Malfunction Of Drain System - Daikin E-Series Service Manual

Troubleshooting for SkyAir Indoor Unit
5.3

Malfunction of Drain System

AF
Remote Control
Display
Applicable
FHQ-BU
Models
Method of
Water leakage is detected based on float switch ON/OFF operation while the compressor is in
Malfunction non-operation.
Detection
Malfunction
When the float switch changes from ON to OFF while the compressor is in non-operation.
Decision
Conditions
" Error in drain pipe installation
Supposed
" Faulty float switch
Causes
" Faulty indoor unit PCB
Troubleshooting
284
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Are float switch
NO
and drain pipe
normal?
YES
∗In FHQ-B problems can also occur in
the optional drain-up kit.
Is drain-up kit
installed?
YES
Is drain pump
normal?
YES
Is amount
of circulated drain
water excessive after
pump stops
operation?
NO
Does drain
water flow in reverse
during non
operation?
NO
NO
Is water drainage
system normal?
YES
NO
NO
YES
YES
SiENBE18-621
Possible failure of float switch.
Check to see if drain-up height
and horizontal pipe length
exceed specifications.
Clogged drain water discharge
system
Clogged drain pump
Faulty float switch
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.
(S2733)
Troubleshooting