SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
133
3.35 Transmission Error (between Control and Inverter PCB)
Remote
Controller
Display
LC
Applicable
Models
RZR, RZQ
Method of Error
Detection
Check the communication state between inverter PCB and control PCB by micro-computer.
Error Decision
Conditions
When the correct communication is not conducted in certain period
Supposed
Causes
Incorrect transmission wiring between control and inverter PCB/Insufficient contact in wiring
Defective outdoor unit PCB
Defective outdoor unit fan motor
External factor (Noise etc.)
Defective fan motor connector contact
Troubleshooting
Is "
E7
"
displayed on the remote
controller? (not "
LC
")
Is the
connector for the
fan motor properly
connected to the indoor
u
nit PCB?
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
Disconnect the connection for
the fan motor, and t
u
rn O
N
again.
Replace the o
u
tdoor
u
nit PCB
(A1P).
Replace the fan motor.
Transmission error of the
in
v
erter occ
u
rs d
u
e to the fan
motor error.
Connect correctly.
Caution
N
O
YES
YES
N
O
