Order No:
Room Air Conditioner
CS-A28BKP5/CU-A28BKP5
CONTENTS
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Page |
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Page |
1 |
Features |
2 |
11 |
3-way Valve |
51 |
2 |
Functions |
3 |
12 |
Servicing Information |
58 |
3 |
Product Specifications |
6 |
13 |
Troubleshooting Guide |
62 |
4 |
Dimensions |
8 |
14 |
Technical Data |
64 |
5 |
Refrigeration Cycle Diagram |
9 |
15 |
Exploded View |
67 |
6 |
Block Diagram |
10 |
16 |
Replacement Parts List |
68 |
7 |
Wiring Diagram |
11 |
17 |
Exploded View |
69 |
8 |
Operation Details |
12 |
18 |
Replacement Parts List |
70 |
9 |
Operating Instructions |
22 |
19 |
Electronic Parts List |
71 |
10 |
Installation Instructions |
42 |
20 |
Electronic Circuit Diagram |
72 |
© 2002 Matsushita Air-Conditioning Corp. Sdn. Bhd. (183914D) All rights reserved. Unauthorized copying and distribution is a violation of law.
CS-A28BKP5/CU-A28BKP5
1 |
Features |
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• High Efficiency |
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Auto Restart after Power Failure |
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High Efficiency Airflow Circuit |
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Long Piping up to 30m |
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Compact Design |
• Catechin Deodorizing Air Filter |
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Deodorizing Control during operation |
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Cold draught Control |
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2 Functions
Remote Control
OFF / ON I Operation OFF / ON
MODE |
Operation Mode Selection |
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•AUTO Automatic Operation Mode
•HEAT Heating Operation Mode
•COOL Cooling Operation Mode
•DRY Soft Dry Operation Mode
FAN SPEED |
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Indoor Fan Speed Selection |
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h j k |
Low Speed |
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l |
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h j k |
Medium Speed |
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lll |
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h j k |
High Speed |
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lllll |
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AUTOFAN |
Automatic Fan Speed |
AIR SWING |
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Airflow Direction Control |
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SWING |
Automatic Airflow Direction |
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Control |
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MANUAL |
Airflow Direction Manual |
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Control |
CS-A28BKP5/CU-A28BKP5
TEMP. |
Room Temperature Setting |
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Temperature Setting (16˚C to 30˚C) |
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Automatic Operation |
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m |
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n 2˚C lower than standard |
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Standard |
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- o 2˚C higher than standard |
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ON-TIMER |
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OFF-TIMER |
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Timer Operation Selection |
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24-hour, OFF / ON Real Timer Setting. |
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TIME |
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Time / Timer Setting |
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Hours and minutes setting. |
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SET |
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CANCEL |
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Timer Operation Set / Cancel |
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ON Timer and OFF Timer setting and |
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cancellation. |
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CLOCK |
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(q) |
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Clock Setting |
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Current time setting. |
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SLEEP |
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Sleep Mode Operation OFF / ON |
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3
CS-A28BKP5/CU-A28BKP5
Indoor Unit
AUTO |
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OFF / ON |
Auto Operation Switch |
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•Used when the remote control cannot be used.
Remote Control Signal Receiving
Sound Control
•It can be controlled by pressing Auto Operation Switch for 10 seconds.
TEST RUN
OFF / ON Operation Test Running / Pump
Down Switch
• 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.
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.
Airflow Direction Control
•Automatic air swing and manual adjusted by remote control for vertical airflow.
•Manually adjusted by hand for horizontal airflow.
Hot-Start 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.
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.
Overload Protector
• Inner protector (Compressor, Fan Motor).
60 Secs. Forced Operation Control
•Once the compressor is activated, it does not stop for 60 secs. (Stops immediately 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.
Deice Control
•To prevent frosting at outdoor heat exchanger during Heating Operation.
