Panasonic CS-VG120KE User manual

©1999 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
CS-VG120KE
CU-VG120KE
Room Air Conditioners
Order number RAC9911057C2

1 Features 2
2 Functions 3
2.1. REMOTE CONTROL 3
2.2. INDOOR UNIT 4
2.3. OUTDOOR UNIT 6
3 Product Specifications 7
4 Dimensions 9
4.1. CS-VG120KE (INDOOR UNIT) 9
4.2. CU-VG120KE (OUTDOOR UNIT) 10
5 Refrigeration Cycle Diagram 11
6 Block Diagram 12
7 Wiring Diagram 13
8 Operation Details (FUNCTIONS) 14
8.1. TEMPERATURE SHIFT 14
8.2. COOLING OPERATION 15
8.3. SOFT DRY OPERATION 17
8.4. HEATING OPERATION 18
8.5. FAN OPERATION 22
8.6. AUTOMATIC OPERATION 22
8.7. INDOOR FAN SPEED CONTROL 24
8.8. OUTDOOR FAN CONTROL 27
8.9. AIRFLOW DIRECTION 27
8.10. QUIET OPERATION 28
8.11. POWERFUL MODE OPERATION 28
8.12. SLEEP MODE OPERATION 29
8.13. DELAY ON TIMER CONTROL 30
8.14. AUTO RESTART CONTROL 30
8.15. POWER MONITOR DISPLAY 31
8.16. REMOTE CONTROL SIGNAL RECEIVING SOUND
ON/OFF 31
8.17. INDOOR POWER RELAY CONTROL 31
9 Operation Details (PROTECTION) 32
9.1. PROTECTION CONTROL FOR ALL OPERATIONS 32
∙ Product
− − −
− Powerful Mode for quick cool/heat
− − −
− Compressor operating frequency control to maintain
desired room temperature
− − −
− Automatic Restart after power failure
− − −
− Battery weak indication mark at remote control
− − −
− Washable front panel
− − −
− Power Monitor Display
∙ Serviceability
− − −
− Self diagnosis
− − −
− Test Run at both Cooling and Heating rated frequency
∙ Quality Improvement
− − −
− High power supply voltage protection
− − −
− Low power supply voltage protection
9.2. PROTECTION CONTROL FOR COOLING & SOFT DRY
34
9.3. PROTECTION CONTROL FOR HEATING OPERATION
36
10 Installation And Servicing Air Conditioner Using R410A 37
10.1. OUTLINE 37
10.2. TOOLS FOR INSTALLING/SERVICING REFRIGERANT
PIPING 38
10.3. REFRIGERANT PIPING WORK 42
10.4. INSTALLATION, TRANSFERRING SERVICING 44
11 Installation Information 48
11.1. ATTACHED ACCESSORIES 48
11.2. SELECT THE BEST LOCATION 48
11.3. INDOOR/OUTDOOR UNIT INSTALLATION DIAGRAM 49
12 Servicing Information 50
12.1. TROUBLESHOOTING 50
12.2. SELF DIAGNOSIS DISPLAY 53
12.3. REMOTE CONTROL 55
12.4. DISASSEMBLY OF PARTS 56
13 Technical Data 62
13.1. OPERATION CHARACTERISTICS 62
14 Electronic Circuit Diagram 63
14.1. HOW TO USE ELECTRONIC CIRCUIT DIAGRAM 63
14.2. TIMER TABLE 64
14.3. CS-VG120KE ( INDOOR UNIT ) 65
14.4. CU-VG120KE ( OUTDOOR UNIT ) 67
15 Printed Circuit Board 69
15.1. CS-VG120KE ( INDOOR UNIT ) 69
15.2. CU-VG120KE ( OUTDOOR UNIT ) 71
16 Exploded View & Replacement Parts List 73
16.1. CS-VG120KE 73
16.2. CU-VG120KE 75
17 Electronic Parts List 77
− − −
− Gas leakage detection
CONTENTS
Page Page
1 Features
2
CS-VG120KE / CU-VG120KE

