Testing The Fan Units - ABB ACS6000 User Manual

A thermostat inside the cabinet where air-to-air heat exchanger is
installed controls the internal fans (3 and 5 in Fig. 10-26). The fans are
switched on when the cabinet temperature exceeds the value set on
the thermostat.
The ambient fans (1 and 2 Fig. 10-26) are switched on by the air-to-air heat
exchanger depending on the permanently measured cabinet temperature.

10.4.16.1 Testing the fan units

To switch the fan units on and off for the test, use the thermostats of the
fan units.
Thermostat location
ARU
INU
Procedure
1. Switch on the auxiliary voltage for the air-to-air heat exchanger.
2. Take note of 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 start a fan or a group of fans, adjust the setting of the thermostat
to a low value (arrow).
4. Check that the fans run smoothly and if a fan is defective, replace the
complete fan unit.
5. Adjust the setting of the thermostat to its original value.
3BHS212794 E01 REV M
10 PREVENTIVE AND CORRECTIVE MAINTENANCE
Identification
B7501
B7501
ACS6000 USER MANUAL
Factory-set value
45 °C
45 °C
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