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Si20-701_B
Troubleshooting by Remote Controller
106
Is the
water drainage
system normal?
NO
Clogged drain
water discharge
system
Clogged drain
pump
Defective float
switch
Replace the
indoor unit PCB.
Check to see if
drain-up height
and horizontal
pipe length
exceed
specifications.
YES
∗
In FHY, FAY, and FHQ problems
can also occur in the optional
drain pump.
Is drain
pump installed?
NO
YES
Check the
jumper
connector.
Is drain
pump normal?
NO
YES
Check the drain
pump and the
drain pipe.
Is
amount of
circulated drain
water excessive after
pump stops
operation?
YES
NO
Check the water
drainage system.
Check to see if
drain-up height
and horizontal
pipe length
exceed
specifications.
Does
drain water
flow in reverse during
non-operation?
YES
Defective trap in
water drainage
system
Replace the
indoor unit PCB.
NO
A