Drain System Abnormality - Daikin 2MXS40H2V1B Service Manual

SiBE121123_A
6.4

Drain System Abnormality

AF
Error Code
Method of Error Water leakage is detected based on the float switch ON/OFF changeover while the compressor
is not operating.
Detection
Error Decision When the float switch changes from ON to OFF while the compressor is OFF
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
Error in the drain pipe installation
Defective float switch
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Are
the float switch and
the drain pipe
normal?
YES
Is the
water drain system
normal?
YES
NO
NO
Troubleshooting for SA Indoor Unit
The float switch may be
defective. Check if the
drain-up height and the
horizontal pipe length
exceed the specifications.
Clogged water drain
system, clogged drain
pump, or faulty float switch
Replace the indoor unit
PCB. Check if the drain-up
height and the horizontal
pipe length exceed the
specifications.
(R16022)
172