Download "service manual"

Check code
<Float switch models>
Drain overflow protection
2502
Chart 2 of 2
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
Continued from the previous page
No
Is there a difficulty on the
moving part when pulling up
the float switch manually?
Yes
Solve the problem.
· Remove foreign substance such as dusts.
· Replace if the moving parts does not work.
No
Is the resistance of float
switch normal?
Yes *
Yes
No
Replace the float switch.
(Open)
(Short)
Disconnect the connector for
float switch (CN4F) and shortcircuit between pins 3-4 on the
indoor controller board, then start
cooling operation.
*Please refer to "How to check
the parts" on indoor units service
manual.
No abnormality
· The cause might be that the drain level was
unusualy high.
· Restore the float switch, and operate the unit.
Is the check code
<2502> still displayed?
Yes
Is the connector CNP
connected properly?
No
Connect the connector (CN4) properly.
No
Replace the indoor controller board.
Yes
Turn ON the emergency
operation switch (SWE).
Is 200 V AC output on
the connector CNP?
Yes
Check the voltage on both ends
of the branch connector.
Is 200 V AC output?
Check the branch connector for breakage
or contact failure.
No
Yes
Replace the drain pump.
OCH576
69