/Outdoor mismatch (brand code)
Outdoor Fan Motor lock abnormality
• Fan motor
—
• Heat exchanger temperature sensor
(defective or disconnected)
• Outdoor temperature sensor
(defective or disconnected)
• Outdoor heat exchanger
temperature sensor (defective or
disconnected)
• Discharge temperature sensor
—
—
—
—
—
• Outdoor PCB
H98
Indoor high pressure protection
—
—
• Outdoor Fan Motor
• Air filter dirty
H99
Indoor heat exchanger anti-freezing
protection
—
—
• Air circulation short circuit
• Insufficient refrigerant
F11
Cooling / Heating cycle changeover
abnormality
4 times occurance
within 30 minutes
—
• Air filter dirty
• 4-way valve
F90
PFC control
—
• V-coil
• Voltage at PFC
F91
Refrigeration cycle abnormality
4 times occurance
within 10 minutes
7 times occurance
continuously
—
• No refrigerant
F93
Outdoor compressor abnormal revolution
—
(3-way valve is closed)
• Outdoor compressor
F95
Cool high pressure protection
—
• Outdoor refrigerant circuit
F96
IPM (power transistor) overheating
protection
4 times occurance
within 20 minutes
4 times occurance
within 20 minutes
—
H27
H28
H30
H33
H35
—
• Excess refrigerant
• Improper heat radiation
F97
Outdoor compressor overheating
protection
4 times occurance
within 20 minutes
—
• IPM (Power transistor)
• Insufficient refrigerant
F98
Total running current protection
3 times occurance
within 20 minutes
—
• Compressor
• Excess refrigerant
F99
Outdoor Direct Current (DC) peak
detection
7 times occurance
continuously
—
• Improper heat radiation
• Outdoor PCB
• IPM (Power transistor)
• Compressor
Note:
“O” - Frequency measured and fan speed fixed.
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep” sound heard
following by pressing the “RESET” button at Remote Control.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error
Codes Table) by using Remote Control or Auto Switch at indoor unit. However, the Remote Control signal receiving sound is
changed from one “beep” to four “beep” sounds.
69
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
12.3. Remote Control
Remote Control Reset
• When the batteries are inserted for the first time or the
batteries are replaced, you may notice the indications at
remote control’s display screen blink continuously and
not functionable. If this condition happens, try to reset
the remote control by pushing the reset terminal with a
pointing device.
• You may also do the reset to erase the setting at remote
control and restore back the default setting.
Setting Remote Control Transmission Code
• There are 4 types of remote control transmission code could be selected. The indoor unit will only operate when received
signal with same transmission code from remote control. This could prevent signal interference when there are 2 or more
indoor unit installed nearby together.
• To change remote control transmission code, short or open jumpers at the remote control printed circuit board.
• Under various setting mode, after select the transmission code combination of remote control, press “Timer Decrement”
button of remote control for 5 seconds to transmit a signal to indoor unit. The transmission code will be stored in EEPROM.
• After signal is received, the various setting mode is cancelled and return to normal operation.
70
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
12.4. Auto OFF/ON Button
• The “Auto OFF/ON” button is used to operate the air conditioner if remote control is misplaced or malfunctioning.
• Auto operation is started once “Auto OFF/ON” button is pressed.
• Forced cooling operation is possible by pressing the “Auto OFF/ON” button for more than 5 seconds where “beep” sound is
heard, then release the button.
• By continuously pressing the “Auto OFF/ON” button, it will enable standby states for Forced Heating Operation, Various Setting
Mode and Individual Correspondence Mode. At standby state, the unit still operates with Forced Cooling Operation.
• Press “Timer Decrement” button of remote control for 5 seconds to activate the standby mode, where “beep” sound is heard.
• In Various Setting Mode, the unit captures remote control transmission code when “Check” button is pressed.
• In Individual Correspondence Mode, press “Check” button at remote control to enter remote control signal receiving sound
selection mode.
Press “Auto OFF/ON” button to trigger the remote control signal receiving sound.
− Short “Beep”: Turn OFF remote control signal receiving sound.
− Long “Beep”: Turn ON remote control signal receiving sound.
• After signal is received, the unit returns to normal operation.
71
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
12.5. Disassembly of Parts
1. Open the Intake Grille from the Front Grille by moving the
catchers to center (Fig. 1).
Fig. 1
2. Remove the Control Board Cover by removing the screws
(Fig. 2).
3. Release the (Fig. 3):
Fig. 2
• CN-STM1 (WHT) connector.
• CN-STM2 (YLW) connector.
• CN-DISP (WHT) connector.
• CN-FM (WHT) connector.
• CN-TH1 (WHT) connector.
• CN-TH2 (BLU) connector.
• CN-DRMTR1 (BLU) connector.
• AC01 (BLK), AC02 (WHT) and CN-DRMTR2 (RED)
from Terminal Board.