5
CS-A28BKP5/CU-A28BKP5
3 |
Product Specifications |
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Unit |
CS-A28BKP5 |
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CU-A28BKP5 |
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Cooling Capacity |
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kW |
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7.92 - 7.80 |
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Btu/h |
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27,000 - 26,600 |
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Heating Capacity |
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kW |
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8.35 - 8.25 |
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Btu/h |
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28,500 - 28,200 |
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Moisture Removal |
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l/h |
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4.6 |
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Pint/h |
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9.7 |
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Power Source |
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Phase |
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Single |
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V |
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230 - 220 |
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Cycle |
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50 |
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Airflow Method |
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OUTLET |
SIDE VIEW |
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TOP VIEW |
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INTAKE |
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Air Volume |
Indoor Air (Lo) |
m3/min (cfm) |
Cooling; 14.2 (501) |
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Heating; 15.6 (551) |
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Indoor Air (Me) |
m3/min (cfm) |
Cooling; 15.0 (530) |
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Heating; 16.4 (579) |
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Indoor Air (Hi) |
m3/min (cfm) |
Cooling; 16.3 (575) |
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Heating; 17.7 (625) |
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Outdoor Air |
m3/min (cfm) |
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Cooling; 59.0 (2,083) |
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Heating; 59.2 (2,090) |
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Noise Level |
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dB (A) |
Cooling; 48/46/44 |
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Cooling; 63/55 |
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Heating; 48/44 |
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Heating; 63/55 |
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Electrical Data |
Input |
kW |
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Cooling; 2.62 -2.60 |
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Heating; 2.88 - 2.85 |
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Running Current |
A |
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Cooling; 12.2 - 12.5 |
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Heating; 13.2 - 13..5 |
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COP |
W/W |
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Cooling; 3.0 - 3.0 |
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Heating; 2.9 - 2.9 |
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Starting Current |
A |
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76 |
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Piping Connection Port |
inch |
G ; Half Union 5/8” |
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G ; 3-way valve 5/8” |
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(Flare piping) |
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inch |
L ; Half Union 1/4” |
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L ; 3-way valve 1/4” |
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Pipe Size |
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inch |
G (gas side); 5/8” |
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G (gas side); 5/8” |
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(Flare piping) |
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inch |
L (liquid side); 1/4” |
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L (liquid side); 1/4” |
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Drain |
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Inner diameter |
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14 |
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Hose |
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Length |
m |
0.73 |
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CS-A28BKP5/CU-A28BKP5 |
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Power Cord Length |
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m |
2.1 |
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Number of core-wire |
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3 (2.5 mm2) |
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Dimensions |
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Height |
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inch (mm) |
14 - 9/16 (370) |
26 - 31/32 (685) |
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Width |
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inch (mm) |
48 - 1/32 (1,220) |
34 - 21/32 (880) |
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Depth |
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inch (mm) |
8 - 21/32 (220) |
13 - 19/32 (345) |
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Net Weight |
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lb (kg) |
40 (18) |
150 (68) |
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Compressor |
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Type |
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Scroll type |
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Motor |
Type |
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Induction (2-poles) |
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Rated |
Output |
kW |
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2.11 |
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Air Circulation |
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Type |
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Cross-flow Fan |
Propeller Fan |
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Material |
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AS + Glass Fiber 30% |
AS + Glass Fiber 20% |
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Motor |
Type |
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Induction (4-poles) |
Induction (4-poles) |
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Input |
W |
— |
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Rated |
Output |
W |
40 |
100 |
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Fan Speed |
Low |
rpm |
Cooling; 1,262 Heating; 1,250 |
920 - 880 |
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Medium |
rpm |
Cooling; 1,322 Heating; 1,328 |
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High |
rpm |
Cooling; 1,418 Heating; 1,420 |
1,200 - 1,170 |
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Heat Exchanger |
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Description |
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Evaporator |
Condenser |
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Tube material |
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Copper |
Copper |
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Fin material |
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Aluminium |
Aluminium |
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Fin Type |
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Louver |
Louver |
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Row / Stage |
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(Plate fin configuration, forced draft) |
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2 × 10 |
2 × 26 |
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FPI |
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18 |
18 |
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Size (W × H × L) |
mm |
966.5 × 254 × 44 |
826 × 663.9 × 44 |
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Refrigerant Control Device |
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Capillary Tube |
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Refrigeration Oil |
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(cm3) |
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SONTEX |
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200 LT (1,242) |
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Refrigerant (R-22) |
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g (oz) |
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1,800 (63.5) |
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Thermostat |
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Electronic Control |
Electronic Control |
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Protection Device |
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Inner Protector |
Inner Protector |
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Capillary Tube |
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Length |
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mm |
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Cooling; 850, Heating; 1,200 |
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Flow Rate |
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l/min |
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Cooling; 21.8, Heating; 23 (1/2 ATM) |
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Inner Diameter |
mm |
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Cooling; 2.0, Heating; 2.4 |
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Air Filter |
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Material |
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A.B.S |
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Style |
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Honeycomb |
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Compressor Capacitor |
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µF, VAC |
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50 µF, 370VAC |
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Fan Motor Capacitor |
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µF, VAC |
2.0 µF, 450VAC |
3.0 µF, 450VAC |
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• Specifications are subject to change without notice for further improvement.
