Panasonic CS-A18BKP Service Manual

Order No. MAC0111062C0

Room Air Conditioner

CS-A18BKP CU-A18BKP5 CS-A24BKP CU-A24BKP5

CONTENTS

Page Page

1 Features 2 2 Functions 3 Product Specifications 4 Dimensions 5 Refrigeration Cycle Diagram 6 Block Diagram 7 Wiring Diagram 8 Operation Details 9 Operating Instructions 10 Installation Instructions

11 3-way Valve 48

12 Servicing Information

13 Troubleshooting Guide 14 Technical Data

12 14

15 Exploded View

16 Replaceme nt Parts List 17 Exploded View

16 17

18 Replaceme nt Parts List

19 Electronic Circuit Diagram

61 65 67 71 72 73 74 75

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

1 Features

High Efficiency

•

Compact Design

•

Comfort Environment

•

8 hours of sleep mode operation

−

Air filter with function to reduce dust and smoke

−

Wider range of horizontal discharge air

−

New Automatic air swing and manual adjusted by

−

remote control for horizontal airflow.

Auto Restart

•

Random auto restart after power failure for safety restart

−

operation

Removable and Washable Front Panel

•

Remote Control Self-illuminating Button

•

Catechin Air Purifying Filter

•

Trap dust, tobacco smoke and tiny particles

−

Prevent the growth of bacteria and viruses trapped

−

Solar Refreshing Deodorizing Filter

•

Remove unpleasant odour from the air

−

Quality Improvement

•

Gas leakage protection

−

Prevent compressor reverse cycle

−

Inner protector

−

Noise prevention during soft dry operation.

−

Anti-dew Formation Control (Cooling & Soft Dry)

−

Overload Protection Control (Heating)

−

Outdoor Fan Control

−

Compressor High Pressure Control

−

Blue Coated Condenser

−

High resistance to corrosion.

−

Operation Improvement

•

Economy mode to reduce electrical power consumption

−

Powerful mode to reach the desired room temperature

−

quickly

Long Installation Piping

•

Long piping up to 25 meter

−

24-hour Timer Setting

•

2 Functions

Remote Control

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Self illuminating

button

OFF / ON I

MODE

FAN SPEED

AIR SWING

Operation OFF / ON

Operation Mode Selection

•

AUTO HEAT COOL DRY

Automatic Operation Mode Heating Operation Mode Cooling Operation Mode Soft Dry Operation Mode

Indoor Fan Speed Selection

•

FAN

Low Fan Speed

•

FAN

Medium Fan Speed

•

FAN

High Fan Speed

•

AUTO FAN

Automatic Fan Speed

Vertical Airflow Direction Control

• 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).

TEMP.

ON-TIMER OFF-TIMER

TIME

SET CANCEL

CLOCK

Room Temperature Setting

Heating, Cooling, Soft Dry Operation.

• Temperature Setting (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.

Timer Operation Selection

• 24-hour, OFF / ON Real Timer Setting.

Time / Timer Setting

• Hours and minutes setting.

Timer Operation Set / Cancel

• ON Timer and OFF Timer setting and

cancellation.

Clock Setting

POWERFUL

ECONOMY

Powerful Mode Operation OFF/ON

Economy Mode Operation OFF/ON

SLEEP

• Current time setting.

Sleep Mode Operation OFF / ON

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Indoor Unit

AUTO

OFF / ON

Automatic Operation Button

• Press for < 5s to operate Automatic operation mode. (Used when the remote control cannot be used.)

• Press continuously for 5s or < 10s to operate Test Run/Pump down. “Beep” sound will be heard at the 5th second. (Used when test running or servicing.)

• Press continuously for 10s and above to omit or resume the remote control signal receiving sound. “Beep, beep” sound will be heard at the 10th second.

Operation Indication Lamps (LED)

•

POWER

(Green)..........Lights up in operation,

•

SLEEP

(Orange) .........Lights up in Sleep Mode

•

TIMER

(Orange).........

•

POWERFUL

•

ECONOMY

(Orange)...Lights up in Powerful

(Green) ...... Lights up in Economy

Operation Mode

• Heating, Cooling, Soft Dry and Automatic Mode.

blinks in Automatic Operation Mode judging and Hot Start operation.

Operation. Lights up in Timer Setting.

Mode Operation. Mode Operation.

Sleep Mode Auto Control

• Indoor Fan operates refer to Indoor Fan Speed control.

• Operation stops after 8 hours.

