Emergency Stop Switch; Idle Switch; Using The Ecu Override Switch; Towing The Unit - Generac Power Systems MDG25IF4 Owner's Manual

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Operation

Emergency Stop Switch

CAUTION
Equipment Damage. The emergency stop switch is
not to be used to power down the unit under normal
operating circumstances. Doing so will result in
equipment damage.
See
Figure
2-3. The unit is equipped with one
emergency stop switch. The red button is clearly labeled
EMERGENCY STOP. The switch can be accessed and
activated with all doors closed and locked.
Activate the emergency stop switch by pushing the
button in until it locks down. This trips the main circuit
breaker which then opens the contact, disconnecting the
load to the connection lugs. This will also open the fuel
circuit, shutting down the engine. The emergency stop
fault will be displayed on the control panel. The switch
will remain closed until it is pulled out.

Idle Switch

The idle speed is 1,000 to 1,200 rpm. The engine will
start at idle speed and run at idle for 15 seconds no
matter what position the idle switch is in. After 15
seconds of running at idle, the unit will ramp up to 1,800
rpm if the idle switch is OFF. Otherwise the unit will
continue to idle if the idle switch is ON.
When the engine is at idle speed (1,000 RPM), the
voltage regulator will not function and the output voltage
is dropped out by the voltage regulator.
IMPORTANT NOTE: Do not apply load to the unit
when the engine is running at idle speed.

Using the ECU Override Switch

CAUTION
Equipment Damage. Do not start the engine
with the Engine Control Unit (ECU) override
switch ON. Doing so will damage the ECU.
IMPORTANT NOTE: Starting the engine with the
ECU override switch ON will not allow the engine to
shut down properly using the Engine STOP Button.
This must only be used when the engine is OFF.
See
PowerZone® Controller
override switch. This toggle switch powers up the ECU
without having to start the engine. Use the ECU override
switch to turn the ECU OFF. If the unit needs to be shut
down immediately, use the emergency stop switch. See
Emergency Stop
Switch.
32
(000246)
(000305)
for location of the ECU

Towing the Unit

WARNING
Personal injury. Trailer must be securely coupled to
the hitch with the chains correctly attached. Uncoupled
or unchained towing could result in death or serious
injury.
WARNING
Personal injury. Do not operate unit during transport.
Doing so could result in death, serious injury, or
property damage.
WARNING
Crushing hazard. Verify unit is properly secured and
on level ground. An unsecured unit can suddenly roll
or move, causing death or serious injury.
1. Verify the engine is OFF.
2. Use the tongue jack to raise or lower the trailer
onto the hitch of the towing vehicle. Lock the hitch
coupling and attach the safety chains or cables to
the vehicle. Release the jack locking pin and rotate
the jack into the travel position. Verify the locking
pin snaps into place.
NOTE: A film of grease on the coupler will extend
coupler life and eliminate squeaking. Wipe the coupler
clean and apply fresh grease each time the unit is towed.
3. Lubricate the grease fittings located on the leveling
jacks to verify proper operation of the jacks. See
Jack Maintenance.
information, see
Basic Maintenance Schedule.
4. Connect trailer wiring to the tow vehicle. Check for
proper operation of the directional and brake lights.
5. Verify all doors and hoods are properly latched.
6. Check for proper inflation of the trailer tires. Proper
inflation is specified in Specifications.
7. Check the wheel lugs. Tighten or replace any lugs
that are loose or missing. If a tire has been re-
moved for axle service or replaced, tighten the lugs
in the order shown in
specifications:
a.
Start all lug nuts by hand.
b.
First pass tighten to 20–25 ft-lbs (27–33 Nm).
c.
Second pass tighten to 50–60 ft-lbs (67–81 Nm).
d.
Third pass tighten to 90–120 ft-lbs (122–162 Nm).
(000233a)
(000231a)
(000234a)
For maintenance interval
Figure 3-11
to the following
Owner's Manual for MDG25IF4

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