Panasonic CS-A70KE User manual

Panasonic
ORDER NO. MAC9509078C2
Service Manual
Room Air Conditioners
CS-A70KE / CU-A70KE
CS-A90KE / CU-A9S0KE
CS-A120KE / CU-A120KE
Contents
@: FOATULOS iii eistivenisayedccates eakeetiiases lediarteenieatees 1
@ FUNCTIONS «2.2... cee ceccceeeeeeceeeeseeeseeeeeeeueaeanaes 2-4
e Product Specification ............cceeeee 5-10
@ DIMENSIONS .00.... eee e cece cece ccccecsseeeeeeeeeees 11-12
e Refrigeration Cycle Diagram .............: eee 13
@ Block Diagram ...........cccccccccccessssseeseeeeteeeeneeetes 14
@ WINING DIAGIEO oaccicdisssncetcoagetannetora cases 15-16
e Operation Details «0.0.0.0... cccseeeeeeeees 17-27
e Installation Information... ee 28 - 29
e 2-way, 3-way VAIVES ........ cece reer 30 - 36
e Servicing Information ............. cee eee 37-40
e Troubleshooting Guide ............cceeee 41-42
@ Technical Data sinicccionsccersaicoeatishean leas 43-46
e Exploded View .............ccecseeceeesereseereeeeeees 47,49
e Replacement Part Lists ............... eee 48, 50
e Electronic Parts Lists .............c:c.ccccceceeeeeeen 51
© 1995 Matsushita Air-Conditioning Corp. Sdn. Bhd.
All rights reserved. Unauthorized copying and distribu-
tion is a violation of law.

CS-A70KE
4. WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain
warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity
should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products deait with
in this service information by anyone else could result in serious injury or death.
4. PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigeration circuit.
Features
¢ High Efficiency ¢ Installation Work Improvement
— Longpiping upto 10 m (3/4, 1.0 HP) and 15m (1.5 HP)
e
Compact Design
* Quality Improvement
Comfort
Improvement
—
Low
voltage
protection
— Wider range of horizontal discharge air Gas leakage protection
; — Prevent compressor reverse cycle
— Longer hours of sleep mode operation
g P P 2-stage OLP to protect compressor
e Auto Restart
“ I
~ Auto restart operation after power failure Service Improvement
— Easy fan motor replacement procedure
— Front side servicing f td it
¢ Removable and Washable ront side servicing for outdoor uni
Front Panel

CS-A70KE
Functions
Remote Control
/ON@
eo" °F Operation OFF / ON | Uso | Room Temperature Setting |
* Temperature Setting (16°C to 30°C)
MODE ¢ Automatic Operation
-———
Operation
Mode
Selection
|
#
<4
2°C
lower
than
standard
* AUTO Automatic Operation Mode $ Standard
°
HEAT
Heating
Operation
Mode
&
»
&
2°C
higher
than
standard
* COOL Cooling Operation Mode
* DRY Soft Dry Operation Mode ON-TIMER
OFF-TIMER |=, ; :
| Timer Operation Selection
FAN SPEED | door Fat Speed Selection | ° 24-hour, OFF / ON Real Timer Setting.
* ® ® ®@ Low Speed
g TIME ; : FF
t————, Time / Timer Setting
* ® ® ® Medium Speed
nan ¢ Hours and minutes setting.
* @® ® ® High Speed
PT | SET
¢
AUTOFAN
Automatic
Fan
Speed
ea
Timer
Operation
Set
/
Cancel
SWING / ¢ ON Timer and OFF Timer setting and
MANA. | Airflow Direction Control | cancellation.
* SWING Automatic Airflow Direction ve
Sontio! r——| Clock Settin
¢ MANUAL Airflow Direction Manual Control 2 g
* Current time setting.
SHEET | Sleep Mode Operation OFF / ON

