U3" Check Operation Not Executed - Daikin R-410A Service Manual

SiBE39-402A

4.37 "U3" Check Operation not Executed

U3
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Check operation is executed or not
Malfunction
Detection
Malfunction
Malfunction is decided when the unit starts operation without check operation.
Decision
Conditions
! Check operation is not executed.
Supposed
Causes
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Has the check
NO
operation performed
on Outdoor unit
P.C.B?
YES
Troubleshooting by Indication on the Remote Controller
Press the BS4 on P.C. board on
the master outdoor unit for 5
seconds or more to execute check
operation.
Replace the main P.C. board on
the outdoor unit.
(V3052)
153