Daikin D-Series, Service Manual

Page: 379 / 479

Troubleshooting for Outdoor Unit Si18-525B
366 Troubleshooting
7. Troubleshooting for Outdoor Unit
7.1 Faulty Outdoor Unit PCB
Remote
Controller
Display
E1
Applicable
Models AII outdoor unit models
Method of
Malfunction
Detection Check data from E²PROM
Malfunction
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 Defect of outdoor unit PCB (A1P)
Troubleshooting
Turn off the power once and
turn on again.
Return to normal?
YES
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
External factor other than
malfunction (for example,
noise etc.).
Replace the outdoor unit
main PCB A1P.
(Q0421)
NO