Mitsubishi Electric PUMY-P112VKM1, Руководство по обслуживанию

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