• G01 (GRN) screw.
• Two T-BLK connectors.
• CN-T1 (WHT).
Fig. 3
• CN-T2 (YLW).
4. To remove the Electronic Controller, release the 6 hooks
that hold it to the Control Board (Fig. 4).
Fig. 4
72
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
5. Remove the Front Grille by removing the screw A and
screws B, C & D half way open (Fig. 5).
Fig. 5
6. Remove the Air Guider and Drain Pan complete by
removing the screws (Fig. 6).
Fig. 6
7. Remove the Turbo Fan by removing the bolt (Fig. 7).
Fig. 7
8. Remove the Fan Motor by release the Fan Motor lead wire
connectors and Fan Motor screws (Fig. 8).
Fig. 8
73
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
Outdoor Electronic Controller Removal Procedure
• Be save to return the wiring to its original position
1. Remove the top panel and front panel
• There are many high voltage components within the heat
sink cover so never touch the interior during operation.
Wait at least two minutes after power has been turned off.
Fig. 9
2. Remove the Outdoor Electronic Controller
Fig. 10
Fig. 11
Fig. 12
Caution! When handling electronic controller, be careful of
electrostatic discharge.
74
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
13 Technical Data
13.1. Operation Characteristics
13.1.1. CS-E15DB4EW CU-E15DBE
75
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
13.1.2. CS-E18DB4EW CU-E18DBE
76
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
13.1.3. CS-E21DB4ES CU-E21DBE
77
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
13.2. Sensible Capacity Chart
● CS-E15DB4EW CU-E15DBE
Outdoor Temp. (°C)
Indoor wet
bulb temp.
17.0°C
19.0°C
19.5°C
22.0°C
TC
4.07
30
SHC
3.08
IP
1.19
4.46
4.87
3.23
3.35
1.21
1.24
TC
3.80
4.10
4.17
4.55
35
SHC
2.96
3.10
3.22
IP
1.28
1.30
1.31
1.33
TC
3.53
40
SHC
2.84
IP
1.37
TC
3.21
46
SHC
2.70
IP
1.48
3.88
4.23
2.99
3.11
1.40
1.42
3.53
3.85
2.84
2.96
1.51
1.53
TC
4.14
40
SHC
3.33
IP
1.61
TC
3.76
46
SHC
3.16
IP
1.74
4.55
4.95
3.50
3.64
1.64
1.67
4.13
4.50
3.33
3.47
1.77
1.80
TC
5.09
40
SHC
4.09
IP
2.16
TC
4.63
46
SHC
3.89
IP
2.33
5.59
6.09
4.30
4.47
2.20
2.24
5.08
5.53
4.09
4.26
2.37
2.42
● CS-E18DB4EW CU-E18DBE
Outdoor Temp. (°C)
Indoor wet
bulb temp.
17.0°C
19.0°C
19.5°C
22.0°C
TC
4.76
30
SHC
3.61
IP
1.40
5.23
5.70
3.78
3.92
1.43
1.45
TC
4.45
4.80
4.89
5.32
35
SHC
3.46
3.63
3.77
IP
1.51
1.53
1.54
1.56
● CS-E21DB4ES CU-E21DBE
Outdoor Temp. (°C)
Indoor wet
bulb temp.
17.0°C
19.0°C
19.5°C
22.0°C
TC
5.85
30
SHC
4.44
IP
1.88
6.43
7.00
4.65
4.82
1.91
1.95
TC
5.47
5.90
6.01
6.54
35
SHC
4.26
4.46
4.63
IP
2.02
2.05
2.06
2.10
TC - Total Cooling Capacity (kW)
SHC - Sensible Heat Capacity (kW)
IP - Input Power (kW)
Indoor 27°C/19°C
Outdoor 35°C/24°C
78
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
14 Exploded View (Indoor Unit)
14.1. CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
79
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
80
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
14.2. CZ-BT20E (Front Grille Complete)
Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
81
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
15 Replacement Parts List (Indoor Unit)
15.1. CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
REF. NO.
