Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
21
Bulletin HY25-1650-M1/US
Installation Instructions
7. These settings are permanently held in memory until they are changed or
the user resets the unit to the “Default” mode.
8. To reset the unit to the “Default” mode the E.O.C. must be turned Off.
Depress both the “L” and “H” buttons simultaneously. All LED’s will flash
3 times to acknowledge the unit has been reset to the default mode. In the
“Default” mode, only the “On/Off” button is active and the over speed
feature is inactive. The unit may be used in this mode if desired.
Disabling the Speed Signal Detection Feature
There are some applications involving remote engine stopping / start-
ing that require this function be disabled. When disabled, the unit
remains functional even though there no signal being generated from
the P.T.O.’s speed sensor (engine stopped).
NOTE: The unit is preset from the factory with this feature enabled.
1. Depress the “B” and “L” buttons simultaneously disables the unit
from detecting a lack of a signal from the speed sensor. In this mode
the unit does not detect / display any faults due to the lack of a speed
signal from the speed sensor. The system remains in an operable
mode as long as 12 or 24 Vdc remains supplied to the unit. The unit
will flash the red and yellow LED’s (5) times to acknowledge the
speed sensor fault is disabled.
2. Depress the “B” and “L” buttons simultaneously again to enable the
unit to detect / display an error due to the lack of a speed signal from
the speed sensor. Both the red and yellow LED’s flash (4) times to
acknowledge the speed sensor fault is enabled.
NOTE: If there is a lack of a speed signal in this mode, the P.T.O. will
be disengaged and the white backlight around the On/Off button will
flash continuously.
Control Adjustment Instructions (Continued)
High Limit Set
(“H”)
Brightness
(“B”)
Low Limit Set
(“L”)
.28
Owner’s Manual
Electronic Overspeed Control
