Indoor Unit Pcb Abnormality - Daikin VRV X RXQ6-48ANR Series Service Manual

SiME341909EA
5.4

Indoor Unit PCB Abnormality

Applicable All indoor unit models
Models
A1
Error Code
Method of Error Data from EEPROM is checked.
Detection
Error Decision
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 control PCB
Causes  External factor (Noise etc.)
Troubleshooting
Part 6 Service Diagnosis
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
Troubleshooting by Error Code
The indoor unit control
PCB (A1P) is normal.
External factor other than
error (for example, noise
etc.).
Replace the indoor unit
control PCB (A1P).
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