Panasonic CS-C18BKP, CU-C18BKP5, CU-C24BKP5, CU-C18BKP6, CU-C24BKP6 Service Manual

1 Features 2
2 Functions

3

3 Product Specifications

6

4 Dimensions

14

5 Refrigeration Cycle Diagram

16

6 Block Diagram

17

7 Wiring Diagram

18

8 Operation Details

19

9 Operating Instructions

29

10 Installation Instructions

34

© 2001 Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D). All rights reserved. Unauthorized copying
and distribution is a violation of law.

CS-C18BKP CU-C18BKP5
CS-C18BKP CU-C18BKP6
CS-C24BKP CU-C24BKP5
CS-C24BKP CU-C24BKP6

11 3-way Valve 44
12 Servicing Information

57

13 Troublesh ooting Guide

61

14 Technical Data

63

15 Exploded View

66

16 Replaceme nt Parts List

67

17 Exploded View

69

18 Replaceme nt Parts List

70

19 Electronic Circuit Diagram

73

Room Air Conditioner

CONTENTS

Page Page

Order No. MAC0111061C0

E25

•

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

−

External OLP to protect compressor (C18BKP6 only)
other inner protector

−

Noise prevention during soft dry operation

−

Anti-dew Formation Control (Cooling & Soft Dry)

−

Blue Coated Condenser (Gold Coated Condenser for
Panama only)

−

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

1 Features

2

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

2 Functions

Remote Control

Operation OFF / ON

OFF / ON I

Room Temperature Setting

TEMP.

Operation Mode Selection

•

AUTO

Automatic Operation Mode

•

COOL

Cooling Operation Mode

•

DRY

Soft Dry Operation Mode

•

FAN

Air Circulation Mode

MODE

TIME

Time / Timer Setting

• Hours and minutes setting.

Clock Setting

• Current time setting.

Sleep Mode Operation OFF / ON

SLEEP

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 Mode Operation OFF/ON

POWERFUL

Economy Mode Operation OFF/ON

ECONOMY

Cooling, Soft Dry, Air Circulation 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.

Self illuminating

button

3

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Indoor Unit

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)

Sleep Mode Auto Control

• Indoor Fan operates at Low speed.

• Operation stops after 8 hours.

Indoor Fan Speed Control

• High, Medium and Low.

• Automatic Fan Speed Mode
– Cooling : Fan rotates at Hi, Me and

SLo speed. Deodorizing
control is available.

– Soft Dry: Fan rotates at SLo speed.

Deodorizing control
is available.

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

Airflow Direction Control

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.

AUTO

OFF / ON

Operation Indication Lamps (LED)

•

POWER

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

blinks in Automatic
Operation Mode
judging.

•

SLEEP

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

Mode Operation.

•

TIMER

(Orange) .......Lights up in Timer

Setting.

•

POWERFUL

(Orange)..Lights up in Powerful

Mode Operation.

•

ECONOMY

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

Mode Operation.

Operation Mode

• Cooling, Soft Dry, Air Circulation and
Automatic Mode.

Powerful Operation

• Reaches the desired room temperature
quickly.

Time Delay Safety Control

•

Restarting is inhibited for appro. 3 minutes.

Economy Operation

• To reduce electrical power consumption.

7 Minutes Time Save Control

• Cooling Operation only.

Anti-Dew Formation Control

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

4

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Outdoor Unit

• To protect compressor from reverse
rotation when there is a 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

• 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.

5

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

3 Product Specifications

Unit CS-C18BK CU-C18BK

Power Source Phase, Voltage, Cycle (1)

(7)

Single, 230 - 220, 50 Hz

(2) Single, 220, 60 Hz
(3) Single, 240 - 230, 50 Hz
(4) Single, 220, 50 Hz
(5)

(6)

Single, 230 - 208, 60 Hz

Cooling Capacity kW (BTU/h) (1)

(3)
(7)

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

(2)
(4)

5.30 (18,100)

(5)
(6)

5.20 - 5.20 (17,700 - 17,700)

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

(2)
(3)
(7)

2.9 (6.1)

(5)
(6)

2.0 (4.2)

Airflow Method OUTLET

INTAKE

SIDE VIEW TOP VIEW

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

(3)
(7)

12.8 (450) - 12.8 (450) —

(2)
(4)

12.8 (450) —

(5)
(6)

11.4 (400) - 11.4 (400) —

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

(3)
(7)

13.8 (490) - 13.8 (490) —

(2)
(4)

13.8 (490) —

(5)
(6)

12.3 (430) - 12.3 (430) —

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

(3)
(7)

14.9 (530) - 14.9 (530) —

(2)
(4)

14.9 (530) —

(5)
(6)

13.3 (470) - 13.3 (470) —

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

(3)
(7)

