Indicator rods on the pump heads do not move
Fan on the back of the pump does not move when the unit is turned on
When a gradient is programmed on the 600 Controller, the gradient proportioning valve in the pump is heard functioning
- Modular LC
- 600E pump
Bad pump power fuse
FIX or WORKAROUND
Replace FUSE,6A,125V,5X20MM FAST-ACTING UL (WAT162-23), which is located on the rear panel of the Waters 600 pump controller, as shown below.