10 Special Operating Conditions
Derating at high ambient temperature/insufficient cooling
The drive is featuring an automatic derating function that
is activated when the internal temperature measured in
the drive reaches a certain threshold. This temperature is
not necessarily directly related to the ambient
temperature. In such case, the drive reduces the speed of
the compressor to reduce heat losses in the drive. If the
overtemperature does not clear, the drive eventually will
stop and report a fault condition. Possible causes could
also be a malfunction of the cooling fan or blocked airflow
(leaves). See also
.
Derating at high installation altitude/low air pressure In
case of installing the drive in an altitude greater than 2000
m/6000 ft. cooling may become insufficient, if the ambient
temperature is at maximum at the same time (a very
unlikely coincidence).
Derating under unusual refrigeration process conditions
See Operating Instructions for the application controller.
Special Operating Condition...
VLT
®
Inverter Scroll CDS 801 Operating Instructions
50
MG10V402 - VLT
®
is a registered Danfoss trademark
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