Daikin E Series, Service Manual

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Troubleshooting for SkyAir Indoor Unit SiAU18-715
334 Troubleshooting
5.3 Malfunction of Drain System
Remote
Controller
Display
AF
Applicable
Models FHQ
Method of
Malfunction
Detection Water leakage is detected based on float switch ON/OFF operation while the compressor is in
non-operation.
Malfunction
Decision
Conditions When the float switch changes from ON to OFF while the compressor is in non-operation.
Supposed
Causes
„
Error in drain pipe installation
„
Faulty float switch
„
Faulty indoor unit PCB
Troubleshooting
Is drain-up kit installed?
Are float
switch and drain pipe
normal?
Is water
drainage system
normal?
Is drain pump normal?
Is amount
of circulated drain
water excessive after
pump stops
operation?
Does
drain water flow in
reverse during
nonoperation?
Possible failure of float switch.
Check to see if drain-up height
and horizontal pipe length
exceed specifications.
Clogged drain water discharge
system
Replace indoor unit PCB.
Check jumper connector
X15A.
Check drain pump and drain
pipe.
Check water drainage system.
Check to see if drain-up height
and horizontal pipe length
exceed specifications.
Faulty trap in water drainage
system
Replace indoor unit PCB.
∗
In FHQ-B problems can also occur in
the optional drain-up kit.
(Q0533)
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Clogged drain pump
Faulty float switch
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.