Malfunctioning Indoor Pcb - Daikin R-410A Service Manual

Error Codes
2.2 Malfunctioning Indoor PCB (A1)
1
Error code
LED indications
3 3
Error generation
4
Causes
5
Troubleshooting
Caution
3–32
A1
The table below shows the LED indications.
Operation
Normal
Malfunctioning
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.
The possible cause is a malfunctioning indoor PCB.
The malfunction may be caused by an
external factor, rather than damaged parts.
Locate the cause and correct the situation.
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
HAP (green)
c
c
c
w
x
Switch the power off
and on again to restart.
Normal reset?
No
Yes
ESIEN05-04
HBP (green)
c
w
x
—
—
Replace
indoor PCB.
Part 3 – Troubleshooting