Daikin MCK75JVM-K Service Manual page 60

SiBE81-909
7.4.3 The odor / dust sensor lamp keeps lighting red.
Caution
1
Models Covered
MCK75JVM-K
2
Method of Mal-
function Detection
3
Malfunction Deci-
sion conditions
4
Supposed Causes
•
Wrong diagnosis
(Red lighting of the odor/dust sen-
sor during detecting dust or mois-
ture in the air was decided as
failure.)
•
The sensor is defective.
(The display PCB is defective.)
•
The dust sensor is defective.
Humidifying Air Purifier
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
5
Troubleshooting
Diagnosis
<When the odor sensor is lighting red:>
Check humidity of the
installation environment.
Is the humidity 80%
or lower?
Yes
Install the unit in another
room or corridor.
Does the lamp keep
lighting red?
No
<When the dust sensor is lighting red:>
Clean the air inlet port and the
peripheral area of the dust sensor.
Install the unit in another place.
Is the dust sensor
lamp changed?
No
Is the connector of
the dust sensor
connected?
Yes
Is the harness broken?
No
Troubleshooting
Remedy
No
This is not a failure.
The odor sensor
detects moisture in
the air.
•
Install the unit in
other place.
•
Reset the power
supply.
Yes
Replace the dis-
play PCB.
Check1
Go to
P. 64.
This is not a failure.
•
When the room is
too large or open,
the sensor is
always activated
due to insufficient
capacity.
Yes
This is not a failure.
No
Connect the con-
nector.
[S1, CN2]
Yes
Replace the har-
ness.
Replace the dust
sensor or the oper-
ation PCB.
Check1
Go to
P. 64.
on
on
59