15.5 (550) - 15.5 (550) —

(2)
(4)

15.5 (550) —

(5)
(6)

13.8 (490) - 13.8 (490) —

Noise Level dB (A) (1)

(7)

High 42 - 42, Low 37 - 37 High 55 - 54

(2)
(4)

High 42, Low 37 High 54

(3) High 42 - 42, Low 37 - 37 High 56 - 55
(5)

(6)

High 42 - 42, Low 37 - 37 High 56 - 54

6

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Unit CS-C18BK CU-C18BK

Power level dB (1) 54 - 54 70 - 70

(2)
(4)
(5)
(6)
(7)

— —

(3) 54 - 54 71 - 70

Electrical Data Input Power kW (1)

(7)

1.76 - 1.72

(2)
(4)

1.72

(3) 1.81 - 1.78
(5)

(6)

1.78 - 1.74

Running Current A (1)

(7)

7.8 - 8.0

(2)
(4)

8.0

(5)
(6)

7.9 - 8.5

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

(7)

3.01 - 3.08 (10.28 - 10.52)

(2)
(4)

3.08 (10.52)

(3) 2.93 - 2.98 (10.00 - 10.17)
(5)

(6)

2.9 - 3.0 (9.9 - 10.1)

Starting Current A (1)

(7)

38.0

(2)
(5)
(6)

47.0

(4) 36.0

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) 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) (1)

(3)
(4)
(7)

24 (11.0) 121 (55.0)

(2)
(5)
(6)

24 (11.0) 106 (48.0)

Compressor Type — Rotary (1 cylinder)

rolling piston type
Motor Type — Induction (2-poles)
Rated Output kW (1)

(3)
(4)
(7)

— 1.5

(2)
(5)
(6)

— 1.2

7

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Unit CS-C18BK CU-C18BK

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 (1)

(3)
(4)
(7)

30 72

(2)
(5)
(6)

30 52

Fan Speed Low rpm (1)

(3)
(5)
(6)
(7)

1,130 - 1,130 —

(2)
(4)

1,130 —

Medium rpm (1)

(3)
(5)
(6)
(7)

1,220 - 1,220 —

(2)
(4)

1,220 —

High rpm (1)

(3)
(5)
(6)
(7)

1,320 - 1,320 1,020 - 980

(2)
(4)

1,320 980

SuperHigh rpm (1)

(3)
(5)
(6)
(7)

1,370 - 1,370 —

(2)
(4)

1,370 —

Heat Exchanger Description Evaporator Condenser

Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue/Gold Coat)
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)

2×15 2×31
FPI 21 18
Size (W × H × L) mm 810 × 315 × 25.4 775.2

754.5

× 651.0 × 25.4

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

M60 (700)

Refrigerant (R-22) g (oz) (1)

(3)
(4)
(7)

— 1,160 (40.9)

(2)
(5)
(6)

— 1,240 (43.8)

Thermostat Electronic Control Mechanical Control
Protection Device — Inner Protector
Capillary Tube Length mm — 611

Flow Rate l/min — 27.0
Inner Diameter mm — 2.1

Air Filter Material

Style

P.P.

Honeycomb

—

Capacity Control Capillary Tube
Compressor Capacitor µF, VAC — 45 µF, 370VAC
Fan Motor Capacitor µF, VAC — 3.5 µF, 450VAC

8

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Note:

•

Specifications are subject to change without notice for further improvement.

•

(1) — CS-C18BKP/CU-C18BKP5 (Europe).

•

(2) — CS-C18BKP-1/CU-C18BKP6-1 (Panama).

•

(3) — CS-C18BKP-2/CU-C18BKP5-2 (Oceania).

•

(4) — CS-C18BKP-3/CU-C18BKP5-3 (Argentina).

•

(5) — CS-C18BKP-4/CU-C18BKP6-4 (U.S.A).

•

(6) — CS-C18BKP-5/CU-C18BKP6-5 (Canada).

•

(7) — CS-C18BKP-6/CU-C18BKP5-6 (Turkey).

9

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Unit CS-C24BK CU-C24BK

Power Source Phase, Voltage, Cycle (1)

(7)

Single, 230 - 220, 50 Hz

(2) Single, 220, 60 Hz
(3) Single, 240 - 230, 50 Hz
(4) Single, 220, 50 Hz
(5)

(6)

Single, 230 - 208, 60 Hz

Cooling Capacity kW (BTU/h) (1)

(7)

7.03 - 7.03 (24,000 - 24,000)

(2)
(4)

7.03 (24,000)

(3) 6.85 - 6.85 (23,400 - 23,400)
(5)

(6)

6.82 - 6.82 (23,200 - 23,200)

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

(4)
(7)

4.0 (8.5)

