User's Manual Part 3

RBS 2109 User’s Guide
P010581A
Test
FAN UNT-01
Fault
Opera-
tional
Figure 78 Fan Unit Test Button
5. Check that the test sequence below is carried out:
• The fans run at maximum s
peed for approximately 5 seconds
• The fans run at nominal speed for approximately 5 seconds
• The fans stop for approximately 5 seconds
6. Ensure that the indicator status of the fan unit is in accordance with the
table below:
Table 53 Fan Unit Indicators After Test
Fan Unit Indicator LEDs
Status
Fault Off
Operational On
Replacing Fan Unit
7. Replace the fan unit, see Section 9.5.4 Fan Unit Replacement on page 199.
9.3.7 SO CF RU:31/ Environment
This section describes how to localise an SO CF RU:31/ Environment fault.
This fault is only generated by external factors, for example climate or incoming
power.
Related RU
The RU listed below has higher priority than the RU described in this section. If
it is present, go to the related section before handling this RU.
• If ‘‘SO CF RU:34/ IDB’’ appears in the OMT, then proceed with Section
9.3.8 SO CF RU:34/ IDB on page 169
167EN/LZT 720 0090 Uen R1A 2004-09-17