Panasonic CS-E12NKDW, Service Manual

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nanoe-G check mode
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To enable nanoe-G check mode, during nanoe-G operation ON:
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If there is abnormal discharge, nanoe-G indicator blinks immediately.
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Error detection control
When nanoe-G indicator blinks, it indicates error listed below:
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nanoe-G connector at main PCB open
ƒ Judgment method
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During nanoe-G operation, nanoe-G connector at main PCB is opened.
ƒ Troubleshooting method
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Connect the connector or stop operation to cancel the blinking
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Abnormal discharge error
ƒ Judgment method
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During nanoe-G operation, the nanoe-G system has abnormal discharge due to short-circuit caused
by water or dust adhesion and so forth, with Lo-feedback voltage (at microcontroller).
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When abnormal discharge occurred, every 30 minutes the unit supplies power to the nanoe-G
system.
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When abnormal discharge occurs for 24 times continuously, nanoe-G indicator blinks.
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Troubleshooting method
ƒ Press nanoe-G button or OFF/ON button to stop the operation and check the nanoe-G connector at PCB.
ƒ After that, press nanoe-G button again to confirm the nanoe-G indicator do not blinks.
ƒ The 24 timer counter will be clear after 10 minutes of normal operation or when operation stops.
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Error reset method
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Press OFF/ON button to OFF the operation.
ƒ Press AUTO OFF/ON button at indoor unit to OFF the operation.
ƒ OFF Timer activates
ƒ Power supply reset.
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nanoe-G breakdown error
ƒ Judgment method
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Hi-feedback voltage (at microcontroller) supplied to the nanoe-G system when nanoe-G operation is
OFF; nanoe-G breakdown error show immediately.
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It is due to indoor PCB or nanoe-G high voltage power supply damage.
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Operations except nanoe-G continue. Both Timer indicator and nanoe-G indicator blink.