Troubleshooting by Indication on the Remote Controller
SiUS30-1301
218
Service Diagnosis
3.40 Check Operation is not Executed
Error Code
U3
Applicable
Models
RWEYQ72P, 84P
Method of Error
Detection
Check operation is executed or not executed.
Error Decision
Conditions
Error is decided when the unit starts operation without check operation.
Supposed
Causes
Check operation is not executed.
Troubleshooting
Has
the check operation
performed on condensing
u
nit PCB?
Performs the check operation
again and completes the check
operation.
Press and hold BS4 on the master
condensing
u
nit PCB for 5
seconds or more, to exec
u
te the
check operation.
N
O
YES
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.