Daikin SiBE81-909 Service Manual page 63

Troubleshooting
7.4.6 Humidity is not increased, or the humidity sensor lamp is not changed.
Caution
1
Models Covered
MCK75JVM-K
2
Method of Mal-
function Detection
3
Malfunction Deci-
sion conditions
4
Supposed Causes
•
The humidity sensor PCB is defec-
tive.
•
The display PCB is defective.
•
The operation PCB is defective.
•
The connector is improperly con-
nected.
•
The harness is broken.
62
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
5
Troubleshooting
Do the 4
humidity switching lamps
simultaneously
Is the connector of the
humidity sensor PCB
connected?
Is the harness broken?
Diagnosis
Check humidity in the
installation environment.
No
Move the unit to other
humidity environment
blink?
such as another room.
Yes
Is humidity in the
display changed?
No
Yes
Yes
No
Remedy
Yes
This is not a failure.
No
Replace the humid-
ity sensor PCB or
the operation PCB.
Check1
Go to
P. 64.
Connect.
[S4] [CN1]
Replace the har-
ness.
Replace the humid-
ity sensor PCB, the
display PCB, or the
operation PCB.
Check1
Go to
P. 64.
Humidifying Air Purifier
SiBE81-909
on
on