Section 9: ELECTRICAL COMPONENTS AND CICUITRY
Page 71
OM-ZR-May15
Changing Engine Speed
Stopping Diesel Engine
Turning the SLOW-FAST SWITCH on the PENDANT to SLOW sends a signal to the engine ECM to decreases
engine rpm. Turning the SLOW-FAST SWITCH on the PENDANT to FAST increases engine rpm. The switch
must be held in position for 2 seconds before engine rpm will change.
Turning the ENGINE POWER (EP) switch to OFF sends a signal to the ECM to stop the engine.
Emergency Stop
When the diesel engine is running, pressing the EMERGENCY STOP (ES) button on the PENDANT or the
CONTROL PANEL sends a signal to the ENGINE CONTROL MODULE (ECM) which immediately shuts down the
engine and vibrator. To restart the engine, follow the normal engine start procedure.
Hydraulic System Monitoring
The control system monitors the hydraulic system for any of the following abnormal operating conditions:
1. Clogged hydraulic return filters
2. Low hydraulic oil in reservoir
3. High hydraulic oil temperature
If either of these conditions occurs, a signal is sent to the ENGINE CONTROL MODULE (ECM) to shut down the
engine. A fault light on the control panel is illuminated.
If the hydraulic oil level in the reservoir is low, the HYDRAULIC FLUID LEVEL switch (HOL) turns on the HYD.
OIL LEVEL LOW light on the control panel.
If the hydraulic oil pressure at the return filters is too high and the hydraulic oil temperature is warm, the
RETURN FILTERS PRESSURE SWITCH (PS2) and RETURN FILTERS TEMPERATURE SWITCH (TS1) turn on the
RETURN FILTER CLOG light on the control panel.
If the hydraulic oil temperature in the reservoir is too high, the HYDRAULIC OIL TEMPERATURE SWTTCH (TS2)
turns on the HYD. OIL TEMP. HIGH light on the control panel.
The fault light goes out when the condition is corrected. After correcting the condition, follow normal engine
start procedure. The engine may be restarted before correcting these conditions by pressing the HYDRAULIC
OVERRIDE BUTTON (HO) inside the control panel.
If the hydraulic oil temperature in the reservoir is too low, the HYDRAULIC OIL TEMPERATURE SWTTCH (TS3)
turns on the HYD. OIL TEMP. LOW light on the control panel. The engine is not shut down.
Starting Diesel Engine
The ENGINE BATTERIES (B) provide 24 volt current to start the diesel engine. Turning the ENGINE POWER
(EP) switch to START energizes the ENGINE STARTER (S) which starts the diesel engine.
On both PENDANT and CONTROL PANEL, the MAIN switch and the AUXILIARY switch must be in the OFF posi-
tion and the clamp (OPEN-CLOSE) switch must be in the center (neutral) position to allow engine start. If any
of these switches are not in the correct position for engine start, the engine will not start.
