Panasonic CS-A28BKP5 User manual

1 Features 2
2 Functions 3
3 Product Specifications 6
4 Dimensions 8
5 Refrigeration Cycle Diagram 9
6 Block Diagram 10
7 Wiring Diagram 11
8 Operation Details 12
9 Operating Instructions 22
10 Installation Instructions 42
©2002Matsushita Air-Conditioning Corp. Sdn. Bhd.
(183914D) All rights reserved. Unauthorized copying
and distribution is a violation of law.
CS-A28BKP5/CU-A28BKP5
11 3-way Valve 51
12 Servicing Information 58
13 Troubleshooting Guide 62
14 Technical Data 64
15 Exploded View 67
16 Replacement Parts List 68
17 Exploded View 69
18 Replacement Parts List 70
19 Electronic Parts List 71
20 Electronic Circuit Diagram 72
Room Air Conditioner
CONTENTS
Page Page
OrderNo:TAC0204001C2

•High Efficiency
• High EfficiencyAirflow Circuit
• CompactDesign
• Auto Restartafter Power Failure
• Long Piping up to 30m
•Catechin Deodorizing AirFilter
• Deodorizing Controlduring operation
• Cold draughtControl
1 Features
2
CS-A28BKP5/CU-A28BKP5

2 Functions
Remote Control
Operation OFF / ON
OFF / ON IRoom Temperature Setting
TEMP.
• Temperature Setting (16˚C to 30˚C)
• Automatic Operation
m / n 2˚C lower than standard
n Standard
n - o 2˚C higher than standard
Operation Mode Selection
•AUTO Automatic Operation Mode
•HEAT Heating Operation Mode
•COOL Cooling Operation Mode
•DRY Soft Dry Operation 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
•h j k Low Speed
l
•h j k Medium Speed
lll
•h j k High Speed
lllll
•AUTOFAN Automatic Fan Speed
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
(q)
AIR SWING
•SWING Automatic Airflow Direction
Control
•MANUAL Airflow Direction Manual
Control
3
CS-A28BKP5/CU-A28BKP5

Indoor Unit
Auto Restart Control
•Operation is restarted 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 fan
speed.
•Operation stops after 8 hours.
Indoor Fan Speed Control
•High, Medium and Low.
•Automatic Fan Speed Mode
–Heating : Fan speed varies from Hi
SLo in accordance with
indoor heat exchanger.
–Cooling : Fan rotates at Hi and Me
speed. Deodorizing control
is available.
–Soft Dry: Fan rotates at Lo speed.
Hot-Start Control
•Automatic air swing and manual adjusted
by remote control for vertical airflow.
•Manually adjusted by hand for horizontal
airflow.
Airflow Direction Control
•The indoor fan stops until the indoor heat
exchanger temperature over 30°C.
•The indoor fan operates at SLo and Lo
when indoor heat exchanger temperature
reaches 30°C ~ 42°C.
•Hot start is completed when indoor heat
exchanger reaches 42°C.
Auto Operation Switch
•Used when the remote control cannot be
used.
AUTO
OFF / ON
Remote Control Signal Receiving
Sound Control
•It can be controlled by pressing Auto
Operation Switch for 10 seconds.
Operation Test Running / Pump
Down Switch
TEST RUN
OFF / ON
•Used when test running or servicing.
Operation Indication Lamps (LED)
•POWER (Red)........ Lights up in operation,
blinks in Automatic
Operation Mode judging
and Hot Start operation.
•SLEEP (Orange).... Lights up in Sleep
Mode Operation.
•TIMER (Orange).... Lights up in Timer
Setting.
Operation Mode
•Heating, Cooling, Soft Dry, and Automatic
Mode.
Time Delay Safety Control
•Restarting is inhibited for appro. 3 minutes.
7 Minutes Time Save Control
•Cooling Operation only.
➝
4
CS-A28BKP5/CU-A28BKP5

Outdoor Unit
4-Way Valve Control
•When the unit is switched to “OFF”
during Heating operation, 4-way valve
stays at Heating Position for 5 minutes.
60 Secs. Forced Operation Control
•Once the compressor is activated, it
does not stop for 60 secs. (Stops imme-
diately with remote control stop signal.)
Outdoor Fan Operation Control
• 4-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.
Overload Protector
•Inner protector (Compressor, Fan Motor).
Deice Control
• To prevent frosting at outdoor heat
exchanger during Heating Operation.
5
CS-A28BKP5/CU-A28BKP5

