Service manual

Si-64 Troubleshooting
Troubleshooting 27
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.
YES
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 X14A and
X101A normal?
NO
Check room
condition after
equipment operation.
YES
YES
Is humidity
80% RH or lower?
NO
Is room air clean?
NO
(EF003)
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.