Troubleshooting by Indication on the Remote Controller
SiUS28-902_B
98
Service Diagnosis
3.7
Drain System Abnormality
Remote
Controller
Display
AF
Applicable
Models
FCQ, FHQ, FAQ, FTQ
Method of Error
Detection
Water leakage is detected based on float switch ON/OFF operation while the compressor is in
non-operation.
Error Decision
Conditions
The float switch changes from ON to OFF while the compressor is OFF.
Supposed
Causes
Defective drain pipe (upward slope, etc.)
Defective indoor unit PCB
Troubleshooting
Field drain piping
has a defect s
u
ch as
u
p
w
ard
sloping.
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.
Caution
Defecti
v
e indoor
u
nit PCB.
Modify the drain piping.
YES
N
O
