Product Manual
Table Of Contents
- Section 1: Introduction and Safety
- Section 2: General Information
- Section 3: Operation
- Pre-start Checklist
- Manually Starting the Unit
- AUTO (Remote) Starting the Unit
- Wet Stacking
- Cold Weather Operation
- Using a Booster Battery or Charger (if equipped)
- Generator Output Connections
- Generator Cam Lock Connections (If Equipped)
- Using the Voltage Selector Switch
- Fine Voltage Adjustment
- Voltage Regulator
- Achieving 240V Three-Phase in 208V Three-Phase (Parallel Low Wye) Configuration
- Customer Convenience Receptacles
- Main Circuit Breaker
- Transfer Switch
- AUTO Exercise Timer
- Shutting Down the Unit
- Emergency Stop Switch
- Idle Switch
- Using the ECU Override Switch
- Towing the Unit
- Lifting the Unit
- Section 4: Maintenance
- Section 5: Troubleshooting
- Section 6: Wiring Diagrams and Service Log
- Wiring Diagram - 3 Position AC Box
- Wiring Diagram - 4 Position AC Box
- Wiring Diagram - Receptacles
- Wiring Diagram - Engine Heater
- Wiring Diagram - Wiring Buck (If Equipped)
- Wiring Diagram - Power Zone PMG
- Wiring Diagram - Power Zone Control Box
- Wiring Diagram - Trailer Lights
- Wiring Diagram - Brake Wiring
- Wiring Diagram - 12V Battery Charger
- Wiring Diagram - Power Zone Low Oil Level (If Equipped)
- Service Log
Owner’s Manual for MDG25IF4 29
Operation
After verifying the unit has V4 or higher of the PowerZone
controller application, proceed as follows to achieve
240V while in the 208V configuration:
4. Starting in any of the operator screens, press ▲,
►, ▼, or ◄ to enter the maintenance screens.
5. Press and O simultaneously. The next screen
will display the configuration menu.
6. Press ▼ to move the cursor (blue highlighted text)
down to Config Selection.
7. Press ► to highlight Config to Edit. Press ► again
to highlight Selected Configuration. Then press
to access the selections.
8. Press ▲ to highlight Alternative Configuration 1.
Press .
9. Press ◄ two times to get back to the far left
column.
10. Press ▼ to highlight Password Entry. Press to
display the Pin Entry screen. Press again to
access to password entry. The left most pound sign
should change to 0.
11. Press ▲, ►, ▼, or ◄ to enter the password 4444 if
applicable. Press .
12. Press ▼ to highlight Generator. Press ► again to
access the selections.
13. Press ▼ to highlight Generator Voltage. Press ►
again to access the selections.
14. Press ▼ to highlight Over Voltage Alarms. Press
► again to access the selections.
15. Press ▼ to highlight Alarm Trip and press to
adjust the voltage.
NOTE: Alarm trip setting must be changed first in order
to set the pre-alarm trip setting.
16. Press ▲ until the voltage becomes 153V. Press .
17. Press ▲ and to adjust the voltage for the Pre-
alarm Trip.
18. Press ▲ until the voltage becomes 151V. Press
.
NOTE: It is recommended the current trip settings are
also changed. The current values will depend on the unit.
19. Press ▲ and hold for five seconds until the
saving screen appears. The screen will then return
to the maintenance screens.
NOTE: Change the alarm settings back for the 208V
configuration according to Changing Back to 208V
Configuration.
Changing Back to 208V Configuration
When finished with the 240V settings, change the alarm
settings back to the 208V configuration. Follow steps in
Achieving 240V Three-Phase in 208V Three-Phase
(Parallel Low Wye) Configuration, changing the pre-
alarm trip to 132V and the alarm trip to 134V.
NOTE: Verify the pre-alarm trip setting is adjusted before
the alarm trip setting in order to set the alarm trip setting.
Customer Convenience
Receptacles
See Figure 2-4. The unit is equipped with four
receptacles. The 240/120V twist-lock receptacles are
rated at 50A each. The 120V GFCI receptacles are rated
at 20A each, with ground fault circuit interrupt (GFCI)
protection. The receptacles are not routed through the
main circuit breaker. Each receptacle has its own circuit
breaker, located directly above or next to the receptacle.
Each breaker is sized to the maximum rating of the
corresponding receptacle.
NOTE: Power to the receptacles is available any time
the generator is running, even if the main circuit breaker
is OFF (O). Verify equipment connected to the
receptacles is turned OFF before turning the breakers
ON (I).
NOTE: When the voltage selector switch is in position for
480/277V three-phase, voltage at the two GFCI
receptacles is 139 volts and the voltage at the three twist-
lock receptacles is 240/139 volts. Generac Mobile
Products LLC does not recommend using the
receptacles in the 480V position. When the voltage
selector switch is in position for 208/120V three-phase,
voltage at the two twist-lock receptacles and the two
GFCI receptacles is 208/120 volts.
Main Circuit Breaker
The main circuit breaker is located on the main control
panel. See Figure 2-4. When the breaker is OFF (O),
power is interrupted to the connection lugs, the optional
cam lock receptacles, and the generator. The breaker
may be switched ON (I) once the connections have been
made to the connection lugs or the optional cam lock
receptacles, and the unit has been started and allowed to
reach normal operating temperature.
Reasons the main circuit breaker may trip:
• Overload of the generator circuits to the connection
lugs or the optional cam lock receptacles.
• The door covering the connection lugs or the
optional cam lock receptacles is opened.
• If the emergency stop switch is activated.
Verify any problems that cause the main circuit breaker to
trip are corrected before returning the switch to ON (I).
CAUTION
(000303)
Equipment Damage. Verify voltage application before
making changes to factory settings. Incorrect voltage
applied to a load could result in equipment damage.