Table of Contents
Advertisement
5.3 External String Fuse For M250HV
According to the regulations, when each group of DC input is configured as 3
strings, the external fuse is required. Please contact Delta dealers.
H4 PLUS Connector,
FEMALE
5.4 Smart Fans Replacement and Filter Cleaning
M250HV 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.
Depending upon the model, fans are installed at two locations within inverter:
• Power Module (PM) compartment
• Inside the inverter compartment
Figures 5-9 illustrates the PM fan locations.
Figures 5-10, 5-11, 5-12 illustrates the internal fan 1 locations.
Figures 5-13, 5-14, 5-15 illustrates the internal fan 2 locations.
Figures 5-16, 5-17, 5-18 illustrates the internal fan 3 locations.
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-20-66-20-H4S
380
Figure 5-7: External String Fuse
ATTENTION
67
Maintenance
H4 PLUS Connector,
MALE
Advertisement
Table of Contents
