Panasonic CS-A18DKD User 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-A18DKD CU-A18DKD 6
3.2. CS-A24DKD CU-A24DKD 8
4 Dimensions 10
4.1. Indoor Unit & Remote Control 10
4.2. Outdoor Unit 11
5 Refrigeration Cycle Diagram 12
6 Block Diagram 13
7 Wiring Diagram 14
8 Operation Details 15
© 2004 Panasonic HA Air-Conditioning (M) Sdn Bhd
(11969-T). All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-A18DKD CU-A18DKD
CS-A24DKD CU-A24DKD
8.1. Heating Operation 15
8.2. Cooling Operation 16
8.3. Soft Dry Operation 17
8.4. Automatic Operation 18
8.5. Operation Control 19
8.6. Indoor Fan Speed Control 26
8.7. Outdoor Fan Speed Control 28
8.8. Vertical Airflow Direction Control 28
8.9. Horizontal Airflow Direction Control 29
8.10. Powerful Operation 30
8.11. Quiet Operation 30
8.12. Ionizer Operation 32
8.13. Timer Control 33
8.14. Random Auto Restart Control 34
8.15. Remote Control Signal Receiving Sound 34
Air Conditioner
CONTENTS
Page Page
Order No. MAC0501007C3

9 Operating Instructions 35
10 Installation Instructions 41
10.1. Safety Precautions 41
10.2. Indoor Unit 44
10.3. Outdoor Unit 48
11 2-way, 3-way Valve 51
11.1. Evacuation of the Equipment (For Europe & Oceania
Destination) 52
11.2. Air Purging of the Piping and Indoor Unit 58
12 Servicing Information 64
12.1. Indoor Electronic Controllers Removal Procedures 64
12.2. Cross Flow Fan and Indoor Fan Motor Removal
Procedures 65
12.3. Remote Control Reset 66
12.4. Auto OFF/ON Button 67
13 Troubleshooting Guide 68
13.1. Refrigeration cycle system 68
• 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).
− Overload Protection Control (Heating).
− Outdoor Fan Control.
− Compressor High Pressure Control.
• Operation Improvement
− Quiet mode to provide quiet operation.
− Powerful mode to reach the desired room temperature
quickly.
− Ionizer control for generating negative ion in discharge
air.
− 24-hour timer setting.
14 Technical Data 70
14.1. Thermostat characteristics 70
14.2. Operation characteristics 71
15 Exploded View (Indoor Unit) 73
15.1. CS-A18DKD CS-A24DKD 73
16 Replacement Parts List (Indoor Unit) 74
16.1. CS-A18DKD CS-A24DKD 74
17 Exploded View (Outdoor Unit) 75
17.1. CU-A18DKD CU-A24DKD 75
18 Replacement Parts List (Outdoor Unit) 76
18.1. CU-A18DKD CU-A24DKD 76
19 Electronic Circuit Diagram 77
19.1. Indoor Unit & Outdoor Unit 77
19.2. Remote Control 83
19.3. Print Pattern Indoor Unit Printed Circuit Board 84
19.4. Print Pattern Indicator & Receiver Printed Circuit Board 85
19.5. Print PatternOutdoor Unit Printed Circuit Board 86
• Serviceability Improvement
− Removable and washable Front Panel.
1 Features
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

2 Functions
2.1. Remote Control
Operation Start/Stop
OFF / ON
Room Temperature Setting
TEMP.
Operation Mode Selection
• AUTO Automatic Operation
•
COOL Cooling Operation
•
HEAT Heating Operation Mode
•
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
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-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

2.2. Indoor Unit
Ionizer Operation
• Generate and discharge negative ion.
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.
Indoor Fan Speed Control
• Manual control fan speed
(High, Medium and Low).
• Automatic fan speed
•
•
Vertical airflow control can be adjusted
automatically or manually by remote control.
Horizontal airflow control can be adjusted
automatically or manually by remote control.
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
• Heating, Cooling, Soft Dry and Automatic
Operation.
Powerful Operation
• Reaches the desired room temperature
quickly.
Timer Operation
• Delay OFF/ON Timer control.
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.
Hot-Start Control
• To prevent cold air being discharge during
Heating operation starts.
Anti Cold Draft Control
• To prevent the cold draft during Heating
mode operation in thermo off condition.
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

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
• To prevent frosting at outdoor heat
exchanger during Heating Operation.
Deice Control
• When the unit is switched to “OFF”
during Heating Operation, 4-way valve
stays at Heating position for 5 minutes.
4-Way Valve Control
Outdoor Fan Operation Control
• 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.
For Heating operation
Hi-speed ............. When outdoor
temperature reaches to 13.5°C.
Lo-speed ............. When outdoor
temperature reaches to 15.5°C.
For Over-heating Protection, the Fan is
switched ON or OFF depending on the
piping temperature and the outdoor
temperature.
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

