Daikin Sky Air R-407C - Malfunctioning Drain System (AF)

ESIE02–01 Error Codes: Indoor Units
Part 3 – Troubleshooting 3–27
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5
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2.5 Malfunctioning Drain System (AF)
Error code AF
LED indications The table below shows the LED indications.
Error generation The error is generated when the float switch changes from ON to OFF while the compressor is OFF.
Causes The possible causes are:
■ Error in the drain pipe installation
■ Malfunctioning float switch
■ Malfunctioning indoor unit PCB.
Troubleshooting To troubleshoot, proceed as follows:
Operation HAP (green) HBP (green)
Normal 66
Malfunctioning 66
Are float
switch and drain pipe
normal?
Is water
drainage system
normal?
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 to see if drain-up height
and horizontal pipe length
exceed specifications.
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.
Is drain-up
kit installed?
Is drain pump
normal?
Is
amount
of circulated drain
water excessive after
pump stops
operation?
Does
drain water
flow in reverse during
non-operation?
∗In FHY and FAY problems can also
occur in the optional drain-up kit.
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO