External String Fuse; Smart Fans Replacement And Filter Cleaning - Delta M70A 260 Operation And Installation Manual

5.3 External String Fuse

According to different local regulations, if the external string fuse is required,
please contact Delta dealers.

5.4 Smart Fans Replacement and Filter Cleaning

M70A_260 and M50A_260 is provisioned with processor-controlled "smart fans"
for cooling of the electronics. This section provides procedures for cleaning filters
associated with these fans, and instructions for field replacement of the fans.
The system features detection of a failed fan, and generates a "FAN-FAIL" signal
that is interfaced to the inverter control to trigger a FAN-FAIL alarm and places
the inverter in a power de-rate mode as required for safe operation.
M70A_260 and M50A_260 has one fan tray for power module cooling and two
internal fans for inside air circulation.
Figures 5-10 illustrates the PM fan locations.
Figures 5-11, 5-12, 5-13 illustrates the internal fan 1.
Figures 5-14, 5-15, 5-16 illustrates the internal fan 2.
Periodic fan and filter cleaning is required to insure long life and reliability.
- The time period between cleanings depends on the quality of the environment.
- Under normal duty use, Delta recommends smart fans and filters be cleaned
every 4 months
- For very dusty locations, it may be necessary to clean the fans and filters
quarterly or monthly.
MDFU-10-66-20-H4
Figure 5-8: External String Fuse
ATTENTION
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Maintenance