Panasonic CS-C18DKD, CU-C24DKD, CU-C18DKD, CS-C24DKD Service Manual
1 Features 2
2 Functions
3
2.1. Remote Control
3
2.2. Indoor Unit
4
2.3. Outdoor Unit
5
3 Product Specifications
6
3.1. CS-C18DKD CU-C18DKD
6
3.2. CS-C24DKD CU-C24DKD
8
© 2004 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-C18DKD CU-C18DKD
CS-C24DKD CU-C24DKD
4 Dimensions 10
4.1. Indoor Unit & Remote Control
10
4.2. Outdoor Unit
11
5 Refrigeration Cycle Diagram
13
6 Block Diagram
14
7 Wiring Diagram
15
8 Operation Details
17
8.1. Cooling Operation
17
Air Conditioner
CONTENTS
Page Page
Order No. MAC0411054C3
8.2. Soft Dry Operation 18
8.3. Automatic Operation
19
8.4. Operation Control
20
8.5. Indoor Fan Speed Control
23
8.6. Outdoor Fan Speed Control
24
8.7. Vertical Airflow Direction Control
24
8.8. Horizontal Airflow Direction Control
25
8.9. Powerful Operation
25
8.10. Quiet Operation
26
8.11. Ionizer Operation
27
8.12. Timer Control
28
8.13. Random Auto Restart Control
28
8.14. Remote Control Signal Receiving Sound
28
9 Operating Instructions
29
10 Installation Instructions
35
10.1. Safety Precautions
35
10.2. Indoor Unit
38
10.3. Outdoor Unit
42
11 3-way Valve
45
11.1. Air Purging of the Piping and Indoor Unit
46
12 Servicing Information
52
12.1. Indoor Electronic Controllers Removal Procedures
52
• High efficiency.
• Compact design.
• Wider range of horizontal discharge air.
• Air Filter with function to reduce dust and smoke.
• Automatic air swing and manual adjusted by Remote
Control for horizontal and vertical airflow.
• Long installation piping up to 25 meter.
• Supersonic Air Purifying System with SUPER alleru-buster.
− Inactive various harmful airbone elements including
allergens, viruses and bacteria.
− Generated supersonic waves enhance the ability to
collect dust and dirt in the air.
• Quality Improvement
− Random auto restart after power failure for safety restart
operation.
− Gas leakage detection.
− Prevent Compressor reverse cycle.
− Inner protector to protect Compressor.
− Noise prevention during soft dry operation.
− Blue coated Condenser for high resistance to corrosion.
− Anti-dew formation control (Cooling & Soft Dry).
• Operation Improvement
− Quiet mode to provide quiet operation.
− Powerful mode to reach the desired room temperature
quickly.
12.2. Cross Flow Fan and Indoor Fan Motor Removal
Procedures
53
12.3. Remote Control Reset
54
12.4. Auto OFF/ON Button
55
13 Troubleshooting Guide
56
13.1. Refrigeration cycle system
56
14 Technical Data
58
14.1. Thermostat characteristics
58
14.2. Operation characteristics
58
15 Exploded View (Indoor Unit)
60
15.1. CS-C18DKD CS-C24DKD
60
16 Replacemen t Parts List (Indoor Unit)
61
16.1. CS-C18DKD CS-C24DKD
61
17 Exploded View (Outdoor Unit)
62
17.1. CU-C18DKD
62
17.2. CU-C24DKD
63
18 Replacemen t Parts List (Outdoor Unit)
64
18.1. CU-C18DKD CU-C24DKD
64
19 Electronic Circuit Diagram
65
19.1. Indoor Unit & Outdoor Unit
65
19.2. Remote Control
70
19.3. Print Pattern Indoor Unit Printed Circuit Board
71
19.4. Print Pattern Indicator & Receiver Printed Circuit Board
72
− Ionizer control for generating negative ion in discharge
air.
− 24-hour timer setting.
• Serviceability Improvement
− Removable and washable Front Panel.
1 Features
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
2 Functions
2.1. Remote Control
Operation Start/Stop
OFF / ON
Room Temperature Setting
TEMP.