Indoor Fan Speed Control

• High, Medium and Low.

• Automatic Fan Speed Mode – Heating : Fan speed varies from Me

→ SSLo in accordance with indoor heat exchanger.

– Cooling : Fan rotates at Hi, Me and

SLo speed. Deodorizing control is available.

– Soft Dry : Fan rotates at SLo speed.

Deodorizing control is available.

Airflow Direction Control

• Automatic air swing and manual adjusted by remote control for vertical and horizontal airflow.

Time Delay Safety Control

• Restarting is inhibited for appro. 3 minutes.

7 Minutes Time Save Control

• Cooling Operation only.

Powerful Operation

•

Reaches the desired room temperature quickly.

Economy Operation

• To reduce electrical power consumption.

Random Auto Restart Control

• Operation is restarted randomly after power failure at previous setting mode.

Anti-Freezing Control

• Anti-Freezing control for indoor heat exchanger. (Cooling and Soft Dry)

Anti-Dew Formation Control

• Anti-Dew Formation Control for indoor unit discharge area.

Hot-Start Control

• At Heating Operation the indoor fan will operate at SLo speed when indoor heat exchanger temperature reaches 30°C.

Anti Cold Draft Control

• The indoor fan operates at Lo– (30 sec.) after that SSLo when the indoor heat exchanger temperature is low. (During Heating mode thermal off)

Outdoor Unit

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Compressor Reverse Rotation Protection Control

• To protect compressor from reverse rotation when there is a instantaneous power failure.

Overload Protector

• Inner protector.

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.

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.

Deice Control

• To prevent frosting at outdoor heat exchanger during Heating Operation.

4-Way Valve Control

• When the unit is switched to “OFF” during Heating Operation, 4-way valve stays at Heating position for 5 minutes.

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

3 Product Specifications

Unit CS-A18BK CU-A18BK

Power Source Phase, Voltage, Cycle (1)

(4) (2) Single, 240 - 230, 50 Hz (3) Single, 220, 50 Hz

Cooling Capacity kW (BTU/h) (1)

(2) (4)

(3) 5.30 (18,100)

Heating Capacity kW (BTU/h) (1)

(4) (2) 5.75 - 5.70 (19,600 - 19,400) (3) 5.65 (19,300)

Moisture Removal l/h (Pint/h) 2.9 (6.1)

Single, 230 - 220, 50 Hz

5.30 - 5.30 (18,100 - 18,100)

5.70 - 5.65 (19,400 - 19,300)

Airflow Method OUTLET

INTAKE

Air Volume Indoor Air (Lo) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 13.1 (460)

Indoor Air (Me) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 14.6 (520)

Indoor Air (Hi) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 15.4 (540)

Indoor Air (SHi) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 15.9 (560)

Noise Level dB (A) (1)

(4) (2) Cooling; High 43 - 43, Low 38 - 3 8

(3) Cooling; High 43, Low 38

Power level dB (1) Cooling; 54 - 54

(2) Cooling; 55 - 55

(3) (4)

SIDE VIEW TOP VIEW

Cooling; 13.1 (460) - 13.1 (460) Heating; 14.1 (500) - 14.1 (500)

Heating; 14.1 (500)

Cooling; 14.6 (520) - 14.6 (520) Heating; 14.7 (520) - 14.7 (520) —

Heating; 14.7 (520)

Cooling; 15.4 (540) - 15.4 (540) Heating; 15.9 (560) - 15.9 (560)

Heating; 15.9 (560)

Cooling; 15.9 (560) - 15.9 (560) Heating; 15.9 (560) - 15.9 (560)

Heating; 15.9 (560)

Cooling; High 43 - 43, Low 38 - 38 Heating; High 42 - 42, Low 38 - 38

Heating; High 42 - 42, Low 38 - 38

Heating; High 42, Low 38

Heating; 53 - 53

Heating; 54 - 54

— —

Cooling; High 55 - 54 Heating; High 56 - 55

Cooling; High 56 - 55 Heating; High 57 - 56

Cooling; High 54 Heating; High 55

Cooling; 68 - 67 Heating; 69 - 68

Cooling; 70 - 69 Heating; 72 - 71

—

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Unit CS-A18BK CU-A18BK

Electrical Data Input Power kW (1)

(4)

Cooling; 1.76 - 1.72

Heating; 1.71 - 1.65

(2) Cooling; 1.81 - 1.76

Heating; 1.80 - 1.75

(3) Cooling; 1.72

Heating; 1.65

Running Current A (1)

