Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 421)

Component Definition and Maintenance 6-77
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
Fluid Top-up
Keep the coolant at the proper level in the reservoir. There are two
float switches within the reservoir: one indicates a low coolant level
(LS-alarm) and requires a top-up of the fluid, and the other indicates
a very low coolant level (LSDL-trip) and triggers a shut down of the
drive. De-ionized water and chloride-free ethylene glycol or a
mixture of the two may be added to the reservoir. Use the 200-litre
(55-gallon) barrel to mix coolant and/or to premix the de-ionized
water and glycol. Check the freeze protection concentration with a
glycol tester and add fluid accordingly. Add coolant by pouring it
into the top of the reservoir.
I M P O R T A N T I M P O R T A N T Pour the coolant slowly into the reservoir to avoid
disturbing the coolant level switches and causing a
trip fault.
Filter
V8
Filter
V9
De-ionizing Cartridge
Figure 6.62 – Reservoir Circuit