Operation Mode Selection
•
AUTO
Automatic Operation
•
COOL
Cooling Operation
•
DRY
Soft Dry Operation
MODE
Time / Timer Setting
• Hours and minutes setting.
Clock Setting
• Current time setting.
Ionizer Operation Start/Stop
Indoor Fan Speed Selection
FAN SPEED
•
FAN
Low Fan Speed
•
FAN
Medium Fan Speed
•
FAN
High Fan Speed
•
AUTO
Automatic Fan Speed
FAN
Vertical Airflow Direction Control
• 24-hour, OFF / ON Real Timer Setting.
ON-TIMER
OFF-TIMER
Timer Operation Selection
SET
CANCEL
Timer Operation Set / Cancel
• ON Timer and OFF Timer setting and
cancellation.
CLOCK
AIR SWING
• Vertical Automatic Airflow
Direction Control and Manual
Airflow Direction Control
(5 stages of adjustment).
•
Horizontal Automatic Airflow
Direction Control and Manual
Airflow Direction Control
(5 stages of adjustment).
Powerful Operation Start/Stop
POWERFUL
Quiet Operation Start/Stop
QUIET
Cooling, Soft Dry Operation.
• Increase or decrease set temperature
(16°C to 30°C)
Automatic Operation
•
Operation with 2°C higher than
standard temperature.
• Operation with standard temperature.
•
Operation with 2°C lower than
standard temperature.
<
<
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
2.2. Indoor Unit
Random Auto Restart Control
• Unit will be restarted, when resume from
power failure, at previous setting.
Anti-Freezing Control
• To prevent indoor heat exchanger from
freezing.
Ionizer Operation
• Generate and discharge negative ion.
Indoor Fan Speed Control
• Manual control fan speed
(High, Medium and Low).
• Automatic fan speed
• Automatic air swing and manual adjusted
by remote control for vertical and
horizontal airflow.
Airflow Direction Control
Automatic Operation Button
• Press for < 5 second to operate Automatic
operation mode.Use when the remote
control cannot be used.
• Press for > 5 second to operate Cooling
operation mode and compressor force
to on (“beep” sound will be heard). Used
when test running or servicing.
• Within 20 second of Cooling operation,
press continuously for > 5 second to enter
various setting mode. “beep, beep” sound
will be heard. (Used to toggle remote
control signal receiving sound or select
remote control transmission code.)
AUTO
OFF / ON
Operation Indication Lamps (LED)
• POWER (Green) ........ Lights up in operation,
blinks in Automatic
Operation judging.
•
QUIET (Orange) ........ Lights up in Quiet
Operation.
•
TIMER (Orange) ....... Lights up in Timer
Setting.
•
POWERFUL (Orange) .. Lights up in Powerful
Operation.
•
ION
(Green) ........... Lights up in Ionizer
Operation.
•
SUPER
ALLERU-BUSTER (Blue)
...
Lights up in operation.
Operation Mode
•
Cooling, Soft Dry and Automatic Operation.
Timer Operation
•
Delay OFF/ON Timer control.
Powerful Operation
• Reaches the desired room temperature
quickly.
Time Delay Safety Control
•
Restarting is inhibited for approximately
3 minutes.
Quiet Operation
• To provide quiet operation.
7 Minutes Time Save Control
• To reduce the built up humidity inside
the room.
Anti-Dew Formation Control
• Anti-Dew Formation Control for indoor
unit discharge area.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
2.3. Outdoor Unit
• To protect compressor from reverse
rotation when there is an instantaneous
power failure.
60 Secs. Forced Operation Control
• Once the compressor is activated, it
does not stop within the first 60 secs.
However, it stops immediately with
remote control stop signal.
Overload Protector
• Inner protector.
Compressor Reverse Rotation
Protection Control
Outdoor Fan Operation Control
C24DK
• 6-pole induction motor (2 speed).
• For Cooling or Soft Dry operation
Hi-speed ............. When outdoor
temperature reaches to 31°C.
Lo-speed ............. When outdoor
temperature reaches to 29°C.
