Smart Fans Replacement And Filter Cleaning - Delta M70A-262 Operation And Installation Manual

Maintenance

5.3 Smart Fans Replacement and Filter Cleaning

M70A_262 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 fans utilized have high reliability ratings and coupled with use of processor
controls provide a "smart" cooling system design with a long life. The system
features tachometer 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.
Depending upon the model, fans are installed at two locations within inverter:
• Power Module (PM) compartment
• Inside the inverter compartment
Figures 5-9, 5-10 illustrates the PM fan locations.
Figures 5-11, 5-12, 5-13 illustrates the internal fan 1 locations.
Figures 5-14, 5-15, 5-16 illustrates the internal fan 2 locations.
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