Indoor Unit Control Pcb Abnormality - Daikin VRV EMERION RXYQ-AATJA Service Manual

Troubleshooting by Error Code
3.5

Indoor Unit Control PCB Abnormality

Applicable
All indoor unit models
Models
A1
Error Code
Method of Error Check data from EEPROM.
Detection
Error Decision When data could not 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 control PCB
Causes  External factor (Noise, etc.)
Troubleshooting
251
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
SiUS342303E
The indoor unit control PCB
(A1P) is normal.
External factor other than
error (for example, noise
etc.).
Replace the indoor unit
control PCB (A1P).
Part 6 Service Diagnosis