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
21
22
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
40
41
43
44
47
48
48A
51
PARTS NAME & DESCRIPTION
BASE PAN ASS’Y
INNER POLYSTYRENE COMPLETE
CABINET SIDE PLATE ASS’Y
CABINET SIDE PLATE ASS’Y
LEAD WIRE - FAN MOTOR
FAN MOTOR
ANTI - VIBRATION BUSHING
CORD HOLDER
SCREW - FAN MOTOR
TURBO FAN
NUT for TURBO FAN
SP WASHER
WASHER
EVAPORATOR COMPLETE
FLARE NUT (1/2”)
HEATPROOF TUBE
HEATPROOF TUBE
FLARE NUT (1/4”)
PIPE COVER
SENSOR - EVAPORATOR
HOLD SENSOR
EVAPORATOR SUPPORTER
TUBE ASS’Y (CAPIL. TUBE)
DRAIN PUMP COMPLETE
PANEL DRAIN PUMP ASS’Y
DRAIN PUMP
ANTI - VIBRATION BUSHING
FLOAT SWITCH - DRAIN PUMP
FLEXIBLE PIPE
DRAIN NOZZLE
DRAIN HOSE HEAT INSULATION
DRAIN PAN - COMPLETE
DRAIN PLUG
AIR GUIDER BLOWER WHEEL
CONTROL BOARD CASING
ELECTRONIC CONTROLLER (MAIN)
SPACER
TRANSFORMER
TERMINAL BOARD - (3 PIN)
LEADWIRE-AIR TEMP. SENSOR
CONTROL BOARD COVER
ACCESSORY COMPLETE
HEATPROOF TUBE
WIRELESS REMOTE CONTROL COMPLETE
QTY
1
1
1
1
1
1
3
1
3
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
3
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
1
CS-E15DB4EW
CWD52K1100
CWG07C1047
CWE041121
CWE041122
CWA67C5136
EHDS50A40AC
CWH501065
CWD741024
CWH7080300
CWH03K1022
CWH561042
XWA8
XWG8H22
CWB30C1668
CWT251032
CWG021024
CWG021064
CWT251030
CWD93C1050
CWA50C2274
CWH32143
CWD911529A
CWT07K1188
CWB53C1015
CWD93K1008
CWB532043
CWH501080
CWA121215
CWH85C1033
CWH411011
CWG321050
CWH40C1034
CWB821008
CWD321058
CWH10K1048
CWA73C1778
CWH541026
CWA40C1030
CWA28K1076
CWA67C5139
CWH13C1100
CWH82C1270
CWG021025
CWA75C2610
(Note)
• All parts are supplied from PHAAM, Malaysia (Vendor Code: 061).
• “O” marked parts are recommended to be kept in stock.
82
CS-E18DB4EW
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CWA73C1779
←
←
←
←
←
←
←
←
CS-E21DB4ES
←
←
←
←
←
←
←
←
←
←
←
←
←
CWB30C1526
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CWA73C1780
←
←
←
←
←
←
←
←
REMARKS
O
O
O
O
O
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
15.2. CZ-BT20E (Front Grille Complete)
REF. NO.
1
2
4
5
6
7
8
9
10
11
12
13
14
21
22
24
28
29
PART DESCRIPTION
FRONT GRILLE - COMPLETE
FRONE - FRONT GRILLE CO.
A.S MOTOR DC SINGLE 12V 250 OHM
BRACKET - A.S.MOTOR
VANE
SHAFT
SHAFT
CONNECTOR - SHAFT
BEARING
LEAD WIRE - A.S.MOTOR
PLATE COVER FOR A.S.MOTOR
PLATE COVER FOR CONNECTING SHAFT
PLATE COVER FOR END SHAFT
ELECTRONIC CONT. (RECEIVER & INDICATOR)
LEAD WIRE - COMPLETE
INTAKE GRILLE
LEVER ARM
AIR FILTER
QTY
1
1
2
1
4
6
2
4
6
1
1
2
1
1
1
1
2
1
(Note)
• All parts are supplied from PHAAM, Malaysia (Vendor Code: 061).
• “O” marked parts are recommended to be kept in stock.
83
PART NO.
CWE11C3105
CWE11C3353
CWA981105
CWD932522
CWE241159
CWH631038
CWH631045
CWH081007
CWH641008
CWA67C5117
CWD911459
CWD911460
CWD911461
CWA743610
CWA67C5576
CWE221131
CWH651029
CWD001142
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
16 Exploded View (Outdoor Unit)
16.1. CU-E15DBE CU-E18DBE CU-E21DBE
Note:
The above exploded view is for the purpose of parts disassembly and replacement.
The non-numbered parts are not kept as standard service parts.
84
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
17 Replacement Parts List (Outdoor Unit)
17.1. CU-E15DBE CU-E18DBE CU-E21DBE
REF NO.
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
18
19
20
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
56
57
58
59
DESCRIPTION & NAME
CHASSY ASSY
ANTI-VIBRATION BUSHING
COMPRESSOR
NUT-COMPRESSOR MOUNT
SOUND PROOF MATERIAL
FAN MOTOR BRACKET
FAN MOTOR
SCREW - FAN MOTOR BRACKET
SCREW - FAN MOTOR MOUNT
PROPELLER FAN ASSY
NUT - PROPELLER FAN
CONDENSER
TUBE ASS’Y COMPLETE (CAP TUBE/EXP.VALVE)
4 WAYS VALVE
STRAINER
HOLDER - COUPLING
3 WAYS VALVE (GAS)
2 WAYS VALVE (LIQUID)
SOUND PROOF BOARD
TERMINAL COVER
NUT-TERMINAL COVER
SENSOR COMPLETE (COMP. TOP)
HOLDER SENSOR
V-COIL COMPLETE (4-WAYS VALVE)
V-COIL COMPLETE (EXPAND VALVE)
SENSOR COMPLETE (COMP. DISC.)