CS-A70KE
Functions
Indoor Unit
AUTO
TEST RUN
Power Switch OFF / ON ‘i
OFF
ane Temporary Operation Switch
¢ Used when the remote control cannot be
used.
Remote Control Signal Receiving
Sound Control
* It can be controlled by pressing Temporary
Operation Switch for 10 seconds.
OfF/ON | Operation Test Running / Pump
Down Switch
Lo |
¢ 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 or 4
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)
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 ~ 41°C.
¢ Hot Start is completed when indoor heat
exchanger reaches 41°C.
Sleep Mode Auto Control
¢ The operation starts at SLo speed and
stops after 8 hours.
—— indoor Fan Speed Control
¢ High, Medium and Low.
« Automatic Fan Speed Mode
— Heating : Fan speed varies from Me
~>SLo in accordance with
indoor heat exchanger.
— Cooling : Fan rotates at Hi and Me speed.
Deodorizing control is available.
— Soft Dry : Fan rotates at SLo speed.
Deodorizing control is available.
——s
— Airflow Direction Control
* Automatic air swing and manual adjusted
by remote control for vertical airflow.
* Manually adjusted by hand for horizontal
airflow.

CS-A70KE
Functions
Outdoor Unit
Protection Control
* Outdoor fan stops when indoor heat
exchanger temperature rises to 51°C and
restarts when the indoor heat exchanger
temperature drops to 49°C.
¢ Compressor stops when indoor heat ex-
— Overload Protector changer temp. reaches 65°C or above.
(Heating Operation only
* 2-stage OLP to protect the compressor.
Overload Protector will trip when
~ High Temperature Compressor Protection Control
~ High Current me ¢ If the outdoor fan motor is not running after
(Refer circuit diagram for OLP characteristic) compressor starts for 50 secs., compressor
will stop. (Cooling and Soft Dry Operation
| 60 Secs. Forced Operation Control only).
¢ To protect compressor from reverse
rotation when there is a instantaneous
power failure.
—a |
¢ Once the compressor is activated, it does
not stop for 60 secs. (Stops immediate with
remote control stop signal.)
4-Way Valve Control
* When the unit is switched to “OFF” during
Heating Operation, 4-way valve stays at
Heating position for 5 minutes.
Deice Control
¢ To prevent frosting at outdoor heat
exchanger. (Only for Heating Operation) Outdoor Fan Operation Control
¢ Outdoor indoor heat exchanger is sensed
e | t ;
by TRS (Thermal Reed Switch). Se a its

_ CS-A70KE
Product Specifications
Unit CS-A70KE | CU-A70KE
kw 2.05 - 2.00
Cooling Capacity Btu/n 7,000 - 6,800
‘ kW 2.15 - 2.10
Heating Capacity Btu/h 7,300 - 7,200
2/n 1.3
Moisture Removal Pint/h 27
Phase Single
Power Source V 240 - 220
Cycle 50
OUTLET SIDE VIEW TOP VIEW
Airflow
Method
a
&
‘s
INTAKE — Ref}
|
Air Volume Indoor Air (Lo) m/min (cfm) on ee neo =
indoor Air (Me) m3/min (cfm) eu 2 ea s
Indoor
Air
(Hi)
m?/min
(cfm)
oe
ts
oy
z
Outdoor Air m?/min (cfm) - 22.4 (790)
. = + Cooling ; High 36/35, Low 30/29 Cooling ; High 47/45
Noise Level dB (A) Healing ; High 36/35, Low 30/29 Heating High 49/47
Electrical Ww Cooling ; 640 - 590
Data Input Heating ; 640 - 600
; Cooling ; 3.1 - 3.0
Running Current A Heating : 3.1 - 3.0
Cooling ; 3.2 - 3.4
COP Heating ; 3.4 - 3.5
Starting Current 13
Piping Connection Port inch | G ; Half Union 3/8" G; 3-way valve 3/8"
(Flare piping) inch L ; Half Union 1/4" L ; 2-way valve 1/4"
Pipe Size inch G (gas side) ; 3/8" G (gas side) ; 3/8"
(Flare piping) inch L (liquid side) ; 1/4" L (liquid side) ; 1/4"
Drain Inner diameter mm 12 =
Hose Length | m 0.7 -
Power Cord Length 24 =
Number of core-wire mn 3 (1.0mm?) I -
Dimensions Height inch (mm) 11-7/16 (290) 18-29/32 (480)
Width inch (mm) 31-15/32 (799) 30-23/32 (780)
Depth inch (mm) 6-29/32 (175) 9-21/32 (245)
Net Weight Ib (kg) 18 (8.0) 64 (29.0)
= Rotary (1 cylinder)
COmbiessoh Type L rolling piston type
Motor Type = Induction (2-pole)
Rated Output Ww - 550
Type Cross-flow Fan Propeller Fan
Air Circulation Material AS + Glass Fiber 30% AES + Glass Fiber 12%
| Motor Type Transistor (4-pole) Induction (6-pole)
Input r Ww - 58.6
Rated Output W 20 20
Fan
|
Low
rpm
950
Si
Speed | Medium rpm 1,030 -
| High rpm 1,150 730