2 Functions
2.1. REMOTE CONTROL
3
CS-VG120KE / CU-VG120KE

2.2. INDOOR UNIT
4
CS-VG120KE / CU-VG120KE

5
CS-VG120KE / CU-VG120KE

2.3. OUTDOOR UNIT
6
CS-VG120KE / CU-VG120KE

3 Product Specifications
Unit CS-VG120KE CU-VG120KE
Cooling Capacity kW
Btu/h
3.45(0.90 3.85)
11,800 (3,100 13,100)
Heating Capacity kW
Btu/h
4.8 (0.78 6.30)
14,300 (2,700 20,500)
Moisture Removal /h
Pint/h
2.0
4.2
Power Source Phase
V
Cycle
Single
230
50
Airflow Method
Air Volume Indoor Air(Lo) m / min(cfm) Cooling ; 7.4(261)
Heating ; 7.6(268)
-
Indoor Air(Me) m / min(cfm) Cooling ; 8.1(286)
Heating ; 8.3(293)
-
Indoor Air(Hi) m/ min(cfm) Cooling ; 9.3(328)
Heating ; 9.8(346)
-
Outdoor Air m / min(cfm) -Hi; 24.5(865) Low; 21.5(759)
Noise Level dB(A) Cooling ; High 41,Low 37
heating ; High 41,Low 37
Cooling ; 48
Heating ; 51
Electrical
Data
Input kW Cooling ; 1.91(0.27 1.46)
Heating ; 1.6(0.25 2.00)
Running Current ACooling ; 5.4 (max.6.9)
Heating ; 7.0 (max.9.0)
COP Cooling ; 2.9
Heating ; 3.0
Starting Current A 5.9
Piping Connection Port
(Flare piping)
inch
inch
G ; Half Union 1/2”
L ; Half Union 1/4”
G ; 3-Way valve 1/2”
L ; 2-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 m 0.7 -
Power Cord length
Number of core-wire
2.1 m
3 core wires x 1.5mm
-
-
Dimensions Height inch(mm) 11 - 7/16(290) 25 - 25/32(655)
Width inch(mm) 31 - 15/32(799) 21 - 1/4(540)
Depth inch(mm) 6 - 29/32(175) 9 - 23/32(247)
Net Weight lb(kg) 18(8.0) 90(41)
Compressor Type - Scroll
(1 cylinder)
Motor Type -Brushless(4-poles)
Rated Output W - 650
Air Circulation Type Cross-flow Fan Propeller Fan
Material AS+Glass Fiber 30 AES+Giass Fiber 12
Motor Type Transiator(4-poles) Induction(4-poles)
Input W - 71
rated Output W 20 30
Fan
Speed
Low rpm 1,200 1,025
Medium rpm 1,310 -
High(heating) rpm 1,500(1,550) 1,165
Heat
Exchange
description Evaporator Condenser
Tube material Copper Copper
Fine material Aluminium Aluminium
Fine type Slit Fin Corrugated Fin
Row/Stage (Plate fin configuration,forced draft)
2/12 2/24
FPI 21 17
Size(W x H x L) mm 600 x 252 x 25.4 673 x 504 x 18.2
615 x 504 x 18.2
Refrigerant Control Device - Expansion Valve
refrigeration Oil (c.c) - RB88A(290)
Refrigerant(R410A) g(oz) - 850(30)
Thermostat Electronic Control -
Protection Device Electronic Control
7
CS-VG120KE / CU-VG120KE

Unit CS-VG120KE CU-VG120KE
Air Filter Material
style
P.P
Honeycomb
-
Capacity Control Expansion valve
Fan motor Capacitor µF,VAC - 1.8µF,400VAC
∙ Specifications are subject to change without notice for further improvement.
8
CS-VG120KE / CU-VG120KE