7
CS-A28BKP5/CU-A28BKP5
4 Dimensions
CS-A28BKP5/ CU-A28BKP5
8
CS-A28BKP5/CU-A28BKP5
Dimensions
CS-A28BKP5/CU-A28BKP5
5 Refrigeration Cycle Diagram
CS-A28BKP5/CU-A28BKP5
9
CS-A28BKP5/CU-A28BKP5
6 Block Diagram
CS-A28BKP5/CU-A28BKP5
10
CS-A28BKP5/CU-A28BKP5
7 Wiring Diagram
CS-A28BKP5 / CU-A28BKP5
11
CS-A28BKP5/CU-A28BKP5
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 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.
7 minutes Time Saved Control
•The compressor will start automatically if it has stopped for 7 minutes even if the room temperature is below the compressor ON temperature.
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.
12
CS-A28BKP5/CU-A28BKP5
Automatic Fan Speed Mode
When Automatic Fan Speed is selected at Remote Control during cooling operation.
•Fan speed rotates in the range of Hi to Me.
•Deodorizing Control.
Cooling Operation Time Diagram
13
CS-A28BKP5/CU-A28BKP5
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.
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.)
Automatic Fan Speed Mode
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
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.
30 minutes Time Saved Control
•The compressor will start automatically if it has stopped for 30 minutes even if the room temperature is below the compressor OFF temperature.
Overload Protection 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 Tb 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).
• 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 stay 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.
16
CS-A28BKP5/CU-A28BKP5
Automatic Fan Speed Mode
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.
Heating Operating Time Diagram
17
CS-A28BKP5/CU-A28BKP5
Deicing Control
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 outdoor piping temperature drops to -4°C for 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.
a)Normal Deicing Time Diagram
18
CS-A28BKP5/CU-A28BKP5
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 |
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Judgement |
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Next Mode |
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Mode |
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Cooling |
Soft Dry |
Heating |
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O |
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O |
Cooling |
23°C |
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Cooling |
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(Judgement: |
Not Applicable |
(Judgement: |
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Heating |
23°C & Above) |
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Below 23°C) |
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O |
O |
Soft Dry |
20°C |
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Soft Dry |
Not Applicable |
(Judgement: |
(Judgement: |
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Heating |
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20°C & Above) |
Below 20°C) |
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O |
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O |
Heating |
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Cooling |
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(Judgement: |
Not Applicable |
(Judgement: |
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25°C |
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Heating |
25°C & Above) |
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Below 25°C) |
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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”.
Operation |
Higher |
Standard |
Lower |
Mode |
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(+2°C) |
(±0°C) |
(-2°C) |
Cooling |
27°C |
25°C |
23°C |
Soft Dry |
24°C |
22°C |
20°C |
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Heating |
23°C |
21°C |
19°C |
19
CS-A28BKP5/CU-A28BKP5
8.5.Sleep Mode Auto Operation
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 8 hours.
•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.
•The setting temperature will be descented by 2°C at the start of operation and by 3°C one hour later.
•The operation will stop after 8 hours.
•When using together with the Timer, the ON-Timer has priority.
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 by cutting the jumper wire J2. (Refer Circuit Diagram)
8.7. Indoor Fan Speed Control
•Auto Fan Speed Control
When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting 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.
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Fan Speed |
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High Speed ←→ |
Low Speed |
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Manual |
O |
O |
O |
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Cooling |
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Auto |
O |
O |
O |
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O |
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Sleep |
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O |
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Soft Dry |
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Manual, Auto |
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O |
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O |
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Sleep |
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O |
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Manual |
O |
O |
O |
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Heating |
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Auto |
O |
O |
O |
O |
O |
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O |
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Sleep |
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O |
O |
O |
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Hi |
Me |
Lo |
SLo |
SSLo |
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STOP |
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8.8.Airflow Direction Control
Airflow Direction Auto-Control
•When set a Airflow Direction Auto-Control with remote control, the louver swings up and down as shown in the diagram.
•The louver does not swing when the Indoor Fan stops during operation.
•When stopped with remote control, the discharge vent is closed with the louver.
The left and right airflow direction louvers can be adjusted manually.
1 There is no swinging while indoor fan is stopped during Cooling and Soft Dry operation.
2 In Heating operation, when the indoor heat exchanger temperature rises to 38°C, the airflow direction is changed from upper limit to lower limit. When the indoor heat exchanger temperature falls to 35°C, the air flow direction is changed from lower limit to upper limit.