3 Product Specifications
Unit CS-A28BKP5 CU-A28BKP5
Cooling Capacity kW
Btu/h 7.92 -7.80 27,000 - 26,600
Heating Capacity kW
Btu/h 8.35 -8.25 28,500 -28,200
Moisture Removal l/h
Pint/h 4.6 9.7
Power Source Phase
V
Cycle
Single
230 -220
50
Airflow Method OUTLET
INTAKE
SIDE VIEW TOP VIEW
Air Volume Indoor Air (Lo) m3/min (cfm) Cooling; 14.2 (501) —
Heating; 15.6 (551)
Indoor Air (Me) m3/min (cfm) Cooling; 15.0 (530) —
Heating; 16.4 (579)
Indoor Air (Hi) m3/min (cfm) Cooling; 16.3 (575) —
Heating; 17.7 (625)
Outdoor Air m3/min (cfm) —Cooling; 59.0 (2,083)
Heating; 59.2 (2,090)
Noise Level dB (A) Cooling; 48/46/44 Cooling; 63/55
Heating; 48/44 Heating; 63/55
Electrical Data Input kW Cooling; 2.62 -2.60
Heating; 2.88 -2.85
Running Current ACooling; 12.2 -12.5
Heating; 13.2 -13..5
COP W/W Cooling; 3.0 -3.0
Heating; 2.9 -2.9
Starting Current A76
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 14 —
Length m0.73 —
6
CS-A28BKP5/CU-A28BKP5

Power Cord Length
Number of core-wire m2.1 3 (2.5 mm2)— —
Dimensions Height inch (mm) 14 - 9/16 (370) 26 - 31/32 (685)
Width inch (mm) 48 - 1/32 (1,220) 34 - 21/32 (880)
Depth inch (mm) 8 - 21/32 (220) 13 - 19/32 (345)
Net Weight lb (kg) 40 (18) 150 (68)
Compressor Type —Scroll type
Motor Type —Induction (2-poles)
Rated Output kW —2.11
Air Circulation Type Cross-flow Fan Propeller Fan
Material AS + Glass Fiber 30% AS +Glass Fiber 20%
Motor Type Induction (4-poles) Induction (4-poles)
Input W— —
Rated Output W40 100
Fan Speed Low rpm Cooling; 1,262 Heating; 1,250 920 - 880
Medium rpm Cooling; 1,322 Heating; 1,328 —
High rpm Cooling; 1,418 Heating; 1,420 1,200 - 1,170
Heat Exchanger Description Evaporator Condenser
Tube material Copper Copper
Fin material Aluminium Aluminium
Fin Type Louver Louver
Row / Stage (Plate fin configuration, forced draft)
2×10 2×26
FPI 18 18
Size (W × H × L) mm 966.5 × 254 × 44 826 × 663.9 × 44
Refrigerant Control Device —Capillary Tube
Refrigeration Oil (cm3) — SONTEX
200 LT (1,242)
Refrigerant (R-22) g (oz) —1,800 (63.5)
Thermostat Electronic Control Electronic Control
Protection Device Inner Protector Inner Protector
Capillary Tube Length mm —Cooling; 850, Heating; 1,200
Flow Rate l/min —Cooling; 21.8, Heating; 23 (1/2 ATM)
Inner Diameter mm —Cooling; 2.0, Heating; 2.4
Air Filter Material
Style A.B.S Honeycomb —
Compressor Capacitor µF, VAC —50 µF, 370VAC
Fan Motor Capacitor µF, VAC 2.0 µF, 450VAC 3.0 µF, 450VAC
• Specifications are subject to change without notice for further improvement.
7
CS-A28BKP5/CU-A28BKP5

4Dimensions
8
CS-A28BKP5/CU-A28BKP5
CS-A28BKP5/ CU-A28BKP5

CS-A28BKP5/CU-A28BKP5
5Refrigeration Cycle Diagram
9
CS-A28BKP5/CU-A28BKP5
CS-A28BKP5/CU-A28BKP5
Dimensions
CS-A28BKP5/CU-A28BKP5
CS-A28BKP5/CU-A28BKP5

6Block Diagram
10
CS-A28BKP5/CU-A28BKP5
CS-A28BKP5/CU-A28BKP5

7 Wiring Diagram
11
CS-A28BKP5/CU-A28BKP5
CS-A28BKP5 / CU-A28BKP5

Cooling in operation according to Remote Control setting.
Time Delay Safety Control (3 minutes)
7 minutes Time Saved Control
Anti-Freezing Control
• If the temperature of the indoor heat exchanger falls
continuously below 2°C for 4 minutes, the compressor turns
off to protect the indoor heat exchanger from freezing. The
fan speed setting remains the same.
• Compressor recommences when the indoor heat
exchanger temperature rises to 10°C (Recovery).
3 minutes waiting of Time Delay Safety Control is
valid for Cooling Operation.
8 Operation Details
8.1. Cooling Mode Operation
• 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 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 temperature is below the compressor
ON temperature.
12
CS-A28BKP5/CU-A28BKP5

Automatic Fan Speed Mode
Cooling Operation Time Diagram
When Automatic Fan Speed is selected at Remote Control during cooling operation.
• Fan speed rotates in the range of Hi to Me.
• Deodorizing Control.
13
CS-A28BKP5/CU-A28BKP5

