Emerson Damcos - Actuator Only Running in One Direction; (The Unit Can Either Only Open or Only Close); Actuator Only Running in One Direction (the Unit Can Either Only Open or Only Close)

Damcos LPU: Troubleshooting Guide LPU Service Manual
February 2017 SM 8000-100-01 Ed 04
53
Actuator only running in one direction
(the unit can either only open or only close)
LPU-D
If LPU-D can close, but not open check by-pass valve for oil filling. Check that solenoid valve is pow-
ered and working and that free travel of solenoid valve slide is OK.
LPU-S
If actuator can close, but not open see “Pump rendering too low (or no) pressure in one or both direc-
tions” on page 51. If actuator can open, but not close, see “Spring actuator only partly closing or not
starting to close” on page 58.
Note! BRCF and KF can always be closed by opening bypass valve at actuator. KFR can be closed
opening bypass valve and lifting valve for emergency operation by hand pump.