Panasonic Cs A9dkh Cu A9dkh Cs A12dkh Cu A12dkh Repair Manual

							Fig. 4
 − To remove the electronic controller.
 − Release CN-FM connectors. (Fig. 4)
 − Release CN-Sonic connector. (Fig. 4)
 − Release CN-FB connector. (Fig. 4)
 − Release CN-ION connector. (Fig. 4)
 − Release CN-TH connector. (Fig. 4)
 − Release CN-STM connector. (Fig. 4)
 − Release CN-REC/DISP connector. (Fig. 4)
 • Remove Control Board Cover
Fig. 6
 − Remove the screw on the left of the unit. (Fig. 6)
 − Pull the hook to the left and lift up the evaporator.
(Fig. 6)
 − Pull down the Discharge Grille Complete. (Fig. 6)
Fig. 5
 − Press the hook to the right then take out the PCB. (Fig.
5)
 − ReleaseRy-Pwrconnector (black and brown) and Ac-
Wht connector from the PCB. (Fig. 5)
Fig. 7
Fig. 8
 − Remove indoor pipe sensor and air intake sensor from
the evaporator. (Fig. 7)
 − Remove the earth wire from the evaporator. (Fig. 7)
12.3. Indoor Fan Motor And Cross Flow Fan Removal Procedures
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							 − Release the generator complete wire (green and red).
(Fig. 8)
 − Remove 2 screws on the right and 1 screw at the left
side of the control board. (Fig. 7)
 − Press down the hook on the left side of control board.
(Fig. 7)
 − Then pull out the Control Board Complete from the unit.
(Fig. 7)
Fig. 9
 − Remove the cross flowfan bushing from the chassis.
(Fig. 9)
 − Loosen the fan boss screw at the cross flow fan. (Fig. 9)
Fig. 10
 − Push up the evaporator andremove crossflow fan by
pulling both cross flow fan and fan motor. (Fig. 10)
12.4. Auto OFF/ON Button
 • The “Auto OFF/ON Button” (behind the front grille) is used to operate the air conditioner if remote control is misplaced or
mulfunctioning.
 • Forced cooling operation is possible by pressing the “Auto OFF/ON Button” for more than 5s where “beep” sound is heard then
release the button.
 • User able to select remote control transmission code and toggle remote control signal receiving sound under various setting
mode.
 • To enter various setting mode:
 − Press the “Auto OFF/ON Button” continuously for 5s (“beep” sound is heard) and release.
 − Within 20s, press the “Auto OFF/ON Button” continuously for 5s again (2 “beep” sound is heard) and release.
 − Various setting mode has limit up to 20s. Then return to normal operation.
12.4.1. Toggle Remote Control Signal Receiving Sound
 • Under various setting mode, press the “Auto OFF/ON Button” to toggle the remote control sound.
 − Short “beep”: Turn ON remote control signal receiving sound.
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							 • When the batteries are inserted for the first time or the
batteries are replaced, you may notice the indications at
remote control’s display screen blink continuously and not
functionable. If this condition happens, try to reset the
remote control by pushing the reset terminal with a pointing
device.
 • You may also do the reset to erase the setting at remote
control and restore back the default setting.
 − Long “beep”: Turn OFF remote control signal receiving sound.
 • After “Auto OFF/ON Button” is pressed, the 20s counter for various setting mode is restarted.
12.4.2. Select Remote Control Transmission Code
 • There are 4 types of remote control transmission code could beselected and stored in EEPROM of indoor unit. The indoor unit
will only operatewhen received signal with same transmission code from remotecontrol. This could prevent signal interference
when there are 2 or more indoor unit installed nearby together.
 • To change remote control transmission code, short or open jumpers at the remote control printed circuit board.
 • Under various setting mode, after select the transmission code combination of remote control, press any button of remote
control to transmit a signal to indoor unit. The transmission code will be stored in EEPROM.
 • After signal is received, the various setting mode is cancelled and return to normal operation.
12.5. Remote Control Reset
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							In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.
13 Troubleshooting Guide
13.1. Refrigeration Cycle System
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							13.2. Relationship Between The Condition Of The Air Conditioner And
Pressure And Electric Current
Cooling ModeHeating Mode
Condition of the air
conditonerLow PressureHigh PressureElectric current
during operationLow PressureHigh PressureElectric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation
deficiency of the
outdoor unit
Inefficient compression
 • Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
13.3. Diagnosis Methods Of A Malfunction Of A Compressor And 4-way
Valve
Nature of faultSymptom
 • Electric current during operation becomes approximately 20% lower than the normal value.
