Check code
Abnormal points and detection methods
Causes and check points
1
Malfunction of drain pump
2
Defective drain
Clogged drain pump
Clogged drain pipe
3
Water drops on drain sensor
Drops of drain trickles from lead wire
Clogged filter is causing wave of drain
4
Defective indoor controller board
5
Both of above mentioned
1
−
4
and the indoor linear
expansion valve full-closed failure (leakage) happens
synchronistically
Note:
Address/Attribute displayed on the remote controller
shows the indoor unit which is the cause of trouble.
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Diagnosis
Remedy
2502
<Drain sensor models>
Drain overflow protection
Chart 1 of 3
Drain pump (DP)
1
Let drain sensor self-heated, and if temperature rises slightly, as
suspensive abnormality operation stops and changes to protect mode of
restarting in 3 minutes.
2
Drain pump is abnormal if the condition above is detected during
suspensive abnormality. <2502> is displayed.
3
Malfunction of drain pipe is constantly detected during drain pump operation.
4
The unit enters to forced outdoor unit stop when following conditions,
a
and
b
, are satisfied (while the above mentioned detection is performed).
a
The drain sensor detects to be soaked in the water 10 times in a row.
b
Detected that [liquid pipe temperature−room temperature]
[
−10
:
for
30 minutes constantly.
Notes:
1. When the drain sensor detects to be NOT soaked in the water, the
detection record of
a
and
b
will be cleared.)
2. Drain pump abnormality (above
1
–
3
is detected before it becomes an
outdoor unit forced stop condition).
5
When indoor unit detects above
4
condition, outdoor unit in the same
refrigerant sytem stops. Also, indoor unit except for Fan or OFF mode unit
stop. <2502> is displayed on stopped unit.
6
Detection timing of forced outdoor unit stop
Constantly detected during unit operation and stop
7
Releasing of forced outdoor unit stop
Reset power supply of both abnormal indoor unit and its outdoor unit in
same refrigerant system. Forced outdoor unit stop cannot be released by
remote controller OFF.
Note:
Above-mentioned
1
–
3
and
4
–
7
are detected independently.
No
No
No
Yes
Does the drain pump work?
Is the drain level unusually
high?
Is there an adhesion
of water drops on the
drain sensor?
Check the drain discharge system for:
·
Dirty drain pan (needs to be cleaned)
·
Clogged drain pump
·
Clogged or reverse connection of drain pipe
Solve the problem.
·
Remove water drops.
·
Remove foreign substance such as dusts.
Start cooling operation.
Continue to the next page
Yes
Check code
65
OCH576
Summary of Contents for PUMY-P112VKM1
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