Panasonic Cs A7gkd Cs A9gkd Cs A12gkd Series Repair Manual

51 c. Indoor Fan Control
• During any operation mode combines with Patrol operation, fan speed follows respective operation mode.
• During Patrol individual operation if e-ion starts, only Auto Fan Speed and no Powerful operation is allowed. Even if “Fan
Speed” button is pressed, no signal is sent to air conditioner, and no change on LCD display.
• During Patrol individual operation if e-ion stops, Indoor Fan stop operation.
d. Airflow direction (Horizontal, Vertical) Control
• During any operation mode...

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12.16. e-ion Operation
1. Purpose
This operation provides clean air by producing negative ions to attract dust captured at the positively charged e-ion filters.
2. Control Condition
a. e-ion operation start condition
• During unit running at any operation mode, if “e-ion” button is pressed, combination operation (operation mode + e-ion
operation) starts.
• During unit is OFF, if “e-ion” button is pressed, e-ion individual operation starts.
b. e-ion operation stop condition
• When “OFF/ON” button is...

53 3. Control Content
a. Indoor fan control
• During any operation mode combines with e-ion operation, fan speed follows respective operation mode.
• During e-ion individual operation - only Auto Fan Speed and no Powerful operation is allowed. Even if Fan Speed button
is pressed, no signal is sent to air conditioner, and no change on LCD display.
Auto Fan Speed for e-ion operation switches between HLo and CLo at pattern below:
b. Airflow direction control
• During any operation mode combines with e-ion...

54 g. Error Detection Control
When e-ion indicator blink, it indicates error listed below:
a. e-ion AIR PURIFYING SYSTEM main connector to PCB is open:
Judgment Method
• During e-ion operation (include during Patrol operation), e-ion AIR PURIFYING SYSTEM main connector to PCB is
opened.
Troubleshooting Methods
• Connect the connector or stop operation (include during Patrol operation) to cancel the blinking.
b. Abnormal Discharge
Judgment Method
• During e-ion operation, when feedback voltage is-Lo (at...

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13 Servicing Mode
13.1. Auto OFF/ON Button
1. AUTO OPERATION MODE
The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be use to
operate air conditioner with limited function if remote control is misplaced or malfunction.
2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)
The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds. A “beep”
sound will occur at the fifth seconds, in order...

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13.3. Remote Control Button
13.3.1. SET BUTTON
• To check current remote control transmission code.
- Press for more than 10 seconds.
• To change the air quality sensor sensitivity:
- Press and release with pointer.
- Press the Timer Decrement button to select sensitivity:
1. Low Sensitivity
2. Standard (Default)
3. Hi Sensitivity
- Confirm setting by pressing Timer Set button, a “Beep” sound will be heard. LCD returns to original display after 2 seconds.
- LCD returns to original display if remote...

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14 Troubleshooting Guide
14.1. Refrigeration cycle system
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. 

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14.1.1. Relationship Between The Condition of The Air Conditioner and Pressure and
Electric Current
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started. 
14.1.2. Diagnosis Methods Of A Malfunction Of A Compressor And 4-way Valve
Cooling Mode Heating Mode
Condition of the air
conditioner
Low Pressure High Pressure Electric current 
during operationLow Pressure High Pressure Electric current 
during operation
Insufficient refrigerant...

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15 Disassembly and Assembly Instructions
15.1. Indoor Electronic Controllers and Control Board Removal Procedures
WARNING
• Cautions! When handling electronic controller, be careful of electrostatic discharge.
• Be sure to return the wiring to its original position.
• There are many high voltage components within the heat sink cover so never touch the interior during operation. Wait at least two minutes after
power has been turned off. 

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