Insufficient compressing of a compressor • The discharge tube of the compressor becomes abnormallyhot (normally 70 to 90°C).
 • The difference between high pressure and low pressure becomes almost zero.
 • Electric current reaches a high level abnormally, and the value exceeds the limit of an
ammeter. In some cases, a breaker turns off.
Locked compressor
 • The compressor is a humming sound.
 • Electric current during operation becomes approximately 80% lower than the normal value.
Insufficient switchesof the4-way valve
 • The temperature different between from the discharge tube to the 4-way valve and from
suction tube to the4-way valve becomes almost zero.
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							14 Technical Data
14.1. Thermostat Characteristics
14.1.1. CS-A9DKH CS-A12DKH
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							14.2. Operation Characteristics
14.2.1. CS-A9DKH CU-A9DKH
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							14.2.2. CS-A12DKH CU-A12DKH
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							15 Exploded View (Indoor Unit)
15.1. CS-A9DKH CS-A12DKH
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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							16 Replacement Parts List (Indoor Unit)

REF. NO.PART NAME & DESCRIPTIONQTY.CS-A9DKHCS-A12DKHREMARKS1CHASSY COMPLETE1CWD50C1377←2FAN MOTOR1CWA921181←03CROSS FLOW FAN COMPLETE1CWH02C1031←4BEARING ASS’Y1CWH64K007←5SCREW - CROSS FLOW FAN1CWH4580304←6EVAPORATOR1CWB30C1687CWB30C16017FLARE NUT1CWT25078(1/4”)←8FLARE NUT1CWT25005 (3/8”)CWT25007 (1/2”)9INTAKE AIR SENSOR HOLDER1CWH32143←10DISCHARGE GRILLE COMPLETE1CWE20C2316←11VERTICAL VANE9CWE241150←12CONNECTING BAR1CWE261066←13CONNECTING BAR1CWE261070←14AIR SWING MOTOR1CWA98260←015LEAD WIRE - AIR SWING MOTOR1CWA67C3977←16CAP - DRAIN TRAY1CWH521096←17HORIZONTAL VANE1CWE241158←18BACK COVER CHASSIS1CWD932454←19CONTROL BOARD CASING1CWH102259←20TERMINAL BOARD COMPLETE1CWA28C2074CWA28C2071021POWER SUPPLY CORD1CWA20C2158←22ELECTRONIC CONTROLLER - MAIN1CWA743508CWA743558023SENSOR COMPLETE1CWA50C2122←024CONTROL BOARD FRONT COVER1CWH131207←25INDICATOR COMPLETE1CWE39C1115←026INDICATOR HOLDER1CWD932429←27INDICATOR HOLDER1CWD932430←28CONTROL BOARD TOP COVER1CWH13C1120←29REMOTE CONTROL COMPLETE1CWA75C2604←030FRONT GRILLE COMPLETE1CWE11C3077←31INTAKE GRILLE COMPLETE1CWE22C1154←32GRILLE DOOR1CWE141073←33AIR FILTER2CWD001144←34SCREW - FRONT GRILLE2XTN4+16C←35CAP - FRONT GRILLE2CWH521109←36DRAIN HOSE1CWH851063←37INSTALLATION PLATE1CWH361067←38BAG COMPLETE - INSTALLATION SCREW1CWH82C067←39FULCRUM1CWH621046←40ELECTRONIC CONTROLLER - IONIZER1CWA743675←041CASING - IONIZER1CWD932464←42CASING - IONIZER1CWD932431←43ION GENERATOR1CWH94C0001←44SUPERSONIC AIR PURIFYING DEVICE1CWH91C1013←45ELECTRONIC CONTROLLER - SUPERSONIC1CWA743874←046SUPER ALLERU BUSTER FILTER1CWD00C1133←47FRAME FR AIR FILTER SUPERSONIC1CWD011026←48FRAME FR AIR FILTER SUPERSONIC1CWD011027←
(Note)
 • All parts are supplied from PHAAM, Malaysia (Vendor Code: 061).
 • “O” marked parts are recommended to be kept in stock.
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