U3" Check Operation Not Executed - Daikin FCQ18PVJU Service Manual

Troubleshooting by Indication on the Remote Controller
U3
3.37 " " Check Operation not Executed
U3
Remote
Controller
Display
Applicable
RZQ18~30PVJU
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
133
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Has the
check operation NO
performed on Outdoor
unit P.C.B.?
YES
SiUS28-902_a
Push the BS4 on P.C.B. on the
master outdoor unit for 5 seconds
or more to execute check
operation.
Replace the main P.C.B. on the
outdoor unit.
Troubleshooting