Product Specifications
oso W 40) 4
Unit CS-A70KE CU-A70KE
Heat Description Evaporator Condenser
Exchanger Tube material Copper | Copper
Fin material Aluminium Aluminium
Fin Type Slot Fin Corrugated Fin
Row
/
Stage
(Plate
fin
configuration,
forced
draft)
2x12 1x18
FPI 18 18
Size (W x H x L) mm 600 x 252 x 25.4 856 x 457.2 x 22
Refrigerant Control Device = Capillary Tube
es
Pin eg
~~T~SUNISO
4GDID
or
Refrigeration Oil (c.c) - ATMOS M60 (290)
Refrigeration (R-22) g (0z) z 860 (30.4)
Thermostat Electronic Control =
Protection Device = Overload Protector
Length mm - Cooling ; 920, Heating ; 590
Capillary Tube | Flow Rate e/min - Cooling ; 4.8, Heating ; 8.2
Inner Diameter mm = Cooling ; 1.1, Heating ; 1.3
Air Filter lear P.P. =
Style Honeycomb
F Gapacity Control Capillary Tube
Compressor Capacitor uF, VAC = 15 uF, 440VAC
[Fan Motor Capacitor uF, VAC iz 1.2 uF, 400VAC
¢ Specifications are subject to change without notice for further improvement.

CS-A70KE
Product Specifications
Unit CS-A90KE | CU-A9OKE
, : kW 2.65 - 2.60
Cooling
Capacity
Btu/h
9,000
-
8,900
; : kW 3.15 - 3.00
|
Heating
Capacity
Btu/h
10,700
-
10,200
. o/h 1.6
Moisture
Removal
Pint/h
34
Phase aia 3 Single a :
Power
Source
Vv
240
-
220
Cycle 50
OUTLET SIDE VIEW ba ¢
Airflow Method eat
Tan a chat}
Air Volume Indoor Air (Lo) m?/min (cfm) ite ep, Es
[7 ar
Indoor Air (Me) m®/min (cfm) eit ee oa 2
Indoor Air (Hi) m/min (cfm) aie te sad e
Outdoor Air m/min (cfm) _ 22.4 (790)
; Cooling ; High 38/38, Low 30/30 Cooling ; High 49/48
Noise, Level dB (A) Heating ; High 39/39, Low 30/30 Hoare ; High 49/47
Electrical W Cooling ; 930 - 880
Data Input Heating ; 950 - 880
: Cooling ; 4.1 - 4.1
Running Current A Heating :4.2- 4.1
Cooling ; 2.8 - 3.0
COP dad Heating ; 3.3 - 3.4
Starting Current A 20
Piping Connection Port inch G ; Half Union 3/8" G ; 3-way valve 3/8"
(Flare piping) inch L_; Half Union 1/4" L ; 2-way valve 1/4"
Pipe Size inch G (gas side) ; 3/8" G (gas side) ; 3/8"
(Flare piping) inch | L (liquid side) ; 1/4" L (liquid side) ; 1/4"
| Drain | Inner diameter mm 12 ~
|
Hose
|
Length
m
0.7
-
Power Cord Length 2.1 -
Number of core-wire a 3 (1.0mm?) =
Dimensions | Height inch (mm) 11-7/16 (290) 18-29/32 (480)
Width inch (mm) 31-15/32 (799) 30-23/32 (780)
Depth inch (mm) 6-29/32 (175) 9-21/32 (245)
Net Weight ib (kg) 18 (8.0) 71 (32.0)
a Rotary (1 cylinder
Om piesser Type falling ar ie
Motor Type = Induction (2-pole)
Rated Output Ww = 750
Type Cross-flow Fan Propeller Fan
Air Circulation Material AS + Glass Fiber 30% AES + Glass Fiber 12% |
Motor Type Transistor (4-pole) Induction (6-pole) {
Input WwW = 58.6
Rated Output WwW 20 20
Fan
Low
tpm
980
=
|
Speed | Medium rpm 1,150 7
High rpm 1,310 730