Time Delay Safety Control
Anti-Freezing 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 operates with Lo 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.)
When Automatic Fan Speed is selected at Remote Control during Soft Dry operation.
• Fan speed rotates at Lo speed.
• Deodorizing Control.
14
CS-A28BKP5/CU-A28BKP5

Soft Dry Operation Time Diagram
15
CS-A28BKP5/CU-A28BKP5

• Heating in operation according to Remote Control setting.
Time Delay Safety Control
30 minutes Time Saved Control
Overload Protection Control
4-way Valve Control
Hot Start Control
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.
8.3. Heating Mode Operation
• 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.
• The compressor will start automatically if it has stopped for 30 minutes even if the room temperature is below the compressor
OFF temperature.
• 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 Tbor 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).
• 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 ON during Heating operation, except deicing operation.
• When the unit is switched to “OFF”during Heating operation, 4-way valve stay at Heating position for 5 minutes.
When Heating operation starts, Indoor Fan will not start until the indoor heat exchanger reaches 30°C as diagram shown.
16
CS-A28BKP5/CU-A28BKP5

Automatic Fan Speed Mode
Heating Operating Time Diagram
When Automatic Fan Speed is selected at Remote Control during heating operation.
• Fan speed rotates in the range of Hi →SLo according to the heat exchanger temperature.
17
CS-A28BKP5/CU-A28BKP5

DeicingControl
a) Normal Deicing Time Diagram
Deice starts to prevent frosting at outdoor heat exchanger.
• Normal Deicing
Deice operations detection commences in Heating operation starts or 60 minutes after previous deice operation. If the
outdoorpiping temperature drops to -4°Cfor 50 sec. continuously during compressor is in operation, deice will start.
(There is no detection during Outdoor Fan stops.)
• Overload Deicing
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 minute, deicing starts.
• Deicing ends when
(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.
18
CS-A28BKP5/CU-A28BKP5

Operation Higher Standard Lower
Mode (+2°C) (±0°C) (-2°C)
Cooling 27°C25°C23°C
Soft Dry 24°C22°C20°C
Heating 23°C21°C19°C
b) Overload Deicing Time Diagram
8.4. Automatic Mode Operation
1.When the Automatic Mode Operation is selected, the indoor fan operates at SLo fan speed for 20 seconds to sense intake air
temperature and determine the 1st operation mode.
Standard for Determining Operation Mode 1st Judgement
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.
Indoor intake air is less than 16°C, Heating mode will immediate operate. (only in the first time judgement)
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.
For 2nd judgement onwards, indoor fan will operate for 20 seconds to sense the intake air temperature for determining
operation mode.
Standard for Determining Operation Mode 2nd Judgement onwards
Present Judgement Next Mode
Mode Cooling Soft Dry Heating
O O
Cooling 23°CCooling (Judgement: Not Applicable (Judgement:
Heating 23°C & Above) Below 23°C)
O O
Soft Dry 20°CSoft Dry Not Applicable (Judgement: (Judgement:
Heating 20°C & Above) Below 20°C)
O O
Heating Cooling (Judgement: Not Applicable (Judgement:
25°CHeating 25°C & Above) Below 25°C)
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 temperature by pressing the “Room Temperature Setting
button”.
19
CS-A28BKP5/CU-A28BKP5

Cooling or Soft Dry Operation
When you press the SLEEP Mode, the following movement will
start to avoid overcooling.
• The fan speed refer to Indoor Fan Motor Control.
• The setting temperature will be risen by 0.5°C at the start of
operation and by 0.5°C one hour later.
• The operation will stop after 8hours.
• When using together with the Timer, the ON-Timer has
priority.
Heating Operation
When you press the SLEEP Mode, the following movement will
start to avoid overheating.
• The fan speed refer to Indoor Fan Motor Control.
• Thesetting temperature willbe descented by
2°Cat the start
of operation and by
3°Cone hour later.
• The operation will stop after 8hours.
• When using together with the Timer, the ON-Timer has
priority.
8.5. Sleep Mode Auto Operation
8.6. Auto Restart Control
• If there is a power failure, operation will be automatically restarted when the power is resumed.
It will start with previous operation mode and airflow direction.
(Time Delay Safety Control is valid)
• Auto Restart Control is not available when Timer or Sleep Mode is set.
• This control can be omitted bycutting the jumper wire J2.(Refer Circuit Diagram)
8.7. Indoor Fan Speed Control
• Auto Fan Speed Control
When settoAuto Fan Speed, the fan speed is adjustedbetweenmaximumand minimumsetting as shown in the table.
• Manual Fan Speed Control
Basic fan speed adjustment (3 settings, from Lo to Hi) can be carried out by using the Fan Speed selection button.
Fan Speed High Speed ←→ Low Speed
Manual OOO
Cooling Auto O O O O
Sleep O
Soft Dry Manual, Auto O
Sleep O
Manual OOO
Heating Auto O O O O O O
Sleep O O O
Hi Me Lo SLo SSLo STOP
20
O
CS-A28BKP5/CU-A28BKP5