SENSOR COMPLETE
REACTOR
CONTROL BOARD CASING (SIDE)
TERMINAL BOARD ASSY
FUSE HOLDERS
FUSE
CONTROL BOARD CASING (TOP)
CONTROL BOARD CASING (BOTTOM)
ELECTRONIC CONTROLLER - MAIN
CONTROL BOARD COVER (TOP)
CABINET SIDE PLATE (LEFT)
HANDLE
CABINET SIDE PLATE (RIGHT)
HANDLE
CABINET FRONT PLATE CO.
WIRE NET
CABINET TOP PLATE
CONTROL BOARD COVER (BOTTOM)
CONTROL BOARD COVER (TOP)
OPERATING INSTRUCTION
OPERATING INSTRUCTION
INSTALLATION INSTRUCTION
INSTALLATION INSTRUCTION
INSTALLATION INSTRUCTION
DRAIN HOSE
PACKING
SOUND PROOF MATERIAL
SOUND PROOF MATERIAL
QTY.
1
3
1
3
1
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CU-E15DBE
CWD50K2085
CWH50077
5CS130XAD04
CWH56000
CWG302302
CWD541084
CWA981166
CWH551060
CWH551106
CWH03K1016
CWH56053
CWB32C1583
CWT023679
CWB001026
CWB11094
CWH351035
CWB011170
CWB021292
CWH151050
CWH171001
CWH7080300
CWA50C2185
CWH321010
CWA43C2168
CWA43C2141
CWA50C2180
CWA50C2181
CWA421069
CWH102273
CWA28K1110
K3GB1PH00016
K5D303BBA002
CWH102204
CWH102282
CWA73C1767R
CWH131167
CWE041082A
CWE161010
CWE041083A
CWE16000E
CWE06K1043
CWD041041A
CWE031031A
CWH131168
CWH131169A
CWF564379
CWF564380
CWF612604
CWF612605
CWF612606
CWH5850080
CWB81012
CWG302290
CWG302301
(Note)
• All parts are supplied from PHAAM, Malaysia (Vendor Code: 061).
• “O” marked parts are recommended to be kept in stock.
85
CU-E18DBE
←
←
←
←
←
CWD541054
←
←
←
←
←
CWB32C1527
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CWA73C1768R
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CWG302270
CWG302300
CU-E21DBE
←
←
←
←
←
←
←
←
←
←
←
CWB32C1526
CWT023610
←
←
←
←
CWB021306
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CWA73C1769R
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
REMARKS
O
O
O
O
O
O
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
18 Electronic Circuit Diagram
18.1. Indoor Unit
● CS-E15DB4EW CS-E18DB4EW CS-E21DB4ES
SCHEMATIC DIAGRAM 1/4
MAIN ELECTRONIC CONTROLLER
INDICATOR COMPLETE
IC201
Vout
1
Vcc
2
GND
3
C25
100µ
16V
R203
1k
R202
47
C26
0.1µ
JP5
C202
R03
1k
CN-DISP
SW201
Auto
1
D205
D204
D203
D202
D201
3
POWER
TIMER
POWERFUL
QUIET
AIR SWING
F-TEST
S-TEST
C201
47µF
25V
R201
1k
10
1
9
2
8
3
7
4
6
5
5
6
4
7
3
8
2
9
1
10
C02
0.01µ
JP7 R29
10k
JP6
R14
R11
1k
R35
10kΩ
CN-DISP
BZ
C01
0.01µ
4 SCK
R42
10k
R43
1k
R37
10kΩ
6 D0
R34
10kΩ
360
360
360
RST 8
CS 3
5 D1
C03
0.01µ
R22
1k
R12
10k
2
R38
10kΩ
R21
10k
5.1k
R04
R15
R16
BZ201
HAJEM-A
(XH4)
R28
1k
JP8
BUSY 1
7
IC02