3 Product Specifications
3.1. CS-A18DKD CU-A18DKD
Unit CS-A18DKD CU-A18DKD
Power Source (Phase, Voltage, Cycle) ,V,Hz Single, 220 - 230, 50
Cooling Capacity kW (BTU/h) 5.30 (18,100) - 5.30 (18,100)
Heating Capacity kW (BTU/h) 5.65 (19,300) - 5.70 (19,400)
Moisture Removal l/h (Pint/h) 2.9 (6.1)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Lo m3/min (cfm) Cooling; 13.1 (460) - 13.1 (460) 28.6 (1,010) - 31.1 (1,100)
Heating; 14.2 (500) - 14.2 (500)
Me m3/min (cfm) Cooling; 14.5 (510) - 14.5 (510) —
Heating; 14.7 (520) - 14.7 (520)
Hi m3/min (cfm) Cooling; 15.3 (540) - 15.3 (540) 50.7 (1,790) - 52.7 (1,860)
Heating; 16.0 (560) - 16.0 (560)
SHi m3/min (cfm) Cooling; 16.0 (560) - 16.0 (560) —
Noise Level dB (A) Cooling; High 43 - 43, Low 38 -38 Cooling; High 53 - 54
Heating; High 42 - 42, Low 38 -38 Heating; High 54 - 55
Electrical Data Input Power kW Cooling; 1.72 - 1.76
Heating; 1.65 - 1.71
Running Current ACooling; 8.0 - 7.8
Heating; 7.7 - 7.6
EER W/W (BTU/hW) Cooling; 3.08 - 3.01 (10.52 - 10.28)
COP W/W (BTU/hW) Heating; 3.42 - 3.33 (11.70 - 11.35)
Starting Current A 44.5
Piping Connection Port
(Flare piping)
inch
inch
G ; Half Union 1/2”
L ; Half Union 1/4”
G ; 3-way valve 1/2”
L ; 3-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 diameter 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) 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) 132 (60.0)
Compressor Description —Rotary (1 cylinder)
rolling piston type
Motor Type —Induction (2-poles)
Rated Output kW — 1.5
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Unit CS-A18DKD CU-A18DKD
Air Circulation Description Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Input W 50.0 - 50.0 150.3 - 150.3
Rated Output W 30 80
Fan Speed Low rpm Cooling; 1,160 - 1,160 460 - 490
Heating; 1,240 - 1,240
Medium rpm Cooling; 1,290 - 1,290 —
Heating; 1,290 - 1,290
High rpm Cooling; 1,360 - 1,360 815 - 830
Heating; 1,400 - 1,400
SuperHigh rpm Cooling; 1,400 - 1,400 —
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×28
FPI 21 16
Size (W × H × L) mm 810 × 315 × 25.4 827.7
862.2
× 711.2 × 44
Refrigerant Control Device —Capillary Tube
Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS
M60 or ATMOS 56M
Refrigerant (R-22) g (oz) — 1,710 (60.4)
Thermostat — —
Protection Device — Inner Protector
Capillary Tube Length mm — Cooling; 970, Heating; 820
Flow Rate l/min — Cooling; 11.0, Heating; 27.0
Inner Diameter mm — Cooling; 1.6, Heating; 2.2
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-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

