Mild Dry Cooling Operation - Panasonic CS-S9MKQ Service Manual

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Error Detection Control
When e-ion indicator blink, it indicates error listed below:
Active e-ion Air Purifying system PCB main connector open:
o
Judgment Method
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During e-ion operation (include during Patrol operation), Active e-ion Air Purifying system main
connector to PCB is opened.
Troubleshooting Methods
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Connect the connector or stop operation (include during Patrol operation) to cancel the blinking.
Abnormal Discharge error:
o
Judgment Method
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During e-ion operation, feedback voltage is-Lo (at microcontroller) is detected, it is judged abnormal
discharge and stops power supplies to the Active e-ion Air Purifying system.
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Abnormal discharge is caused by ionizer or filter's high voltage power supply short-circuits due to
water or dust adhesion, and so forth.
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When abnormal discharge occurred, every 30 minutes the unit supplies power to the Active e-ion Air
Purifying system.
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When abnormal discharge occurs for 24 times continuously, e-ion indicator blinks (not applicable for
e-ion Check Mode, where the error will shows immediately despite the 24 times counter)
Troubleshooting Method
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Press "PATROL/e-ion" button or "OFF/ON" button to stop the operation and check the Active e-ion
Air Purifying system main connector to PCB.
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After that, press "e-ion" button again to confirm the e-ion indicator not blinking.
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The 24 times counter will be clear after 10 minutes of normal operation or when operation stops.
Error Reset Method
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Press "OFF/ON" button to OFF the operation.
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Press AUTO OFF/ON button at indoor unit to OFF the operation.
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OFF Timer activates
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Power supply reset
Active e-ion Air Purifying system breakdown error:
o
Judgment Method
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When hi-feedback voltage (at microcontroller) supplied to filter during e-ion stop, Active e-ion Air
Purifying system breakdown error shows immediately.
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It is due to indoor PCB or filter's high voltage power supply damage.
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Operations except e-ion continue. Both Timer indicator and e-ion indicator blink.
Troubleshooting Method
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Press "PATROL/e-ion" button or "OFF/ON" button to stop the operation.
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Change main circuit board or filter's high voltage power supply.
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When lo-feedback voltage supplied to Active e-ion Air Purifying system during e-ion operation, e-ion
indicator and Timer indicator stop blinking.

12.13 Mild Dry Cooling Operation

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This operation helps to prevent decreases in room humidity while maintaining the setting temperature.
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During unit running at Cooling operation mode, if "Mild Dry Cooling" button is pressed, Mild Dry Cooling operation
starts and Mild Dry Cooling indicators turns ON at remote control display.
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Mild dry cooling operation is unavailable when the unit is operating Auto mode, Soft Dry mode, Patrol individual
operation or e-ion individual operation.
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Mild dry cooling operation is cancelled when the unit turned OFF, pressed again Mild Dry Cooling button or when
the operation mode changed from Cooling to other mode.
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ECONAVI, Powerful, Quiet and Mild Dry Cooling mode cannot function at the same time, the unit will follows the
operation according to the last signal received.
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During this operation, the compressor frequency changes according to operating condition to prevent room
humidity decreases and when AUTO AIR SWING is set, the vertical airflow direction fixed at lower limit position.
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