C20
0.01µ
4
3
2
1
C28
0.01µ
CN-STM2
1
1
2
2
3
3
4
4
5
5
VERTICAL
R41
10k
16
SSR02
SSR01
8
1
15
2
14
3
13
4
12
5
11
6
I
C32
0.01µ
7
10
9
IC07
B1HBGFF00005
IC05
B1HBGFF00005
16
CN-STM1
1
1
2
2
3
3
4
4
5
5
8
1
15
2
14
3
13
4
12
5
11
6
10
IC06
C0EBH0000282
R32
100kΩ
7
9
VERTICAL
86
C27
2.2µ
50V
O
5V
G
C15
0.01µ
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 2/4
SW01
R13
10k
C30
0.01µ
High Static
Pressure
c
R60
10kΩ
4.7k b
C34
0.047µ
25V
C35
0.1µ
25V
10k
e
R48
1k
Q01
DTC114EK
R62
1kΩ
C38
R18
R17
R46
10k
360
360
AN15
AN16
AVSS
AN17
NMI
AVREF
INTP0
INTP1
INTP2
INTP3
INTP4
P07
INTP5
RTP02
Vss
RTP03
ADVV 55
Vdd 54
7 SCK
8 RESET
Vss 53
9 Vdd
X2
10
X1
11
Vss
12
P37 52
IC01
UPD784956GC
C23
1µ
R40
P34 49
10k
P36 51
P35 50
P33 48
13 IC(VPP)
14 P90
15 P91
P32 47
T01 46
16 P92
T00 45
17 P93
18 P94
P67 44
P66 43
P65 42
19 P95
20 P40
P62
P63
P57
P60
P61
P55
P56
Vss
P54
P53
P64 41
P52
JP4
6 S0
P47
P50
P51
R30
150k
AN12 58
AN11 57
AN10 56
P45
P46
X01
3 RXD
4 TXD
5 S1
P44
C22
1µ
AN14 60
AN13 59
P43
JP3
C21
1 P16
2 T06
P41
P42
JP2
RTP04
JP1
RTP05
RTP07
RTP06
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
R09
10k
R10
10k
R19
10k
R20
10k
JX1
R27
1k
C10
0.1µ
87
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 3/4
T01
A40C1030
O
O
I
C18
100µF
16V
NR
C16
470µF
25V
5V
G
1
I
C17
3300µF
35V
12V
G
2 DB01
4
3
2
1
2
1
R69
22kΩ
1/4W
CN-V2
C13
470µF
63V
R05
22kΩ
1/4W
C19
L01
C11
0.22µ
C33
2
DB03
4
3
R59
7.5Ω
10W
CN-T2
1
2
ZNR01
511U
C24
SSR01
IC04
1
SSR02
IC03
CN-T1
R61
5.1kΩ
FUSE01
T3.15A L 250V
C37
270µ
450V
R57
1k
R66
82kΩ
1/4W
R65
82Ω
1/4W
R64
82kΩ
1/4W
CR02
DB02
R63
82kΩ
1/4W
CR01
PC05
B3PAA0000209
4
1
2
R55
10k
C31
0.01µ
C05
1µ
C04
1µ
R33
15k
R31
20k
R02
20kΩ
2
4 3
SW02
DRAIN PUMP
TEST RUN
AIR
TEMP
SENSOR
(15k 3950)
2
1
1 2
CN-TH2
FLOAT
SW
88
R26
6.2kΩ 1/4W
3
R23
6.2kΩ 1/4W
R39
160
1
1
C40
1000p
R56
10k
R54
1k
2
CN-V1
C29
1000p
CN-TH1
PIPE
TEMP
SENSOR
(20k 3950)
R36
1k
1
4
2
3
PC03
B3PAA0000209
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 4/4
DRAIN
MOTOR
DRAIN
MOTOR
CN-DRMTR2
CN-DRMTR1
1 2
3
3
1 2
4
AC01(BLK)
C07
4700p
250VAC
C39
100p
250VAC
C08
4700p
250VAC
R45
6.2k
C09
2200p
250VAC
R44
6.2k
G01
(GRN)
1
1
2
2
3
3
AC02
(WHT)
Table 1
High Static Pressure
High
Usual
SW01
ON
OFF
Table 2
Drain Pump Test Run SW
SW02
Table 3
MIST Protection
Without Mist Protection
With Mist Protection
AC03
(RED)
JX1
Jumper
None
D03
PC01
A52LP421GR
4
1
ZD01
2
3
R25
330k
ZD02
R49
620
R24
1.21k
R51
20k