C18DK
• 6-pole induction motor (1 speed).
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
3 Product Specifications
3.1. CS-C18DKD CU-C18DKD
Unit CS-C18DKD CU-C18DKD
Power Source (Phase, Voltage, Cycle) ,V,Hz Single, 220 - 230, 50
Cooling Capacity kW (BTU/h) 5.30 (18,10 0) - 5.30 (18,100)
Moisture Removal l/h (Pint/h) 2.9 (6.1)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Lo m3/min (cfm) 12.5 (440) - 12.5 (440) —
Me m3/min (cfm) 13.6 (480) - 13.6 (480) —
Hi m3/min (cfm) 14.8 (520) - 14.8 (520) 30.3 (1,070 ) - 30.8 (1,090)
SHi m3/min (cfm) 15.5 (550) - 15.5 (550) —
Noise Level dB (A) High 42 - 42, Low 37 - 37 High 53 - 54
Electrical Data Input Power kW 1.72 - 1.76
Running Current A 8.2 - 8.3
EER W/W (BTU/hW) 3.08 - 3.01 (10.52 - 10.28)
Starting Current A 36.0
Piping Conne ction Port
(Flare piping)
inch
inch
G ; Half Union 1/2”
L ; Half Union 1/4”
G ; 3-way valve 1/2”
L ; 2-way valve 1/4”
Pipe Size
(Flare piping)
inch
inch
G ; (gas side) 1/2”
L ; (liquid side) 1/4”
G ; (gas side) 1/2”
L ; (liquid side) 1/4”
Drain
Hose
Inner diame ter mm 12 —
Length mm 650 —
Power Cord Length m 1.9 —
Number of core-wire 3 (1.5 mm2) —
Dimensions Height inch (mm) 10 - 13/16 (275) 21 - 1/4 (540)
Width inch (mm) 39 - 9/32 (998) 30 - 23/32 (780)
Depth inch (mm) 9 - 1/16 (230) 11 - 3/8 (289)
Net Weight lb (kg) 24 (11.0) 90 (41.0)
Compressor Description — Rotary (1 cylinder)
rolling piston type
Motor Type — Induction (2-poles)
Rated Output kW — 1.5
Air Circulation Description Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Input W 65.1 86.5
Rated Output W 30 36
Fan Speed Low rpm 1,150 - 1,150 —
Medium rpm 1,250 - 1,250 —
High rpm 1,360 - 1,360 830 - 855
SuperHigh rpm 1,420 - 1,420 —
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)
Fin Type Slit Fin Louver Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×24
FPI 21 16
Size (W × H × L) mm 810 × 315 × 25.4 723.5
744.2
× 504.0 × 25.4
Refrigerant Control Device — Capillary Tube
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
Unit CS-C18DKD CU-C18DKD
Refrigeration Oil (cm3) — SUNISO 4GSI
Refrigerant (R-22) g (oz) — 980 (34.6)
Thermostat — —
Protection Device — Inner Protector
Capillary Tube Length mm — 596
Flow Rate l/min — 21.0
Inner Diameter mm — 1.9
Air Filter Material
Style
P.P.
