Indoor Unit Pcb Abnormality - Daikin SkyAir RZR-TA Series Service Manual

Troubleshooting by Error Codes
4.6

Indoor Unit PCB Abnormality

A1
Error Code
Applicable All indoor models
Models
Method of Error Data from EEPROM is checked.
Detection
Error Decision
When data cannot be correctly received from the EEPROM
Conditions EEPROM: Type of nonvolatile memory. Maintains memory contents even when the power supply is
turned OFF.
Supposed  Defective indoor unit PCB
Causes  External factor (Noise etc.)
Troubleshooting
218
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn the power supply OFF,
then the power ON again.
Does the
system return to
normal?
NO
YES
SiUS281811EA
The indoor unit main
PCB (A1P) is normal.
External factor other than
error (for example, noise
etc.).
Replace the indoor unit
main PCB (A1P).
Part 6 Service Diagnosis