Malfunctioning Drain System - Daikin FCQ35B7V1 Service Manual

ESIE05-04
2.4 Malfunctioning Drain System (AF)
AF
Error code
LED indications The table below shows the LED indications.
Operation
Normal
Malfunctioning
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:
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Part 3 – Troubleshooting
Error in the drain pipe installation
Malfunctioning float switch
Malfunctioning indoor unit PCB.
Are float
switch and drain
pipe normal?
YES
∗ In FHQ and FAQ 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?
YES
Does drain
water flow in reverse
during non-
operation?
YES
HAP (green)
c
c
NO
Is water
NO
drainage system
normal?
YES
NO
NO
NO
NO
Error Codes
HBP (green)
c
c
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
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.
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