Honeycomb
—
Capacity Control Capillary Tube
Compressor Capacitor µF, VAC — 40 µF, 400VAC
Fan Motor Capacitor µF, VAC — 2.0 µF, 440VAC
Note:
• Specifications are subject to change without notice for further improvement.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
3.2. CS-C24DKD CU-C24DKD
Unit CS-C24DKD CU-C24DKD
Power Source (Phase, Voltage, Cycle) ,V,Hz Single, 220 - 230, 50
Cooling Capacity kW (BTU/h) 7.03 (24,00 0) - 7.03 (24,000)
Moisture Removal l/h (Pint/h) 4.0 (8.5)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Lo m3/min (cfm) 13.9 (492) - 13.9 (492)
←
Me m3/min (cfm) 15.4 (544) - 15.4 (544) —
Hi m3/min (cfm) 16.9 (597) - 16.9 (597)
←
SHi m3/min (cfm) 17.5 (617) - 17.5 (617) —
Noise Level dB (A) High 46 - 46, Low 40 - 40 High 53 - 54
Electrical Data Input Power kW 2..35 - 2.41
Running Current A 11.5 - 11.6
EER W/W (BTU/hW) 2.99 - 2.92 (10.21 - 9.96)
Starting Current A 65.0
Piping Conne ction Port
(Flare piping)
inch
inch
G ; Half Union 5/8”
L ; Half Union 1/4”
G ; 3-way valve 5/8”
L ; 2-way valve 1/4”
Pipe Size
(Flare piping)
inch
inch
G ; (gas side) 5/8”
L ; (liquid side) 1/4”
G ; (gas side) 5/8”
L ; (liquid side) 1/4”
Drain
Hose
Inner diame ter mm 12 —
Length mm 650 —
Power Cord Length m 1.9 —
Number of core-wire 3 (2.5 mm2) —
Dimensions Height inch (mm) 10 - 13/16 (275) 29 - 17/32 (750)
Width inch (mm) 39 - 9/32 (998) 34 - 7/16 (875)
Depth inch (mm) 9 - 1/16 (230) 13 - 19/32 (345)
Net Weight lb (kg) 24 (11.0) 128 (58.0)
Compressor Description — Rotary (1 cylinder) rolling piston
type
Motor Type — Induction (2-poles)
Rated Output kW — 2.2
Air Circulation Description Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Input W 47.3 133.5
Rated Output W 30 66
Fan Speed Low rpm 1,250 - 1,250 420 - 450
Medium rpm 1,390 - 1,390 —
High rpm 1,530 - 1,530 770 - 785
SuperHigh rpm 1,590 - 1,590 —
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue Coat)
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×34
FPI 21 18
Size (W × H × L) mm 810 × 315 × 25.4 850.5
870.5
× 714 × 25.4
Refrigerant Control Device — Capillary Tube
Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS
M60 or ATMOS 56M
Refrigerant (R-22) g (oz) — 1,440 (50.8)
Thermostat — Mechanical Control
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
Unit CS-C24DKD CU-C24DKD
Protection Device — Inner Protector
Capillary Tube Length mm — 754
Flow Rate l/min — 22.0
Inner Diameter mm — 2.0
Air Filter Material
Style
P.P.
Honeycomb
—
Capacity Control Capillary Tube
Compressor Capacitor µF, VAC — 45 µF, 400/440VAC
Fan Motor Capacitor µF, VAC — 3.5 µF, 440VAC
Note:
• Specifications are subject to change without notice for further improvement.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
4 Dimensions
4.1. Indoor Unit & Remote Control
4.1.1. CS-C18DKD CS-C24DKD
10
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
4.2. Outdoor Unit
4.2.1. CU-C18DKD
11
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
4.2.2. CU-C24DKD
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
5 Refrigeration Cycle Diagram
13
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
6 Block Diagram
14
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
7 Wiring Diagram
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
15
CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
16
8 Operation Details
8.1. Cooling Operation
• Cooling operation can be set using remote control.
• This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control.
• The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C
to 30°C.
• During cooling operation, the compressor will stop running and restart as shown in below figure.
8.1.1. Cooling Operation Time Diagram
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
8.2.1. Soft Dry Operation Time Diagram
8.2. Soft Dry Operation
• Soft Dry operation can be set using remote control.
• Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.
• This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
• When operation begins, Soft Dry will be switched “ON” for a maximum 10 minutes, then Soft Dry operation will be turned “OFF”
for a minimum 6 minutes. After that, the Soft Dry operation will be “ON” and “OFF” based on the setting temperature as shown
in below figure.
• However after 3 minutes of compressor off, during Soft Dry “OFF” (within 6 minutes Soft Dry restart control), the indoor unit will
start to operate at normal Cooling mode if the intake temperature is higher than Cooling “ON” point.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
8.3. Automatic Operation
• Automatic operation can be set using remote control.
• This operation starts to operate with indoor fan at SLo speed for 20 seconds to judge the intake air temperature.
• After judged the temperature, the operation mode is determined by refering to the below standard.
• Then, the unit start to operate at determined operation mode, until it is switched off using remote control, with the setting
temperature as shown in below table.
• The setting temperature for all the operations can be changed one level up or one level down from the standard temperature
as shown in below table by pressing on the temperature up or temperature down button at remote control.
• The operation mode judging temperature and standard setting temperature can be increased by 2°C permanently, by open the
circuit of JX1 at indoor electronic controller.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
8.4. Operation Control
(For 8.4.1. to 8.4.7. information applies only to Cooling and Soft Dry Operation)
8.4.1. Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
− Cooling operation - the compressor stops for 3 minutes (minimum) before resume operation.
− Soft Dry operation - the compressor stops for 6 minutes (minimum) before resume operation.
• If the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the moment operation
stop, although the unit is turn on again within the period.
• This phenomenon is to balance the pressure inside the refrigerant cycle.
8.4.2. 7 Minutes Time Save Control
• The compressor will start automatically if it has stopped for 7 minutes and the intake air temperature falls between the
compressor ON temperature (A) and compressor OFF temperature (B) during the period.
• This phenomenon is to reduce the built up humidity inside a room.
8.4.3. 60 Seconds Forced Operation
• Once the air conditioner is turned on, the compressor will not stop within 60 seconds in a normal operation although the intake
air temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON operation button at the
remote control is permitted.
• The reason for the compressor to force operate at minimum 60 seconds is to allow the refrigerant oil run in a full cycle and
return back to the outdoor unit.
8.4.4. Anti-Freezing Control
• If the temperature of the indoor heat exchanger falls below 2°C continuously for 4 minutes or more, the compressor turns off.
The fan speed setting remains the same.
• This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form
returning to the compressor.
• Compressor will restart again when the indoor heat exchanger temperature rises to 10°C (Recovery).
• Restart control (Time Delay Safety Control) will be applied in this Control if the recovery time is too short.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
8.4.5. Compressor Reverse Rotation Protection Control
• If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and
indoor heat exchanger is 2.5°C or less for continuous 2 minutes, compressor will stop and restart automatically.
• Time Delay Safety Control is activated before the compressor restart.
T = Intake air temperature - Indoor heat exchanger temperature
• This is to prevent compressor from rotate reversely when there is an instantaneous power failure.
8.4.6. Starting Current Control
• When the compressor, outdoor fan motor and indoor fan motor are simultaneously started, the indoor fan motor will start to
operate at 1.6 second later.
• The reason of the difference is to reduce the starting current flow.
8.4.7. Anti-Dew Formation Control
• Purpose is to prevent dew formation on indoor unit air discharge area.
• When room temperature is constant (±1°C) the following conditions occur for 30 minutes continuously, anti-dew formation will
activate:
− Remote Control setting temperature is less than 25°C.
− Compressor is on.
− Cooling operation mode.
− Indoor Fan motor operate at Low fan speed or QLo.
• This control is cancelled immediately when above condition is changed.
• Anti-Dew formation is control by:
1. Increasing Air Flow Volume
a. Lo fan speed
Lo fan speed is changed to Lo+ after 30 min to prevent dew formation.
b. QLo fan speed
Dew formation may occurs at QLo cool, therefore QLo cool is operated only 1 hr 30 min (1 hr QLo, 30 min QLo +100
rpm). After that, it operates at QLo +180rpm (However Quiet LED remains on).
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
2. Norrowing
Vertical Airflow Direction
− During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 10° - 38° to 10° - 27° under
Cooling and Soft Dry operation mode.
− During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 10°, 14°, 18°, 22°, 27° to
10°, 13°, 16°, 19°, 22° under Cooling and Soft Dry operation mode.
3. Narrowing
Horizontal Airflow Direction
− During Anti-dew condensation prevention, Airflow Direction Auto-control angle change form o° - 44° to 14° - 30° under
Cooling and Soft Dry operation mode.
− During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 0°, 11°, 22°, 33°, 44° to
14°, 18°, 22°, 26°, 30° under Cooling and Soft Dry operation mode.
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CS-C18DKD CU-C18 DKD / CS-C24DKD CU-C24DKD
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