Indicator Does Not Change From "Dirty" To "Clean - Daikin MC401VE Service Manual

Troubleshooting
1.2

Indicator does not Change from "Dirty" to "Clean"

Method of
Malfunction
Detection
Malfunction Air contamination indicator does not change to "clean" even when equipment is operated in
Decision ventilated room for a whole day.
Conditions
Supposed
Causes
Troubleshooting
Check connector connection.
Check humidity at installation site.
22
Faulty harness
Faulty sensor
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Are
X6A and X101A
connector connected
normal?
YES
Is humidity
80% RH or lower?
YES
Check room condition after
equipment operation.
Is room air clean?
YES
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.
NO
NO
NO
SiE74-202
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
(Z0007)
Troubleshooting