4 Dimensions
4.1. CS-VG120KE (INDOOR UNIT)
9
CS-VG120KE / CU-VG120KE

4.2. CU-VG120KE (OUTDOOR UNIT)
10
CS-VG120KE / CU-VG120KE

5 Refrigeration Cycle Diagram
INDOOR
COOLING
HEATING
4-WAY VALVE
OUTDOOR AIR
TEMP.
SENSOR
COMPRESSOR
TEMP.
SENSOR
HEAT EXCHANGER
(EVAPORATOR) HEAT EXCHANGER
(CONDENSER)
2-WAY
VALVE
3-WAY
VALVE
INTAKE AIR
TEMP.
SENSOR HEAT
EXCHANGER
TEMP.
SENSOR
HEAT
EXCHANGER
TEMP.
SENSOR
EXPANSION VALVE
DRYER
C1,C2; CAPILARRY TUBE
COMPRESSOR
DISCHARGE TEMP. SENSOR
OUTDOOR
C1
C2
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CS-VG120KE / CU-VG120KE

6 Block Diagram
CS-VG120KE / CU-VG120KE
12

7 Wiring Diagram
Remarks:
B
BR
BL
W
R
O
P
Y
Y/G
GR
: BLUE
: BROWN
: BLACK
:WHITE
: RED
: ORANGE
: PINK
:YELLOW
:YELLOW / GREEN
: GRAY
CONNECTION CWA92269(Ω)
YELLOW - BLUE
YELLOW - BROWN
YELLOW - RED
227.6
68.2
341.5
Resistance of Outdoor Fan Motor Windings.
Resistance of Compressor Windings.
CONNECTION (Ω)
U-V
U-W
V-W
1.0
1.0
1.0
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CS-VG120KE / CU-VG120KE

8 Operation Details (FUNCTIONS)
8.1. TEMPERATURE SHIFT
Once the operation starts, the remote control setting temperature will be shifted internally based on the setting fan speed and
outdoor air temperature. In addition, if Sleep Mode or Powerful Mode are set, the temperature shift will be carried out.
Setting of internal Setting Temperature
The internal setting temperature can be decided as follows:
8.1.1. Table a
Setting Temperature Shift based on outdoor air temperature.
1. Cooling, Soft Dry 2. Heating
8.1.2. Table b
Setting Temperature Shift based on fan speed.
Remote control setting fan speed Cooling Dry Heating
Lo +2.0°C +2.5°C +1.0°C
Me-, Me, Me+, Auto fan speed +2.0°C +1.0°C
Hi +2.0°C +0.5°C
8.1.3. Table c
Powerful Mode Shift
Cooling Dry Heating
Powerful -4.0°C -3.0°C +6.0°C
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CS-VG120KE / CU-VG120KE

8.2. COOLING OPERATION
8.2.1. Room Temperature Control
1. When the remote control setting temperature is less than 24°C.
2. When the remote control setting temperature is 24°C and above.
∙ Compressor OFF temperature = Compressor ON temperature.
∙ The operation frequency can be changed every 30 seconds.
∙ 30 minutes from the start of the operation, the compressor is operating at Fc max Hz.
∙ The compressor stops when the intake air temperature reaches 1°C below internal setting temperature and continues for 3
minutes.
∙ When the compressor stops, it will not begin operation for 3 minutes. (Time Delay Safety Control)
∙ When the intake air temperature reaches the Compressor ON temperature, the Compressor starts operation.
∙ When the compressor stops, the outdoor fan motor stops 30 seconds later.
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CS-VG120KE / CU-VG120KE

8.2.2. Deodorizing Control
∙ This control is available during automatic fan speed for Cooling and Soft Dry Operation. It is not available during anti-freezing
control.
∙ When the compressor is in operation, the deodorizing status starts from 1 →2→3.
∙ When the compressor stops operation, the deodorizing status starts from 4 →5→6→7.
∙ If the compressor still stops operation after 3 minutes, the deodorizing status will start from 6.
8.2.3. Sensible Heat Control
∙ This control is to improve the feeling in high fan speed during low operation frequency. When the operation frequency is less
than 37Hz, the fan speed will reduce. When the operation frequency is above 38Hz continuously for 5 minutes, the fan speed
will resume to normal condition.
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CS-VG120KE / CU-VG120KE

