Troubleshooting by Indication on the Remote Controller
SiUS30-1301
152
Service Diagnosis
3.2
PCB Abnormality
Error Code
A1
Applicable
Models
All indoor models
Method of Error
Detection
Check data from E²PROM.
Error Decision
Conditions
When data could not be correctly received from the E²PROM
E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power supply
is turned off.
Supposed
Causes
Defective of indoor unit PCB
External factor (Noise etc.)
Troubleshooting
Turn the power supply OFF,
then the power ON again.
Does the
system return to
normal?
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the indoor unit
PCB.
The indoor unit PCB is
normal.
External factor other than
error (for example, noise
etc.).
NO