A1" Indoor Unit: Pc Board Defect - Panasonic U-4..6ML5XPQ Service Manual

Panasonic
A1
" " Indoor Unit:
3.2
A1
Remote
Controller
Display
Applicable All indoor unit models
Models
Method of Check data from E²PROM.
Malfunction
Detection
Malfunction When data could not be correctly received from the E²PROM
E²PROM : Type of nonvolatile memory. Maintains memory contents even when the power
Decision
supply is turned off.
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
PC Board Defect
Defect of indoor unit PC board
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn power supply OFF, then
power ON again.
Does
the system return
to normal?
NO
Troubleshooting by Indication on the Remote Controller
YES
External factor other than
malfunction (for example,
noise etc.).
Replace the indoor unit PC
board.
(V2777)
143