(4)

Cooling; 7.8 - 8.0 Heating; 7.6 - 7.7

(3) Cooling; 8.0

Heating; 7.7

EER W/W (BTU/hW) (1)

Cooling; 3.01 - 3.08 (10.28 - 10.52)

(4) (2) Cooling; 2.93 - 3.01 (10.00 - 10.28) (3) Cooling; 3.08 (10.52)

COP W/W (BTU/hW) (1)

Heating; 3.33 - 3.42 (11.35 - 11.70)

(4) (2) Heating; 3.19 - 3.26 (10.89 - 11.09) (3) Heating; 3.42 (11.70)

Starting Current A (1)

38.0

(4) (3) 36.0

Piping Connection Port (Flare piping)

Pipe Size (Flare piping)

Drain Hose

Inner diameter mm 12 — Length mm 650 —

inch inch

G ; Half Union 1/2”

L ; Half Union 1/4” G ; (gas side) 1/2”

L ; (liquid side) 1/4”

G ; 3-way valve 1/2”

L ; 3-way valve 1/4”

G ; (gas side) 1/2”

L ; (liquid side) 1/4”

Power Cord Length m 1.9 —

Number of core-wire 3 (1.5 mm2) —

Dimensions Height inch (mm) 10 - 13/16 (275) 26 - 31/32 (685)

Width inch (mm) 39 - 9/32 (998) 31 - 1/2 (800)

Depth inch (mm) 8 - 9/32 (210) 11 - 13/16 (300) Net Weight lb (kg) 24 (11.0) 132 (60.0) Compressor Type — Rotary (1 cylinder)

rolling piston type Motor Type — Induction (2-poles) Rated Output kW — 1.5

Air Circulation Type Cross-flow Fan Propeller Fan

Material ASHT-18 PC + AES + Glass Fiber 15%

Motor Type Transistor (8-poles) Induction (6-poles)

Input W 44.8 - 53.5 151.2 - 135.7 Rated Output W 30 72 Fan Speed Low rpm (1)

(2)

Cooling; 1,160 - 1,160 Heating; 1,240 - 1,240

635 - 600

(4) (3) Cooling; 1,160

600

Heating; 1,240

Medium rpm (1)

(2)

Cooling; 1,290 - 1,290 Heating; 1,290 - 1,290

—

(4) (3) Cooling; 1,290

—

Heating; 1,290

High rpm (1)

(2)

Cooling; 1,360 - 1,360 Heating; 1,400 - 1,400

990 - 950

(4) (3) Cooling; 1,360

950

Heating; 1,400

SuperHigh rpm (1)

(2)

Cooling; 1,400 - 1,400 Heating; 1,400 - 1,400

—

(4) (3) Cooling; 1,400

—

Heating; 1,400

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 2×26 FPI 21 16 Size (W × H × L) mm 810 × 315 × 25.4 769.2

× 660.4 × 44

732.9

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Unit CS-A18BK CU-A18BK

Refrigerant Control Device — Capillary Tube Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS

Refrigerant (R-22) g (oz) — 1,640 (57.9) Thermostat Electronic Control Mechanical Control Protection Device — Inner Protector Capillary Tube Length mm — Cooling; 816, Heating; 365

Flow Rate l/min — Cooling; 10.6, Heating; 26.5 Inner Diameter mm — Cooling; 1.5, Heating; 2.2

Air Filter Material

Style Capacity Control Capillary Tube Compressor Capacitor µF, VAC — 45 µF, 370VAC Fan Motor Capacitor µF, VAC — 3.0 µF, 450VAC

P.P.

Honeycomb

M60 (700)

—

Note:

•

Specifications are subject to change without notice for further improvement.

•

(1) — CS-A18BKP/CU-A18BKP5 (Europe).

•

(2) — CS-A18BKP-2/CU-A18BKP5-2 (Oceania).

•

(3) — CS-A18BKP-3/CU-A18BKP5-3 (Argentina).

•

(4) — CS-A18BKP-6/CU-A18BKP5-6 (Turkey).