CS-A28BKP5/CU-A28BKP5
Airflow Direction Manual Control
•When the airflow direction set button is pressed, the automatic airflow is released and the airflow direction louver move up and down in the range shown in the diagram.
The louver can be stopped by releasing the button at the desired louver position.
•When the remote control is used to stop the operation, the discharge vent is closed with airflow direction louver.
The left and right airflow direction louvers can be adjusted manually.
8.9. |
Delay ON Timer Control |
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• |
When the Delayed ON Timer is set by using the remote control, the unit will start operate slightly before the set time, so that |
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the room will reach nearly to the set temperature by the desired time. |
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For Cooling and Soft Dry mode, the operation will start 15 minutes before the set time. |
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For Heating mode, the operation will start 30 minutes before the set time. |
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For Automatic mode, the indoor fan will operate at SLo speed for 20 seconds, 30 minutes before the set time to detect the |
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intake air temperature to determine the operation mode. The operation indication lamp will blink at this time. |
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8.10. |
Cold Draught Control |
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•When COMP = Thermal OFF, indoor fan speed immediately changed to SLo for 30 sec., followed by SSLo speed until COMP = ON.
During cold draft c/m operation, fan speed will be SSLo only.
SSLo: Fan will be running at Lo speed with SSR ON for 0.6 sec. and OFF for 5.0 sec.
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CS-A28BKP5/CU-A28BKP5
9 Operating Instructions
Safety Precautions
Before operating, please read the following “Safety Precautions” carefully.
To prevent personal injury, injury to others and property damage, the following instructions must be followed.
■Incorrect operation due to ignoring of instructions will cause harm or damage, the seriousness of which is classified as follows :
!Warning : This sign warns of death or serious injury.
!Caution : This sign warns of injury or damage to property only.
■The instructions to be followed are classified by the following symbols :
This symbol (with a white background) denotes an action that is
PROHIBITED.
OFF
These symbols (with a black background) denote an action that is COMPULSORY.
Installation precautions
!Warning
■Do not install, remove and reinstall the unit yourself.
Improper installation will cause leakage, electric shock or fire. Please consult an authorized dealer or specialist for the installation work.
!Caution
■ This room air conditioner must be |
■ Ensure that drainage piping is connected |
earthed. |
properly. |
Improper grounding could cause |
Otherwise, water will leak out. |
electric shock. |
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■Do not install the unit in a place where there may be explosive gas leaks.
Gas leaks near the unit could cause fires.
22
CS-A28BKP5/CU-A28BKP5
Operation precautions
!Warning
■Insert the power plug properly.
Heat generated by a loose power plug could cause electric shock or fire.
Electrical outlet and power plug shall be easily accessible.
■Do not modify the length of the power cord or use an extension cord.
It could cause electric shock or fire.
■Do not be directly exposed to the cold airstream for too long.
It could lead to health problems.
■Do not operate or stop the unit by inserting or pulling out the power plug.
It could cause electric shock or fire.
■Do not operate the unit with wet hands.
It could cause an electric shock.
■If there is a smell of burning, stop the air conditioner and disconnect the power supply.
The heat generated could cause electric shock or fire. Please consult an authorized dealer or service centre.
■Do not damage or use an unspecified power cord.
It will cause electrical shock or fire.
■Do not insert finger, sticks or other objects into the units.
It could lead to physical injury and cause damage to the units.
■Do not try to repair the unit yourself.
It could lead to fire or cause an electric shock. Please call an authorized dealer or service centre.
OFF
Switch off Disconnect the breaker. the power
plug.
23
CS-A28BKP5/CU-A28BKP5
!Caution
■Do not remove the power plug by pulling the cord.
Hold the plug when disconnecting the plug from the wall outlet.
■Do not use for other purposes.
Do not use for preservation purposes. It will affect food quality, animals or plants.
■Switch off the power supply if the unit is not going to be used for a long period of time.
If dust accumulates on the plug, it will generate heat and this could cause a fire.
Switch off |
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the breaker. |
OFF |
Disconnect the power plug.
■Do not place combustor in the path of the airflow from the unit.
Incomplete combustion could
cause toxic gas (CO) poisoning.
■When cleaning the unit, remove the plug.
This is to prevent injury due to the rotating fan in the unit.
OFF
■Ventilate the room regularly.
If not ventilated regularly, the lack of oxygen could cause headaches.
■Do not wash the unit with water.
■Inspect the unit for any damage.
■Do not sit or place anything on the outdoor unit.
It could cause an electric shock. |
Ensure that the necessary repairs |
You might fall off or the unit |
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are carried out. |
might collapse. |
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