(3) 3.9 (8.2)
(5)

(6)

3.1 (6.6)

Airflow Method OUTLET

INTAKE

SIDE VIEW TOP VIEW

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

(3)
(7)

13.9 (490) - 13.9 (490) —

(2)
(4)

13.9 (490) —

(5)
(6)

12.4 (440) - 12.4 (440) —

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

(3)
(7)

15.4 (540) - 15.4 (540) —

(2)
(4)

15.4 (540) —

(5)
(6)

13.8 (490) - 13.8 (490) —

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

(3)
(7)

16.9 (600) - 16.9 (600) —

(2)
(4)

16.9 (600) —

(5)
(6)

15.1 (530) - 15.1 (530) —

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

(3)
(7)

17.5 (620) - 17.5 (620) —

(2)
(4)

17.5 (620) —

(5)
(6)

15.6 (550) - 15.6 (550) —

Noise Level dB (A) (1)

(7)

High 46 - 46, Low 40 - 40 High 60 - 59

(2)
(4)

High 46, Low 40 High 59

(3) High 46 - 46, Low 40 - 40 High 61 - 60
(5)

(6)

High 46 - 46, Low 40 - 40 High 61 - 59

Power level dB (1) 59 - 59 74 - 74

(2)
(4)
(5)
(6)
(7)

— —

(3) 59 - 59 75 - 74

10

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Unit CS-C24BK CU-C24BK

Electrical Data Input Power kW (1)

(7)

2.60 - 2.41

(2) 2.55
(3) 2.64 - 2.54
(4) 2.41
(5)

(6)

2.68 - 2.64

Running Current A (1)

(7)

12.4 - 11.8

(2) 12.0
(4) 11.8
(5)

(6)

12.1 - 13.1

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

(7)

2.70 - 2.92 (9.23 - 9.96)

(2) 2.76 (9.41)
(3) 2.60 - 2.70 (8.86 - 9.21)
(4) 2.92 (9.96)
(5)

(6)

2.5 - 2.6 (8.6 - 8.7)

Starting Current A (1)

(7)

65.0

(2)
(4)
(5)
(6)

63.0

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) 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) (1)

(3)
(4)
(7)

24 (11.0) 132 (60.0)

(2)
(5)
(6)

24 (11.0) 133 (60.5)

Compressor Type — Rotary (1 cylinder) rolling

piston type
Motor Type — Induction (2-poles)
Rated Output kW (1)

(4)
(7)

— 2.2

(2)
(5)
(6)

— 1.8

11

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Unit CS-C24BK CU-C24BK

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 (1)

(3)
(4)
(7)

30 108

(2)
(5)
(6)

30 118

Fan Speed Low rpm (1)

(3)
(5)
(6)
(7)

1,220 - 1,220

—

(2)
(4)

1,220 —

Medium rpm (1)

(3)
(5)
(6)
(7)

1,350 - 1,350 —

(2)
(4)

1,350 —

High rpm (1)

(3)
(5)
(6)
(7)

1,480 - 1,480 1,180 - 1,155

(2)
(4)

1,480 1,155

SuperHigh rpm (1)

(3)
(5)
(6)
(7)

1,530 - 1,530 —

(2)
(4)

1,530 —

Heat Exchanger Description Evaporator Condenser

Tube material Copper Copper
Fin material Aluminium (Pre Coat) Aluminium (Blue/Gold Coat)
Fin Type Slit Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)

2 × 15 2 × 26
FPI 21 18
Size (W × H × L) mm 810 × 315 × 25.4 769.2

732.9

× 660.4 × 44.0

Refrigerant Control Device — Capillary Tube

Refrigeration Oil (cm3) — SUNISO 4GDID or ATMOS

M60 (1,130)

Refrigerant (R-22) g (oz) (1)

(3)
(4)
(5)
(6)
(7)

— 1,730 (61.1)

(2) — 1,700 (60.0)
Thermostat Electronic Control Mechanical Control
Protection Device — Inner Protector
Capillary Tube Length mm — 675

Flow Rate l/min — 25.5
Inner Diameter mm — 2.1

Air Filter Material

Style

P.P.

Honeycomb

—

Capacity Control Capillary Tube
Compressor Capacitor µF, VAC — 45 µF, 370VAC
Fan Motor Capacitor µF, VAC — 3.5 µF, 450VAC

12

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

Note:

•

Specifications are subject to change without notice for further improvement.

•

(1) — CS-C24BKP/CU-C24BKP5 (Europe).

•

(2) — CS-C24BKP-1/CU-C24BKP6-1 (Panama).

•

(3) — CS-C24BKP-2/CU-C24BKP5-2 (Oceania).

•

(4) — CS-C24BKP-3/CU-C24BKP5-3 (Argentina).