Product Specifications
CS-A70KE
+
Unit CS-A90KE CU-A90KE
Heat Description Evaporator | Condenser
Exchanger Tube material Copper _ Copper
Fin material Aluminium Aluminium
Fin Type Slot Fin Corrugated Fin
Row / Stage (Plate fin configuration, forced draft)
2x12 1x18
FPI | 18 | 19
Size (W x H x L) mm 600 x 252 x 25.4 856 x 457.2 x 22
Refrigerant Control Device _ Capillary Tube
Refrigeration Oil - SUNIEO SeDID
(c.c) ATMOS M60 (350)
Refrigeration (R-22) g (02) = 850 (30.0)
Thermostat _| Electronic Control =
Protection Device - Overload Protector
Length mm - Cooling ; 1,033 Heating ; 585
Capillary Tube | Flow Rate £/min - Cooling ; 4.8, Heating ; 9.9
Inner Diameter mm - Cooling ; 1.2, Heating ; 1.4
Air Filter Bere P.P. a
Style Honeycomb i =
Capacity Control Capillary Tube
Compressor Capacitor uF, VAC - 25 uF, 370VAC
Fan Motor Capacitor [_ pF, VAC - 1.2 uF, 400VAC
* Specifications are subject to change without notice for further improvement.

CS-A70KE
Product Specifications
Unit CS-A120KE CU-A120KE
kW 3.50 - 3.45
Cooling
Capacity
Btu/h
11,900
-
11,800
: : kw 4.10 - 4.00
Heating
Capacity
Btu/h
14,000
-
13,600
£/h 2.0
Moisture
Removal
Pint/h
4.2
Phase Single
Power
Source
Vv
240
-
220
Cycle 50
OUTLET SIDE VIEW TOP VIEW
Airflow Method —
INTAKE _
rus
Cooling ; 7.5 (260
Air Volume Indoor Air (Lo) m/min (cfm) Heating :7.8 aa 7
Indoor Air (Me) m/min (cfm) care te eee ~
dcpes aii Cooling ; 9.3 (330)
Indoor Air (Hi) m/min (cfm) Heating : 9.7 (340) -
Outdoor Air m/min (cfm) ~ 22.0 (780)
; Cooling ; High 42/41, Low 38/37 Cooling ; High 49/48
Norse eve dB (A) Heating ; High 43/42, Low 38/37 | _ Heating ; High 49/48
Electrical Ww Cooling ; 1.25 - 1.22
Data Input Heating ; 1.28 - 1.23
Running Current A He ihe =
Cooling ; 2.8 - 2.8
COP mM Heating ; 3.2 -3.3
Starting Current A 25
Piping Connection Port inch G ; Half Union 1/2" G; 3-way valve 1/2"
(Flare piping) inch L ; Half Union 1/4" L ; 2-way valve 1/4"
Pipe
Size
inch
G
(gas
side)
;
1/2"
G
(gas
side)
;
1/2"
(Flare piping) inch L (liquid side) ; 1/4" |___L (liquid side) ; 1/4"
Drain
Inner
diameter
mm
12
=
Hose
Length
m
0.7
=
Power
Cord
Length
2.1
|
=
Number
of
core-wire
-
3
(1.0mm?)
=
Dimensions Height inch (mm) 11-7/16 (290) | 18-29/32 (480)
Width inch (mm) 31-15/32 (799) 30-23/32 (780)
Depth inch (mm) 6-29/32 (175) 9-21/32 (245)
Net Weight Ib (kg) 18 (8.0) 84 (38.0)
Rotary (1 cylinder)
OMBISSSor ype 7 rolling piston type
| Motor Type = Induction (2-pole)
Rated Output WwW a 1,100
Type Cross-flow Fan Propeller Fan
Air Circulation Material AS + Glass Fiber 30% AES + Glass Fiber 12%
Motor Type Transistor (4-pole) Induction (6-pole)
Input W = 58.6
Rated Output Ww 20 20
Fan Low rom 1,210 =
Speed | Medium rpm 1,350 a
High rpm 1,500 730