PC02
TLP421
1
4
2
3
R53
5.6k
R50
10k
Q02
C06
1000p
C14
0.22µ
630V
R52
47k
1
2
3
4
5
R67
6.2kΩ 1/4W
C42
100µ
25V
C41
0.01µ
Q03
2SD2531
R47
7.5k
ZD04
ZD03
R68
6.22kΩ 1/4W
R01
1kΩ
4
1
3
2
C36
0.47µ
25V
PC04
B3PAAD000209
e
b
c
Q04
UNR211L
R07
4.75k
R06
10kΩ
C12
22µ
50V
R08
5.62k
89
ZD05
6
7
CN-FM
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
18.2. Outdoor Unit
● CU-E15DBE CU-E18DBE CU-E21DBE
SCHEMATIC DIAGRAM 1/4
REACTOR
GD1
GRY1
GRN
ZNR3
ERZV10D102
RY-AC1
C13
4700p
250V
C4
C5
ZNR6
ERZVEAV511
ZNR4
ERZVEAV511
C8
1.0µ
250V
C7
1.0µ
250V
C11
1.0µ
250V
LJP5
LJP11
LJP9
LJP10
C53
850µ
400V
C52
850µ
400V
LJP6
LJP8
2 3
LJP3
1 LJP2
DB2
RBV-1506
4
AC-WHT
D5~D8
MA165TA5
BLK
HOT2
D5
D7
D6
D8
RY-C
CT1
ETQ19Z59BZ
CR1
RY-HOT
K6B1AGA00096
BLK
HOT1
R70
470Ω
3 DB1
1
2
JP2
JP3
JP4
4-WAYS
VALVE
PC4
TLP421
4
R34
1.65k 1%
R33
698Ω
1%
C
C22
220µ
10V
D10
MA165TA5
E
JP1
1
2
3
C14
4700p
250V
R93
100k
1/4W
R94
100k
1/4W
R95
100k
1/4W
LJP4
RY-PWR
LF
G08902N00D01
AC-BLK
ZNR1
ERZVEAV511
1
2
3
PTC2
FUSE1
(T 3.15A L 250V)
L
N
C47
65µ
350V LJP7
PTC1
ZNR2
ERZVEAV511
FUSE
30A
GRY2
R12
9.1k
1/4W
R16
9.1k
1/4W
R22
9.1k
1/4W
R9
9.1k
1/4W
R13
9.1k
1/4W
R17
9.1k
1/4W
R23
9.1k
1/4W
R27
D1
ERA15-06 R11
DATA
RED
R2
510k
1/4W
R1
510k
1/4W
13k 2W 2
C1
2200p
250V
PC1
TLP421 3
(BL)
R15
1.21k
1%
330k
R29
680Ω
4
3
ZD3
2
4
R20
20k
1%
1
C20
22µ
100V
D12
ZD4
c
R89
10k
Q1
2SC3852 c
e
R26
47k
90
4.7k b
R97
1k
C42
1000P
b
R21
5.6k
R32
100k
2
C30
1500p
D9
ERA15-10
PC2
TLP421(GR)
1
R63
200Ω
ZD2
RD36EB1
ZD1
RD36EB1
1
3
R65
Q3
IMRH50-60 47Ω
e
G
R61
e
10k
Q6
2SA1366
R60 10Ω
c
R58
0.839Ωx2
5W+5W
R8
9.1k
1/4W
4
Q5
c 2SC3441
10k
e
Q2
RT1N432
b
b
PC5
TLP421
4
1
R71
10k
2
3
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 2/4
FUSE2
(T 3.15A L 250V)
R111
464k
1/4W
1%
R114
464k
1/4W
1%
R112
464k
1/4W
1%
R115
464k
1/4W
1%
T1
ET529AK7NLAC
D20
1A5-E
600V
R116
10.7k
1/4W
1%
R113
11k
1/4W
1%
R125
47k
2W
C56
56µ
450V
R190
7.5Ω
3
5W 2
ZNR5
C57
0.22µ
630V
R128
47k
2W
D23
EG01Z
1
2
D21
6
R47
39k
1/4W
R48
39k
1/4W
R53
39k
1/4W
R54
39k
1/4W
R52
39k
1/4W
R51
39k
1/4W
1
4
2
3 TLP620
D33 D34 D35
D28
EX16
L01
R151
510
ZD6
MAZ4047
5
C88
680µ
16V
C96
470µ
10V
D29
AL01Z
C61
22µ
35V
4
R122
0.1Ω
C60
10µ
50V
D25
AL01Z
3
IC7
STR-V152
R46
39k
1/4W
2
C98
470µ
25V
R161
470Ω
2W
IC6
NJM78M05F
I
R136
4.7Ω
1/4W
DB3 4
R49
39k
1/4W
1
R159
3k
1/4W
D31
RL4Z
C68
0.01µ
400V
D22
AM01Z
C59
220P
2kV
1
CN-JP1
R154
3k
1/4W
C94
470µ
25V
D30
EG01Z
4
1
3
2
C65
C89
0.1µ
16V
R140
