PREVENTIVE AND CORRECTIVE MAINTENANCE
PRODUCT
ACS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS212794 E01
REV.
N
LANG.
en
PAGE
246/266
10.4.15. Testing and replacing auxiliary fan units
– Inspection intervals: see the “ACS6000 preventive maintenance schedule”
(3BHS855273 E01).
– Service during operation: possible
– Location: installed behind the doors of the following cabinets:
• COU cabinet (2 fan units)
• WCU cabinet (2 fan units in WCU and 2 fan units in the optional REB)
• Water-cooled EXU cabinet
10.4.15.1. Testing auxiliary fan units
To switch the fan units on and off for the test, use the thermostats of the fan units.
Procedure
1. Switch on the auxiliary voltage for the fan unit to be tested.
2. Take note the setting of the thermostat.
The factory-set value is also stated on the Settings label. The label is attached
to the inside of the cabinet door.
3. To switch on a fan unit, turn the dial of the thermostat from the factory-set
value to a low value.
4. Check that the fans run smoothly and if a fan is faulty, replace the complete
fan unit.
5. Set the thermostat to the factory-set value.
Thermostat location Identification Factory-set value
COU B2981 45° C
WCU B5741 45° C
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