Panasonic CW-C120VR User manual

OrderNo. MAC0212096C3
Room AirConditioner
CW-C120VR
2003 Matsushita Industrial Corp. Sdn. Bhd. (11969-T). All rights
reserved. Unauthorizedcopying and distribution isaviolation of
law.
1. ProductSpecifications

Unit CW-C120VR
Phase Single
Voltage V 220 ~240
Frequency Hz 50
Cooling Capacity kW
Btu/h 3.55 ~3.60 12,100 ~12,300
Running Current A 6.3 ~6.4
Input Power W 1.32k ~1.41k
EER (W/W) 2.69 ~2.55
Btu/hW 9.2 ~8.7
Starting Current A 27
CompressorOutput W 950
FanMotorOutput W 46 ~57
Noise Level Indoor/ (High / Low) dB(A) 48 / 45 ~50 / 47
Outdoor
(High / Low) dB(A) 56 / 53 ~57 / 54
PowerdB 69
Moisture Removal L/h/ Pt/h 2.1 / 4.4
AirCirculation Indoor m3/min(ft3/min) 9.8 (350)
Outdoor m3/min(ft3/min) 16.0 (565)
Dimensions Height mm / (inches) 375 / (14-25/32)
Width mm / (inches) 560 / (22-1/16)
Depth mm / (inches) 606 / (23-7/8)
NetWeight kg/ lb 38 / 84
Gross Weight kg/ lb 41 / 90
Refrigerant (R-22) g/ oz 560 / 19.8
-Specificationsaresubject tochangewithoutnotice for further
improvement.
2. Dimensions
2.1. CW-C120VR
2.1.1. Top View, FrontViewand SideView

2.2. Unit
Item Unit: Inch(mm)
A-Width 22-1/16”(560)
B -Height 14-25/32”(375)
C -Depth 23-7/8”(606)
D 11-9/16”(294)
E 1-13/16”(46)
F11-3/32”(281.6)
G 11-3/32”(281.6)
3. Refrigeration CycleDiagram

Item Pressure (MPa) Temperature (°C)
A 1.82 ~2.02 66 ~81
B 1.72 ~1.92 36 ~46
C 0.51 ~0.57 6 ~11
D 0.48 ~0.54 9 ~16
4. Wiring Diagram
4.1. Resistance ofFanMotor windingsand theratedCapacitor
Model CW-C120VR
Connection CWA921145
Blue -Yellow 84.1
Yellow-Orange 55.6
Red-Yellow 118.3
Capacitor DS441305BPQH
(3 F, 440VAC)
4.2. Resistance ofCompressor windingsand theratedCapacitor

Model CW-C120VR
Connection 2KS206D5DA04
C-R 2.293
C-S 3.245
Capacitor DS371356CPNA
(35 F, 370VAC)
Note:Resistance at20°C of Ambient Temperature.
5. AirConditioner Performance Evaluation
Intake & Discharge Air
Temperature Difference Current Drain Determination Remedy
-8°C and over(14.4°F) -Asspecified. -Nothing wrong. -None.
-8°C and over(14.4°F) -Higherthan specified. -Nothing wrong, outdoor
temperatureistoo high, heat
radiation isnot efficient.
-Improveheat radiation.
-Under8°C (14.4°F) -Higherthan specified. -Something ispreventing heat
radiation. -Excessiveamount of
refrigerant.
-Improveheat radiation.
-Under8°C (14.4°F) -Lowerthan specified. -Leakageof refrigerant or
refrigerant systemisblocked. -Locate and repairleak.
-Flushrefrigeration cycle.
-Under8°C (14.4°F) -Higherthan specifiedby50%. -Compressordefect. -Replace the compressor.
Note:Room airhumidityis relativelyhigher, the temperature difference will be smaller.
6. Troubleshooting Guide
Warning: Disconnectunitfrom electrical powersupplybefore making anyelectrical checks.
Trouble Check Result Cause
Remedy
FanMotorand
Compressorwon’t
run.
-SupplyVoltage
-Fuse BoxorCircuit
Breaker.
-PowercordorWiring
Harness.
-TemperatureSetting.
-Less than 10%by
Rated.
-OpenContacts. /
-Pulledloose orShorted. /
-Higherthan room
temperature
-Temporaryor
Permanent?
-CustomerRestarted
unitimmediatelywithout
waiting 3minutes.
-Consult
ELECTRICIAN,
ifpermanent.
-WAITFOR 3
MINUTES.
-Repair
Open
-Repairor
Replace
-Set it
LOWER.
Fanmotorwon’t
run (Compressor
run).
-Objects around Fan.
-RESISTANCEbetween
Wires.
-CapacitorFanMotor.
-MainControl Switch.
-Locked Fan.
-Shorted / Opencircuit.
-OHMMeterdoesn’t
Deflect.
-Nocontacts at
Position Shown.
-FanHitting Cowling.
-Foreign Materials.
-FrozenBearings.
-Shorted orBurnedout.
-CapacitorDefect.
-MainControl Switch
defect.
-Adjust Fan
position
setting
screw.
-Remove
Foreign
Materials.
-Replace
Fan
-Replace
Fan
-Replace
Capacitor
-Replace
Main
Switch.