2.2k
PC6
PC817E7
R126
C115
0.047µ
R141
1k
R144
27k
C67
680P
C75
IC5
MM1431
R62
4.7k
PC3
C100
0.01µ
R5
1.5k
R158
R160
b
R64
4.7k
1
R204
1k
C125
0.047µ
D11
R100
D16 374k 1%
R83
1.8k
7
IC4
C32
10µ
50V
R103
9.53k
1%
5
6
Q12
e
e
10k
Q11
R91
49.9k
C39
0.047µ
25V
IC4
R69
33Ω
1/4W
ZD5
RD10EB2
R82
1.8k
c
RY-C
b
Q7
2SC3441 e
D14
ERA15-01
C41
0.01µ
R80
100Ω
R79
10k
IC3
1
C37
0.047µ
25V
3
2
C40
0.82µ
c
R92
15k
D17
7
IC3
C43
0.01µ
R99
15.0k
1%
91
Q13
4.7k b
C45
1000p
R98
3.74k
1%
R90
100Ω
C55
0.01µ
10k
b 4.7k
C33
1µ
10V
C50
1000p
R104
51.5k
1%
C48
0.01µ
C35
10µ
c
R101
100Ω
R109
11.3k
C44
0.82µ
50V
R110
3.74k
1%
R102
3.74k
5
6
R107
3.74k
1%
C51
1000p
R108
C49 82.5k
0.01µ 1%
C54
0.01µ
R3
39k
Q4
2SC3052
R150
100Ω
2
CN-JP2
C105
220µ
10V
G
R148
18k
1%
R149
3.30k
1%
C85
3900P
50V
C116
100µ
25V
O
5V
R147
1%
1/4W
D36
c RT1N432
4.7k b
10k
e
c
R6
1k
e
C3
0.01µ
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 3/4
C113
0.1µ
C117
0.1µ
D4
C15 D3
3900p
C12
R14
200k
C9
3900p
D13
HRU0103A2
C21
0.1µ
16V
P67/PNM15
P66/PNM14
P65/PNM13
P64/PNM12
P63/PNM11
P62/PNM10
P61
P60
P57/NPNM02
P56/PWN02
P55/NPNM01
P54/PNM01
P53/NPMM00
P52/PMM10
VDD
P51/TM1080
VSS
P50/TM1010
VDD2
VPP
P47/TM10B1
P46/FM10A1
P45/TM9B0
P44/
TM910
P43/
TM9B1
2
3
4
5
6
7
8
R10
1k
9
D2
10
11
C6
0.1µ
16V
12
13
R203
1k
14
15
C124
0.047µ
16
17
18
TH
D4CE35030002
19
20
21
R35
TH
R199
1k
R36
12.1k
C19
1µ
18V
R28
1k
R30
10k
4
23
24
25
C122
0.047µ
C16
0.047µ
25V
CN-CPU
2
22
1
P70
P71
P72
P73
P74/IRQ00
P75/IRQ01
P76/IRQ02
P77/IRQ03
P80/ADIN00
P81/ADIN01
P82/ADIN10
P83/ADIN11
VSS
VREFP84/ADIN20
VREF+
VDD
P85/ADIN21
P86/ADIN22
P87/ADIN23
P90/ADIN24
P91/ADIN25
P92/ADIN26
P93/ADIN27
P94/ADIN28
5
7
10 9
R41
10k
R66
C23
10µ
50V
R43
10k
1k
R76
10k
R7
1k
R37
150k
C118
0.047µ
R201
1k
IC2
BD4844G
C123
0.047µ
R200
1k
I
R197
10k
C24
0.047µ
25V
74
73
72
C121 C110
1µ
10µ
50V 10V
R4
4.99k
1%
R19
15.0k
C120 C111
1µ
10µ
50V 10V
C2
1µ
10V
C31
0.047µ
25V
71
70
69
68
R81
1k
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
R195
10k
R196
10k
R198
10k
R202
1k
C17
1µ
10V
R18
15.8k
C38
0.1µ
16V
R31
4.99k
R78
30k
5
4 3
2
1
ICX1
C34
0.1µ
16V
R77
10k
7 6
R74
10k
R50
1k
1
R/B
RS
8
2
Vcc GND
7
3
CS
DO
6
4
SK
DI
5
C36 C116
0.01µ 220µ
10V
R88
10k
R96
10k
R45
10k
C114
220µ
10V
CN-DIS
3 2
1
2
1
1
2 1
2
CN-S
PIPE
TEMP.
SENSOR
(4.96kΩ 3800)
OUTDOOR
TEMP.
SENSOR
(15kΩ 3950)
TANK
TEMP.
SENSOR
(50kΩ 3950)
92
R55
1k
R56
470Ω
CN-TANK
CN-TH
4 3
R84
10k
R72
2k
O
5V
G
DISCHARGE
TEMP.
