Daikin MC401VE - Indicator Does Not Change from Dirty to Clean

Troubleshooting SiE74-202
22 Troubleshooting
1.2 Indicator does not Change from "Dirty" to "Clean"
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Air contamination indicator does not change to "clean" even when equipment is operated in
ventilated room for a whole day.
Supposed
Causes
 Faulty harness

Faulty sensor
Troubleshooting
Check humidity at installation site.
Check connector connection.
Correct connector connection
This does not denote
equipment malfunction.
Built-in high-performance
sensor detects moisture in
room air, and equipment
continues to operate at Low,
Normal or High.
•Change installation location.
•Unplug power cord,
reconnect, then restart
equipment.
Replace sensor
Are
X6A and X101A
connector connected
normal?
Check room condition after
equipment operation.
Is humidity
80% RH or lower?
Is room air clean?
(Z0007)
This does not denote equipment malfunction.
When the room is too large for the unit's capacity, the
indicator may still indicate "dirty" after smoke is removed.
This is caused by the high-performance sensor detecting
slight contamination in the room.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
YES
YES
NO
NO
NO