Trouble Check Result Cause
Remedy
Compressorwon’t
run (Fanrun). -Temperaturesetting. -RESISTANCEbetween
Terminal and the
CompressorBody.
-RESISTANCEbetween
Terminals.
-OverloadProtector.
-CapacitorCompressor.
-Thermostat.
-MainControl Switch.
-Higherthan roomtemp.
-Shorted.
-Shorted.
-Infinitybetween
Terminals.
-OHMMeterdoesn’t
deflect.
-Noclick heard.
-Nocontacts at
Position Shown.
-Winding Coil touched to
the compressorshell.
-RearShorted orBurnt
out.
-RearShorted orBurnt
out.
-OverloadProtector
defect.
-Capacitordefect.
-Thermostat defect.
-MainControl Switch
defect.
-Set itlower.
-Replace
Compressor.
-Replace
Compressor.
-Replace
Overload
Protector.
-Replace
Capacitor
Compressor.
-Replace
Thermostat.
-Replace
Main
Switch.
AirSwing won’trun -AirSwing Switch. -OFF position. -Set itON.
-Nocontact at position. -Opencircuit -Replace Air
Swing
Switch.
-Resistance between
wires. -OHMMeterdoesn’t deflect. -Shorted oropencircuit. -Replace Air
Swing
Motor.
Insufficient cooling. -TemperatureSetting.
-Ventilation dooropen.
-Airfilterdirty.
-Location of installation.
-Evaporator/Condenser
Coil obstructed.
-Unitcapacityforthe
roomtoo small.
-Temperaturedifference
and running current.
-Higherthan room
temperature.
-Open.
-Cloggedordirty.
-Sunlight hitting outdoor
side.
-Obstacles.
-Cloggedordirty.
-Not satisfied.
-REFER TO
PERFORMANCE
EVALUATION.
-Reduces capacity.
-Restrictedair
circulation.
-RestrictedHeat
Exchanger.
-RestrictedHeat
Exchanger.
-Restrictedair
circulation.
-Leakageof refrigerant
orrefrigeration system
isblocked.
-Set itlower.
-Close
ventilation
-Cleanor
replace
Filter.
-Consider
building
AWNING.
-Remove
obstacles
reinstall unit.
-Cleanthe
coils.
-Replace the
unit
biggerone.
-Locate
repair
-Flush
refrigeration
cycle.
Noise -Source of Noise -Vibration.
-Intermittent Noise.
-Faultyinstallation.
-Fanhitting objects.
-Refrigerant tubing
touching eachother.
-Fansplashing Drain
Water.
-Reinstall
unit
Reinforce the
installation.
-Adjust Fan
position
remove
foreign
materials.
-About 1/2”
Clearance
needed.
-Remove
drain
mount a
drain
removethe
water.
-Set the
Drain
downward,
so
Drainwater
can
Waterdripping
inside room. -Unitinstallation. -DrainTray-Styrofoam
pieces blocking drain
channel.
-Tilted to insideroom.
-Clogged.
-Restrictedrun off.
-Cloggedorblocked.
-Tiltunitto
outside
slightly.
-Removethe
foreign
materials.

Trouble Check Result Cause
Remedy
FrozenEvaporator -Temperaturesetting.
-AirFilter/Evaporator.
-Temperaturedifference
and running current.
-Set too low forambient
conditions.
-CloggedorDirty.
-REFER TO
PERFORMANCE
EVALUATION
-Outdoortemperature
low (Night time).
-Restrictedair
circulation.
-Leakageof refrigerant
orrefrigeration system
isblocked.
-Set the
Main
knob to Fan
to
and set the
Temperature
Control
higher
temperature.
-CleanAir
filter/
Evaporator.
-Locate and
repair
-Flush
refrigeration
cycle.
7. Operating Instructions
7.1. Parts Identification
7.1.1. MainUnit
7.1.1.1. Vertical AirflowDirection Vane

Airflowdirection adjustment up
-down.
-Thevertical airflow direction vaneis
controlledbyrotating the horizontal vane
forwardorbackward.
7.1.1.2. Ventilation Lever
The ventilation levermustbe in
the CLOSE position inorderto
maintainthe bestcooling
conditions.
Whenfreshairis necessaryin
the room, setthe ventilation
leverto the OPEN position. The
damperis openedand room air
is drawnout.
7.1.1.3. MainControl Panel
7.1.2. Operation Conditions
Use the airconditionerunderthe following conditions:
-Operating temperaturerange.

Indoorside Outdoorside
D.B.T. W.B.T. D.B.T. W.B.T.
Maxi
Temperature 32°C 23°C 43°C 26°C
Min
Temperature 21°C 15°C 21°C 15°C
D.B.T.:DryBulbTemperature
W.B.T.:Wet BulbTemperature
NOTE:Humiditymayexceed90%.
-Continuousoperation at over90%high humiditymaycreate
condensation and resultinwaterdropson theintake and outlet
vanes.
7.2. Howtooperate Fig. 1
1. Openthecontrol panel cover.
Fig. 2

2. PowerSupply
Switchoff thebreakerand set themaincontrol knob totheOFF
position beforeplugging thepowerplug intoanelectrical outlet.
Fig. 3
3. MainControl Knob
Set toLOWCOOLor HIGHCOOLas desired. (FANsetting
operates thefanonly.)
Caution:Ifthemaincontrol knob isturnedoff or changedtoafan
setting from acooling operation setting, WAITat lease 3minutes
beforeresetting tocooling operation.