•

(5) — CS-C24BKP-4/CU-C24BKP6-4 (U.S.A).

•

(6) — CS-C24BKP-5/CU-C24BKP6-5 (Canada).

•

(7) — CS-C24BKP-6/CU-C24BKP5-6 (Turkey).

13

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

4 Dimensions

14

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

15

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

5 Refrigeration Cycle Diagram

16

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

6 Block Diagram

17

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

7 Wiring Diagram

CS-C18BKP CU-C18BKP5 / CS-C18BKP CU-C18BKP6 / CS-C24BKP CU-C24BKP5 / CS-C24BKP CU-C24BKP6

18

Cooling in operation according to Remote Control setting.

Time Delay Safety Control (3 minutes)

7 minutes Time Save Control

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

Anti-Dew Formation Control

8 Operation Details

8.1. Cooling Mode Operation

•

When the compressor is stopped by Remote Control, 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.

•

The compressor will start automatically if it has stopped for 7 minutes even if the room tempe rature is between the compressor
ON temperature and OFF temperature.

•

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.

•

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.

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Automatic Fan Speed Mode

Cooling Operation Time Diagram

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.

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Time Delay Safety Control

Anti-Freezing Control

Compressor Reverse Rotation Protection Control

Anti-Dew Formation Control

Automatic Fan Speed Mode

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.

•

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

•

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

•

Same as Compressor Reverse Rotation Protection Control for Cooling Mode Operation. (For Soft Dry region, 6 minutes waiting
is valid during compressor stops.)

•

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

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

•

Fan speed off and on at SLo speed.

•

Deodorizing Control.

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Soft Dry Operation Time Diagram

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Air Circulation Mode Operation Time Diagram

Standard for Determining Operation Mode

8.3. Air Circulation Mode Operation

•

When the temperature near the ceiling reaches the setting temperature, Air Circulation Mode operation commences at low
airflow volume. It stops when the temperature drops to 2°C below the setting temperature.

8.4. Automatic Mode Operation

•

Indoor fan operates at SLo fan speed for 20 seconds.

•

After judging indoor air temperature, the operation mode is determined and operation continued at the mode determined.

•

After the operation mode has been determined, the mode does not change. However, Soft Dry mode operation includes
Cooling mode operation.

•

Room temperature adjustment.
The following are added to the setting temperature specified as above.

•

The mode judging temperature and standard setting temperature can be increased by 2°C, by open the circuit of JX1 at indoor
electronic controller.

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Cooling or Soft Dry Operation

Purpose is to obtain a comfortable room temperature while
sleeping. When you press the SLEEP Mode, the following
movement will start to avoid overcooling.

•

Sleep shift operation starts, when the room temperature
reaches the setting temperature or after 1 hour of operation.

•

The setting temperature will be risen by 0.5°C at the start of
operation and by 0.5°C one hour later.

•

The airflow volume will automatically change to Low fan
speed.

•

Sleep Mode operation time is 8 hours, the operation will be
stop after 8 hours.

•

When used together with the Timer, the Timer has priority.

8.5. Sleep Mode Auto Operation

8.6. Powerful Mode Operation

•

Purpose of this operation is to obtain the setting temperature quickly.

•

When the Powerful Mode is set, the set temperature will be automatically decreased 3°C against the present setting
temperature (Lower temperature: 16°C).

•

This operation automatically will be running under SHi Fan Speed (Cooling), SLo Fan Speed (Soft Dry).

•

Vertical Airflow Direction:-

-In“Manual” setting, the vane will automatically swing down 10° lower than previous setting.

-In“Auto” setting, the vane will automatically swing up and down. However the lower limit will be shifted 10° downward.

•

Powerful Mode will operate for 15 minutes only, after that it will shift back to previous operation mode.

•

Powerful Mode will stop if:-

- Powerful mode button is pressed again.

- Stopped by ON / OFF switch.

- Timer OFF activates.

- Economy mode button is pressed.

- Sleep mode is pressed.

- Operation mode button is changed.

8.7. Economy Mode Operation

•

Purpose of this operation is to save or reduced electrical power consumption of the room air conditioner.

•

When the Economy Mode is set, the set temperature will be automatically increased 0.5°C against the preset setting
temperature (Higher temperature: 30°C).

•

This operation automatically will be running under SLo Fan Speed.

•

Vertical Airflow Direction:­In “Manual” or “Auto” setting, the vane will automatically change to Auto Air Swing.

•

Economy Mode will stop if:-

- Economy Mode button is pressed again.

- Stopped by ON / OFF switch.

- Timer OFF activates.

- Powerful mode button is pressed.

- Auto or Manual air swing button is pressed.

- Fan Speed control button is pressed.

- Sleep Mode button is pressed ON.

- Operation Mode is changed.

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