Af" Failure Of Drain System - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

SiBE26-701
4.9

"AF" Failure of Drain System

AF
Remote
Controller
Display
Applicable FCQ, FBQ, FDQ, FFQ, FUQ
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
Supposed
Causes
Troubleshooting
Troubleshooting
Despite the malfunction code being indicated, the system continues operation.
Error in drain pipe installation
Faulty float switch
Faulty indoor unit PC board
Dust clogging at the solenoid valve incorporated in the humidifier.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Are float
NO
switch and drain pipe
normal?
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
nonoperation?
NO
Is water
NO
drainage system
normal?
YES
NO
YES
YES
Diagnosis by Remote Controller
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 PC board.
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 PC board.
113