Malfunctioning Indoor Pcb - Daikin Sky Air R-407C Service Manual

Error Codes: Indoor Units
2.2 Malfunctioning Indoor PCB (A1)
1
Error code
LED indications
3 3
Error generation
4
Causes
5
Troubleshooting
3–22
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.
To troubleshoot, proceed as follows:
The malfunction may be caused by an
external factor, rather than damaged parts.
Locate the cause and correct the situation.
HAP (green)
6
6
6
7
8
Switch the power off and
on again to restart.
Normal reset? No
Yes
ESIE02–01
HBP (green)
6
7
8
—
—
Replace indoor
PCB.
Part 3 – Troubleshooting