Troubleshooting by Indication on the Remote Controller
" PCB Defect
All indoor unit models
Check data from E²PROM.
When data could not be correctly received from the E²PROM
E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power supply is
Defect of indoor unit PCB
External factors such as noise
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Turn power supply OFF, then power
system return to normal?
The indoor unit PCB is normal.
External factor other than
malfunction (for example, noise
Replace the indoor unit PCB.