Unit CS-A24BK CU-A24BK

Power Source Phase, Voltage, Cycle (1)

(4)

(2) Single, 240 - 230, 50 Hz

(3) Single, 220, 50 Hz

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Single, 230 - 220, 50 Hz

Cooling Capacity kW (BTU/h) (1)

(4)

(2) 6.67 - 6.67 (22,700 - 22,700)

(3) 6.84 (23,300)

Heating Capacity kW (BTU/h) (1)

(4)

(2) 7.80 - 7.77 (26,600 - 26,500)

(3) 7.85 (26,800)

Moisture Removal l/h (Pint/h) (1)

(3) (4)

(2) 3.8 (8.0)

Airflow Method OUTLET

INTAKE

6.67 - 6.84 (22,700 - 23,300)

7.72 - 7.85 (26,300 - 26,800)

3.9 (8.2)

SIDE VIEW TOP VIEW

Air Volume Indoor Air (Lo) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 14.4 (510)

Indoor Air (Me) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 16.4 (580)

Indoor Air (Hi) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 17.5 (620)

Indoor Air (SHi) m3/min (cfm) (1)

(2) (4)

(3) Cooling; 18.1 (640)

Noise Level dB (A) (1)

(4) (2) Cooling; High 47 - 47, Low 41 - 4 1

(3) Cooling; High 47, Low 41

Power level dB (1) Cooling; 58 - 58

(2) Cooling; 59 - 59

(3) (4)

Cooling; 14.4 (510) - 14.4 (510) Heating; 15.6 (550) - 15.6 (550)

Heating; 15.6 (550)

Cooling; 16.4 (580) - 16.4 (580) Heating; 16.4 (580) - 16.4 (580)

Heating; 16.4 (580)

Cooling; 17.5 (620) - 17.5 (620) Heating; 18.1 (640) - 18.1 (640)

Heating; 18.1 (640)

Cooling; 18.1 (640) - 18.1 (640) Heating; 18.1 (640) - 18.1 (640)

Heating; 18.1 (640)

Cooling; High 47 - 47, Low 41 - 41 Heating; High 46 - 46, Low 41 - 41

Heating; High 46 - 46, Low 41 - 41

Heating; High 46, Low 41

Heating; 57 - 57

Heating; 59 - 59

— —

—

— —

—

Cooling; High 60 - 59

Heating; High 61 - 60 Cooling; High 61 - 60

Heating; High 62 - 61

Cooling; High 59

Heating; High 60

Coolling; 73 - 72

Heating; 74 - 73

Coolling; 75 - 74

Heating; 78 - 77

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Unit CS-A24BK CU-A24BK

Electrical Data Input Power kW (1)

(4)

Cooling; 2.80 - 2.60 Heating; 2.76 - 2.64

(2) Cooling; 2.87 - 2.80

Heating; 2.86 - 2.81

(3) Cooling; 2.60

Heating; 2.64

Running Current A (1)

(4)

Cooling; 13.2 - 12.6 Heating; 13.0 - 12.9

(3) Cooling; 12.6

Heating; 12.9

EER W/W (BTU/hW) (1)

Cooling; 2.38 - 2.63 (8.11 - 8.96)

(4) (2) Cooling; 2.32 - 2.38 (7.91 - 8.11) (3) Cooling; 2.63 (8.96)

COP W/W (BTU/hW) (1)

Heating; 2.80 - 2.97 (9.53 - 10.15)

(4) (2) Heating; 2.73 - 2.77 (9.30 - 9.43) (3) Heating; 2.97 (10.15)

Starting Current A (1)

66.0

(4) (3) 64.0

Piping Connection Port (Flare piping)

Pipe Size (Flare piping)

Drain Hose

Inner diameter mm 12 —

Length mm 650 —

inch inch

G ; Half Union 5/8”

L ; Half Union 1/4” G ; (gas side) 5/8”

L ; (liquid side) 1/4”

G ; 3-way valve 5/8”

L ; 3-way valve 1/4”

G ; (gas side) 5/8”

L ; (liquid side) 1/4”

Power Cord Length m 1.9 —

Number of core-wire 3 (2.5 mm2) — Dimensions Height inch (mm) 10 - 13/16 (275) 26 - 31/32 (685)

Width inch (mm) 39 - 9/32 (998) 31 - 1/2 (800)

Depth inch (mm) 8 - 9/32 (210) 11 - 13/16 (300) Net Weight lb (kg) 24 (11.0) 139 (63.0) Compressor Type — Rotary (1 cylinder) rolling piston

type Motor Type — Induction (2-poles) Rated Output kW — 2.2

Air Circulation Type Cross-flow Fan Propeller Fan

Material ASHT-18 PC + AES + Glass Fiber 15%

Motor Type Transistor (8-poles) Induction (6-poles)

Input W 44.8 - 53.5 190.0 - 171.3 Rated Output W 30 108 Fan Speed Low rpm (1)

