A1" Malfunctioning Indoor Pc Board - Daikin SkyAir Service Manual

SiBE28-804
5.6

"A1" Malfunctioning Indoor PC Board

A1
Remote
Controller
Display
LED indications The table below shows the LED indications.
Operation
Normal
Malfunctioning
Error generation The error is generated when the data from the EEPROM is not received correctly.
EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds
its content without power. It can be erased, either within the computer or externally and usually
requires more voltage for erasure than the common +5 volts used in logic circuits. It functions
like non-volatile RAM, but writing to EEPROM is slower than writing to RAM.
Supposed The possible cause is a malfunctioning indoor PC board.
Causes
Troubleshooting
Troubleshooting
Troubleshooting by Remote Controller Display / LED Display
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Switch the power off
and on again to restart.
Normal reset?
YES
The malfunction may be caused by an
external factor, rather than damaged parts.
Locate the cause and correct the situation.
HAP (green)
5
5
5
4
7
NO
Replace
indoor PC board.
HBP (green)
5
4
7
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