8.3. SOFT DRY OPERATION
8.3.1. Room Temperature Control
At the start of operation, cooling operation is running until the intake air temperature is 0.5°C higher than internal setting
temperature, then the operation will shift to Soft Dry with indoor fan speed SLo.
∙ Compressor OFF temperature = Compressor ON temperature.
∙ The operation frequency changes every 30 seconds.
∙ 30 minutes from the start of the operation, the compressor is operating at Fc max Hz.
∙ The Compressor stops when the intake air temperature reaches 1°C below internal setting temperature and continues for 3
minutes.
∙ When the Compressor stops, it will not begin operation for 3 minutes. (Time Delay Safety Control)
∙ When the intake air temperature reaches the Compressor ON temperature, the Compressor starts operation immediately.
∙ When the Compressor stops, the outdoor fan motor stops 30 seconds later.
8.3.2. Deodorizing Control
∙ This control is available during automatic fan speed for Cooling and Soft Dry Operation. It is not available during anti-freezing
control.
∙ When the compressor is in operation, the deodorizing status starts from 1 →2→3.
∙ When the compressor stops operation, the deodorizing status starts from 4 →5→6→7.
∙ If the compressor still stops operation after 3 minutes, the deodorizing status will start from 6.
8.3.3. Sensible Heat Control
∙ This control is to improve the feeling in high fan speed and low operation frequency. When the operation frequency is less than
37Hz, the fan speed will reduce. When the operation frequency is above 38Hz continuously for 5 minutes, the fan speed will
resume to normal condition. (During Cooling operation).
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CS-VG120KE / CU-VG120KE

8.4. HEATING OPERATION
8.4.1. Room Temperature Control
∙ During heating operation, the room temperature control depends on intake air temperature and internal setting temperature.
Basically it can be divided into 2 periods as shown below:
1. When indoor fan speed is Medium or above.
2. When indoor fan speed is lower than Medium.
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CS-VG120KE / CU-VG120KE

∙ Compressor OFF temperature = compressor ON temperature.
∙ The operation frequency changes every 30 seconds.
∙ When the difference of the intake air temperature and Internal setting temperature is -1.5°C or more, compressor will operate
at Fh continuously for 3 minutes and then change over to Fhmax.
∙ The compressor stops when the intake air temperature reaches 1.5°C above internal setting temperature and continues for 3
minutes.
∙ When the compressor stops, it will not start operation for 3 minutes. (Time Delay Safety Control)
∙ When the intake air temperature decreases to the compressor ON temperature, the compressor starts immediately.
∙ When the compressor stops, the outdoor fan motor stops 30 seconds later.
8.4.2. Anti Cold Draft Control
1. Indoor Fan Control
Indoor fan speed and airflow direction varies in accordance to the indoor heat exchanger temperature as shown below:
a. Manual Fan speed control
b. Auto Fan speed control
Note:
∙ UP means fan speed is increased by 1 rank.
∙ DOWN means fan speed is decreased by 1 rank.
∙ Max means fan speed is running at maximum auto fan speed.
∙ Temperature in ( ) is indicating when powerful mode is selected.
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CS-VG120KE / CU-VG120KE

2. Hot Start
∙ At the start of heating operation, the indoor fan stops and compressor operates at Fhmax frequency (124Hz). This is to heat
up the indoor heat exchanger in order to avoid cold air discharged.
∙ Hot Start ends when
a. Indoor heat exchanger temperature reaches over 15°C
or
b. 4 minutes after heating operation starts
∙ After Hot Start operation, compressor operates at Fhmax (124Hz) for 2 minutes.
8.4.3. Deice Operation
Deice operation occurs when the deice operation starting signal is generated. This happens when one of the following conditions
occurs. However, the first deice operation will begin 1 hour after start of heating operation.
Outdoor Heat Exchanger
Temp. Th 3
Outdoor Heat Exchanger
Temp. (Th)
Outdoor Temp. (To)
Case 1 120 minutes
continuously
Th -6 for 3 min
continuously
To -1
Case 2 80 minutes
continuously
Th -7 for 3 min
continuously
To -1
Case 3 40 minutes
continuously
Th -9 for 3 min
continuously
To -3
Case 4 40 minutes
continuously
Th -11 for 3 min
continuously
To -3
Note:
The above 4 cases are under compressor operating condition.
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CS-VG120KE / CU-VG120KE