(2)

Cooling; 1,260 - 1,260 Heating; 1,360 - 1,360

680 - 635

(4) (3) Cooling; 1,260

635

Heating; 1,360

Medium rpm (1)

(2)

Cooling; 1,430 - 1,430 Heating; 1,430 - 1,430

—

(4) (3) Cooling; 1,430

—

Heating; 1,430

High rpm (1)

(2)

Cooling; 1,530 - 1,530 Heating; 1,580 - 1,580

1,170 - 1,140

(4) (3) Cooling; 1,530

1,140

Heating; 1,580

SuperHigh rpm (1)

(2)

Cooling; 1,580 - 1,580 Heating; 1,580 - 1,580

—

(4) (3) Cooling; 1,580

—

Heating; 1,580

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 × 26 FPI 21 16 Size (W × H × L) mm 810 × 315 × 25.4 769.2

× 660.4 × 44.0

732.9

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Unit CS-A24BK CU-A24BK

Refrigerant Control Device — Capillary Tube

Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS

Refrigerant (R-22) g (oz) — 1,770 (62.5) Thermostat Electronic Control Mechanical Control Protection Device — Inner Protector Capillary Tube Length mm — Cooling; 663, Heating; 550

Flow Rate l/min — Cooling; 13.0, Heating; 29.0 Inner Diameter mm — Cooling; 1.6, Heating; 2.4

Air Filter Material

Style Capacity Control Capillary Tube Compressor Capacitor µF, VAC — 50 µF, 370VAC Fan Motor Capacitor µF, VAC — 3.0 µF, 450VAC

P.P.

Honeycomb

M60 (1,130)

—

Note:

•

Specifications are subject to change without notice for further improvement.

•

(1) — CS-A24BKP/CU-A24BKP5 (Europe).

•

(2) — CS-A24BKP-2/CU-A24BKP5-2 (Oceania).

•

(3) — CS-A24BKP-3/CU-A24BKP5-3 (Argentina).

•

(4) — CS-A24BKP-6/CU-A24BKP5-6 (Turkey).

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

4 Dimensions

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

5 Refrigeration Cycle Diagram

6 Block Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

7 Wiring Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

8 Operation Details

8.1. Cooling Mode Operation

Cooling in operation according to Remote Control setting.

Time Delay Safety Control (3 minutes)

When the compressor is stopped by Remote Contro l, it restarts after 3 minutes when the Remote Control is turned ON.

•

When the setting temperature is reached during cooling operation, the compressor stops and it will not start for 3 minutes.

•

7 minutes Time Save Control

The compressor will start automatically if it has stopped for 7 minutes even if the room temperature is between the compressor

•

ON temperature and OFF temperature.

Anti-Freezing Control

If the temperature of the indoor heat exchanger falls

•

continuously below 2°C for 4 minutes or more, the compressor turns off to protect the indoor heat exchanger from freezing. The fan speed setting remains the same.

Compressor will restart again when the indoor heat

•

exchanger temperature rises to 10°C (Recovery).

3 minutes waiting of Time Delay Safety Control is valid for Cooling Operation.

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 2 minutes, compressor will stop and restart automatically. (Time Delay Safety Control is valid)

▲

T = Intake air temperature - Indoor heat exchanger temperature

This is to protect reverse rotation of the compressor when there is a instantaneous power failure.

Anti-Dew Formation Control

Purpose is to prevent dew formation on indoor unit air discharge area.

•

When the following conditions occur for 30 minutes continuously, anti-dew formation is controlled by indoor fan speed shift to

•

low (Changed to Lo

Indoor intake air temperature is more than 24°C and less than 30°C.

−

Remote Control setting temperature is less than 25°C.

−

Compressor is on.

−

Cooling operation mode.

−

Indoor Fan motor operate at Low fan speed.

−

This control is cancelled immediately when above condition is changed.

•

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Automatic Fan Speed Mode

When Autom atic Fan Speed is selected at Remote Control during cooling operation.

Fan speed rotates in the range of Hi to Me.

•

Deodorizing Control.

•

Cooling Opera tion Time Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

8.2. Soft Dry Mode Operation

The unit starts cooling operation until the room temperature reaches the setting temperature set on the Remote Control, and

•

then Soft Dry operation will start. During Soft Dry operation, the Indoor Fan will operate at SLo speed.

•

Once room temperature reaches below Soft Dry OFF temperature. Indoor Fan, Compressor and Outdoor Fan stop for 6

•

minutes.