SENSOR
(50kΩ 3950)
75
CN-NMODE
X1
C119
0.047µ
C28
0.1µ
16V
R75
1k
R40
10k
C112
0.1µ
16V
C29
0.1µ
16V
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
R68
1k
R67
1k
P42/TM9A1
P41/TM8810
P40/TMA10
P37/TM710
P36/TM610
P35/TM510
VDD
P34/TM410
VSS
P33/TM310
P32/TM210
P31/TM110
P30/TM010
P27/SBI0
P26/SBT0
P25/SBO0
P24/SBI1
P23/SBT1
P22/SBO1
P21/SBT2
P20/SBT2
P17/SBO2
P16
P15
P14/
IRQ08
IC1
MN103S52G
3
6
8
C27
100µ
6.3V
P95/
ADIN29
P96/
ADIN30
P97/ADIN31
TEST3
TEST2
TEST1
VDD
OSCO
OSCI
VSS
PVSS
TCPOUT
PVDD
VDD2
VOUT
VOUT
VDD
VDD
LO
VSS
P67/NRST
P10/IRQ04
P11/IRQ05
P12/IRQ06
P13/IRQ07
1
R44
10k
100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
R24
JX1
SW1
C25
10µ
50V
R38
47k
C18
0.01µ
R25
C26
0.047µ
25V
1 2
1 2
CN-STEST
CN-FTEST
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
SCHEMATIC DIAGRAM 44
D41
C106
0.47µ
630V
Q17
C90
0.047µ 25V
P
HV1C1
2
1
Vcc
IN
C84
1000p
C92
0.047µ 25V
C93
0.047µ 25V
C95
0.047µ 25V
Vcc
IN
COM
14
Vcc U OUT
IC8
TL3472
IN(Y)
21
IN(X)
R182
R184
R186
R192
R194
R187
R191
R193
R176
R185
R174
R177
0.1Ω
R180
R172
C103
0.022µ
25V
N
R183
R167
82.5Ω
R175
C101
0.022µ
25V
R143
1.40k
roc
CF0
GND
R173
C83
10µ
50V
W OUT
R170
C99
0.022µ
25V
15
C91
0.047µ
25V
V OUT
R168
C97
0.1µ
16V
2% 1/4W X20
LED
R118
Q19
RT1P432
10k
4.7k
CN-FM
1
R119
1k
2
e
R134
1k
C72
1000p
Q16
RT1N432
4.7k
R164
10k
R162
c 5.11k
b
Q18
RT1P432
10k
IC11
TD620W3AF 7
6
5
4
3
2
1
C58
1000P
R205
8.0Ω
3
C107
0.022µ
630V
R123
2k
4
5
6
7
C102 R166
10µ 200k
R163
5.11k
9 10
11
12
13
14
15
16
8
BLUE
IN(X)
20
R171
C66
C63
0.047µ
25V
R137
39.2k
YELLOW
R169
1000p x3
R152
20k
C62
10µ
50V
C80
C79
C77
R142
2.49k
CE
LVIC
VFO
IC8
TL3472
W
C
HO
11
18
R132
4.99k
CE
HV1C3
10
9
19
R129
4.99k
W
HO
R178
C71
0.047µ
25V
C69
0.047µ R135
10k
16V
C82
100µ
16V
V
C
Vcc
IN
COM
R127
20k
R124
39.2k
V
RED
12
13
C87
470p
R146
27.4k
U
HV1C2
6
5
C86
470p
D24
R117
332Ω
1%
U
7
8
C76
0.047µ
25V
C70
47µ
25V
CE
COM
D26
C73
47µ
25V
C
HO
COMPRESSOR
C81
0.047µ
25V
R181
C78
47µ
25V
D27
R179
R138
33Ω
2W
C74
47µ
25V
ZD7
3
4
4.7k
C126
C104
R189
10k
C109
0.047µ
25V
Q28
C108
0.047µ 25V
CN-STM
6
RY-HOT
RY-ACL
RY-PWR
R156
7
6
5
4
3
2
1
9 10
11
12
13
14
15
16
8
93
5
4
3
2
1
D37
D38
D39
D40
HRD0103A2 X4
IC10
TD620W3AF
EXPAND
VALVE
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
How to use electronic circuit diagram
TIMER TABLE <INDOOR>
Name
Time
4 way valve abnormality
Outdoor air temp. for Hz No. decision
Anti-dew formation control
Anti-freezing control
Thermo OFF delay
Low pressure control (gas leakage) compressor OFF time
Time delay safety control
4 min.
30 min.
20 min.
6 min.
3 min.
3 min.
2 min. 58 sec.
20 sec.
90 sec.
20 sec.
120 sec.
2 min.
10 sec.
20 sec.
1 hour
120 min.
30 min.
4 min.
30 min.
2 min.
Odour timer status shift time
Intake air temp. sampling time
Self diagnosis display time
Auto mode judgement sampling time
24 hours Real Timer
Heating SSHi fan speed shift
Cooling SHi fan speed shift
Hot start forced completion
Auto mode judgement interval
After Hot start / Deice
Test mode
(When test point
Short-circuited)
24 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
0 sec.
1 min.
12 sec.
3 sec.
0.4 sec.
3 sec.
12 sec.
TIMER TABLE <OUTDOOR>
Name
Time
DC PEAK
30 sec.
120 min.
80 min.
40 min.
40 min.
30 sec.
30 sec.
3 min.
Deice detection
Hz lock time
Outdoor fan delay operation control
4 way valve delay operation control
94
Test mode
(When test point
Short-circuited)
3 sec.
24 sec.
16 sec.
8 sec.
8 sec.
0 sec.
3 sec.
18 sec.
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
18.3. Remote Control
95
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
18.4. Print Pattern
Indoor Unit Printed Circuit Board
96
CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE
18.5. Print Pattern
Outdoor Unit Printed Circuit Board View
97
[PHAAM] Printed in Malaysia