3.2. CS-A24DKD CU-A24DKD
Unit CS-A24DKD CU-A24DKD
Power Source (Phase, Voltage, Cycle) ,V,Hz Single, 220 - 230, 50
Cooling Capacity kW (BTU/h) 7.03 - 7.03 (24,000 - 24,000)
Heating Capacity kW (BTU/h) 7.80 - 7.80 (26,600 - 26,600)
Moisture Removal l/h (Pint/h) 4.0 (8.5)
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Lo m3/min (cfm) Cooling; 13.7 (480) - 13.7 (480) 28.1 (990) - 29.9 (1,055)
Heating; 14.7 (520) - 14.7 (520)
Me m3/min (cfm) Cooling; 15.8 (560) - 15.8 (560) —
Heating; 15.8 (560) - 15.8 (560)
Hi m3/min (cfm) Cooling; 16.8 (590) - 16.8 (590) 49.7 (1,750) - 50.7 (1,790)
Heating; 17.6 (620) - 17.6 (620)
SHi m3/min (cfm) Cooling; 17.6 (620) - 17.6 (620) —
Noise Level dB (A) Cooling; High 47 - 47, Low 41 - 41 Cooling; High 53 - 54
Heating; High 46 - 46, Low 41 - 41 Heating; High 54 - 55
Electrical Data Input Power kW Cooling; 2.54 - 2.58
Heating; 2.53 - 2.56
Running Current ACooling; 12.3 - 12.2
Heating; 12.2 - 12.1
EER W/W (BTU/hW) Cooling; 2.77 - 2.72 (9.45 - 9.30)
COP W/W (BTU/hW) Heating; 3.08 - 3.05 (10.51 - 10.39)
Starting Current A 65.0
Piping Connection Port
(Flare piping)
inch
inch
G ; Half Union 5/8”
L ; Half Union 1/4”
G ; 3-way valve 5/8”
L ; 3-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 diameter 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) 26 (12.0) 139 (63.0)
Compressor Description —Rotary (1 cylinder) rolling
piston type
Motor Type —Induction (2-poles)
Rated Output kW — 2.0
Air Circulation Description Cross-flow Fan Propeller Fan
Material ASHT-18 PP
Motor Type Transistor (8-poles) Induction (6-poles)
Rated Output W 30 80
Fan Speed Low rpm Cooling; 1,280 - 1,280 460 - 490
Heating; 1,380 - 1,380
Medium rpm Cooling; 1,480 - 1,480 —
Heating; 1,480 - 1,480
High rpm Cooling; 1,570 - 1,570 815 - 830
Heating; 1,650 - 1,650
SuperHigh rpm Cooling; 1,650 - 1,650 —
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

Unit CS-A24DKD CU-A24DKD
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2×15 2×28
FPI 21 18
Size (W × H × L) mm 810 × 315 × 25.4 827.7
862.2
× 711.2 × 44.0
Refrigerant Control Device —Capillary Tube
Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS
M60 or ATMOS 56M
Refrigerant (R-22) g (oz) — 2,050 (72.4)
Thermostat — —
Protection Device — Inner Protector
Capillary Tube Length mm — Cooling; 730, Heating; 340
Flow Rate l/min — Cooling; 12.5, Heating; 21.0
Inner Diameter mm — Cooling; 1.6, Heating; 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-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

4 Dimensions
4.1. Indoor Unit & Remote Control
4.1.1. CS-A18DKD CS-A24DKD
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

4.2. Outdoor Unit
4.2.1. CU-A18DKD CU-A24DKD
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

5 Refrigeration Cycle Diagram
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

6 Block Diagram
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7 Wiring Diagram
CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD
14

8 Operation Details
8.1. Heating Operation
• Heating operation can be set using remote control.
• This operation is applied to warm 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 Heating operation, the compressor will stop running and restart as shown in below figure.
8.1.1. Heating Operation Time Diagram
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

8.2. 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.
8.2.1. Cooling Operation Time Diagram
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

8.3. 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.
8.3.1. Soft Dry Operation Time Diagram
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

8.4. Automatic Operation
• Automatic operation can be set using remote control.
• This operation starts to operate with indoor fan at SLo speed for 25 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.
• Operation mode will be determine again for judgement after 1 hour of operation, if the room temperature reaches to set
temperature and compressor off time is over 7 minutes 30 seconds continuously.
The present mode will be continued, if the room temperature does not reach to set temperature (Compressor keeps running) eventhrough after
1 hour from automatic operation mode started.
Present Judgement Next Mode
Mode Cooling Soft Dry Heating
O O
Cooling 23°C Cooling (Judgement: Not Applicable (Judgement:
Heating 23°C & Above) Below 23°C)
O O
Soft Dry 20°C Soft Dry Not Applicable (Judgement: (Judgement:
Heating 20°C & Above) Below 20°C)
O O
Heating Cooling (Judgement: Not Applicable (Judgement:
25°C Heating 25°C & Above) Below 25°C)
• Automatic Set Temperature
For each operation, set temperature will automaticlly set as shown below.
• 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.
Operation Hi (Standard) Lo
(+2°C) (±0°C) (-2°C)
Cooling 27°C 25°C 23°C
Soft Dry 24°C 22°C 20°C
Heating 23°C 21°C 19°C
• 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-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

8.5. Operation Control
8.5.1. Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
− Cooling/Heating 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.
8.5.2. 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 (cooling mode)/5°C (heating mode) 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.
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CS-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD

(For 8.5.3. to 8.5.7. information applies only to Cooling and Soft Dry Operation)
8.5.3. 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.
8.5.4. 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.
8.5.5. 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.
8.5.6. 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-A18DKD CU-A18DKD / CS-A24DKD CU-A24DKD