Time Delay Safety Control

Once the compressor stops, it will not start for 3 minutes during Cooling operation.

•

Anti-Freezing Control

Same as Anti-Freezing Control for Cooling Mode operation. (For Soft Dry region, 6 minutes waiting is valid during compressor

•

stops.)

Compressor Reverse Rotation Protection Control

Same as Compressor Reverse Rotation Protection Control for Cooling Mode Operation. (For Soft Dry region, 6 minutes waiting

•

is valid during compressor stops.)

Anti-Dew Formation Control

Same as Anti-Dew Formation Control for Cooling Mode operation.

•

Automatic Fan Speed Mode

When Autom atic Fan Speed is selected at Remote Control during Soft Dry operation.

Fan speed off and on at SLo speed.

•

Deodorizing Control.

•

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Soft Dry Operation Time Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

8.3. Heating Mode Operation

Heating in operation according to Remote Control setting.

•

Time Delay Safety Control

When the compressor is stopped by Power Switch, Remote Control or there is a power failure, it restarts after 3 minutes when

•

the Power Switch, Remote Control is turned ON or the power supply is resumed. When the setting temperature is reached during heating operation, the compressor stops and it will not start for 4 minutes.

•

Overload Protection Control

(a) Outdoor Fan Control

If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop, when Outdoor

•

Heat Exchanger temperature is T The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49°C.

or more according to Outdoor Air Temperature region as table below:

During starting of Heating mode and after deice, Outdoor Fan ON for 90 sec. (Hi).

(b) Compressor High Pressure Control

If the indoor heat exchanger becomes 68°C or more, the compressor will stop and restart automatically.

•

(Time Delay Safety Control - 4 minutes waiting).

4-way Valve Control

4-way valve ON during Heating operation, except deicing operation.

•

When the unit is switched to “OFF” during Heating operation, 4-way valve stays at Heating position for 5 minutes.

•

Hot Start Control

When Heating operation starts, Indoor Fan will not start until the indoor heat exchanger reaches 30°C as diagram shown.

Hot Start is completed when indoor heat exchanger reaches 42°C. Maximum Hot start duration = 4 minutes. After 4 minutes, Hot start operation will be shifted to normal Heating operation.

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Automatic Fan Speed Mode

When Autom atic Fan Speed is selected at Remote Control during heating operation.

Fan speed rotates in the range of Me→SLo according to the heat exchanger temperature.

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Anti Cold Draft Control

Heating Opera tion Time Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

Deicing Control

Deice starts to prevent frosting at outdoor heat exchanger.

Normal Deicing

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Deice operation detection commences in Heating operation starts or 60 minutes after previous deice operation. If the outdoor piping temperature drops to -4°C or 50 sec. continuously during compressor is in operation, deice will start.

(There is no detection during Outdoor Fan stops.)

Overload Deicing

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During heating operation, if the outdoor Fan OFF duration (due to overload control) is accumulated up to 60 minutes and after compressor starts for 1 minutes, deicing starts.

Deicing ends when

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(a) 12 minutes after deicing operation starts; (b) The outdoor piping temperature rises to about 12°C.

After deicing operation, compressor stops for 30 seconds and 4-way valve stays at cooling position for 10 seconds.

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CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

a) Normal Deicing Time Diagram

(b) Overload Deicing Time Diagram

CS-A18BKP CU-A18BKP5 / CS-A24BKP CU-A24BKP5

8.4. Automatic Mode Operation

1. When the Automatic Mode Operation is selected, the indoor fan operates at SLo fan speed for 25 seconds to sense intake air temperature and determine the 1st operation mode. If indoor intake air temperature is less than 16°C, Heating mode will immediate operate.

2. Operation mode will be determine again 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 operation mode will be continued, if the room temperature does not reach to set temperature (Compressor keeps running) eventhough 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 23°C Soft Dry Not Applicable (Judgemen t: (Judgement:

Heating 23°C & Above) Below 23°C)

O O

Heating Cooling (Judgement: Not Applicable (Judgemen t:

23°C Heating Above 23°C) 23°C & below)

Automatic Set Temperature Refer 3. as below.

3. Automatic Set Temperature For each operation, set temperature will automatically set as shown below. However it can be selected 2°C higher or 2°C lower from standard set tempe rature by pressing the “Room Temperature Setting

button”.

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 mode judging temperature and standa rd setting temperature can be increased by 2°C, by open the circuit of JX1 at

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indoor electronic controller.

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