Indoor Unit Pcb Abnormality - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E
4.2

Indoor Unit PCB Abnormality

A1
Error Code
Applicable
All indoor units
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
Supposed
Causes
Troubleshooting
Service Diagnosis
turned OFF.
Defective indoor unit PCB
External factor (Noise etc.)
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 main
PCB (A1P) is normal.
External factor other than
error (for example, noise
etc.).
Replace the indoor unit
main PCB (A1P).
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