Panasonic Cw Xc70ja Cw Xc90ja Repair Manual

							 4. Slide the chassis back into the cabinet. Reinstall the cabinet
to the chassis by using screws.
11.8. Noise Consideration
 • Select an installation location that can support the weight of
the air conditioner and one that will not cause increased
operating noise and vibration.
 • Ensure that airflow and noise from the rear side of the unit
(outdoor) when installed do not disturb neighboring
residents. • Obstacles placed in front of the air outlet on the rear side of
the unit (outdoor), or coversplaced over it will cause
excessive noise and deterioration in performance.11.9. Transferring
 • Repositioning or transfer of the air conditioner due to
renovation or moving requires an additional service charge.
Please consult your dealer before moving.
12 Care and Maintenance
Caution:
Always turn off the air conditioner and the main power supply before unplugging the power cord to clean the unit.
Switch off the power supply if the unit is not going to be used for a long period of time.
 • Clean the cabinet, front grille with a mild soap or detergent and lukewarm water.
 • The front intake grille can beeasily removed forcleaning purposes (referRemoval of Front Grilleprocedures).Gently wash
it with water and a sponge.
 • The filter can be easily cleaned using a vacuum cleaner. Vacuum the front of the filter and then wash the rear with water. If it
is badly soiled, wash with a mild household detergent.
 • Do not clean with benzene, thinner, scouringpowder or cloth soaked in caustic chemicals.
 • If the unit is extremely dirty, heat transferis less efficient and the unit maynot cool effectively. Contact Shun Hing Electric
Service Centre Ltd. for an annual check.(Annual check is notcovered underwarranty)
 • If the air filter becomes clogged with dust, the cooling capacity will drop, and 6% of the electricity used to operate the air
conditioner will be wasted.
NOTE
Do not dry the front panel or the air filter in direct sunlight. (Exposure to direct sunlight may discolour or deform the panel.)
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							 1. Remove the screws in front and both sides of the chassis
as indicated (1), (2) and (3).
 2. Release the tabs at both sides of the front grille (push in the
cabinet and pull out the grille).Then, pull up the grille as to
release another two tabs at the top side of the grille.
 3. Release the temperature sensor from its holder (1) and pull
out the wire from the bushing at the cabinet (2).
 4. Pull out the unit from cabinet by holding the hand grip at the
base pan. Remove two screws in front of the control board
(1) & (2). Then, remove screw at the side of control board
(3) and take out the control board side plate.
 5. Hold the horizontal vane and pull it out from the top side
and get it out from its position.
 6. Then, remove the shaft at the bottom of the compartment.
13 Servicing Information
13.1. Control Board Removal Procedure
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							 7. Pull out the control board as shown in figure. Then remove
the screw as indicated (1).
 8. Release a hook as shown in figure (1) to open up the
control board.
 • Control Board part location.
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							14.2.1. CW-XC70JA
 • Cooling Characteristics Vs. Outdoor Temperature.
14.2.2. CW-XC90JA
 • Cooling Characteristics Vs. Outdoor Temperature.
14 Technical Data
14.1. Thermostat Characteristics
14.1.1. CW-XC70JA & CW-XC90JA
 • Mechanical Thermostat (Cooling).
14.2. Operation Characteristics
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							15 Electronic Circuit / Main
16 Electronic Circuit / Indicator Complete
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							17 Electronic Circuit Diagram
17.1. Electronic Circuit Diagram (Main Unit)
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							Before using the circuit diagram, read the following carefully.
Intake air
temperatureTemperature
settingDischarge air
temperaturePipe
temperature
Cooling27°C16°C17°C15°C
 • Indications for resistance
 − a. K...KΩ
b. W...WATT
c. M...MΩ
d. Not indicated...1/4W
 − Type
Not indicatedCarbon resistor
Tolerance (+-) 5%
Metal oxide resistor
Tolerance (+-) 1%
 • Indications for capacitor
Unit − µ...µF
 − P...pF
Type − Not indicated...ceramic capacitor
 − (S)...S series aluminium electrolytic capacitor
 − (Z)...Z series aluminiumelectrolytic capacitor
 − (SU)...SU series aluminium electrolytic capacitor
 − (K)...K series aluminium electrolytic capacitor
 − (P)...P seriespolyester system
 − (SXE)...SXE series aluminium electrolytic capacitor
 − (SRA)...SRA series aluminium electrolytic capacitor
 − (KME)...KME series aluminium electrolytic capacitor
 • Diode without indication...MA165
 • Circuit Diagram is subject to change without notice for
further development.
17.2. Electronic Circuit Diagram (Remote Control)
17.3. How to use electronic circuit diagram
 • Voltage measurement
Voltage has been measured with a digital tester when the fan is set at high fan speed under the following conditions without
setting the timer.
Use them for servicing.
Voltage indication is in red.
17.4. Timer Table
NameTimeTest Mode (Shortened CN-TEST pin)Remarks
Hour Timer1 hr.
10 min.
1 min.1 min.
10 sec.
1 sec.
Time delay SafetyControl2 min. 58 sec.0 sec.
Forced Operation60 sec.0 sec.
Time Save Control7 min.42 sec.
Freeze Prevention Control3 min.0 sec.
Compressor Reverse Rotation Detection2 min.0 sec.
Starting Current Control1.6 sec.0 sec.
Powerful Operation15 min.15 sec.
Random Auto Restart Control0 ~ 62 sec.0 ~ 6.2 sec.Add value to TimeDelay Safety Control.
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							18 Exploded View
(Note)
 • The above exploded view is for the purpose of parts disassembly and replacement.
 • The non-numbered parts are not kept as standard service parts.
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							19 Replacement Part List
Ref. No.Part Name & DescriptionQty.CW-XC70JACW-XC90JARemarks100Base Pan Assembly1CWD52K1058AL