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Magnum MMG55FH User Manual

Magnum MMG55FH
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DIESEL GENERATOR
MMG25FHI • MMG35FH • MMG35FHP
MMG45FHK • MMG50FHP • MMG55FH
OPERATING MANUAL

Table of Contents

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Magnum MMG55FH Specifications

General IconGeneral
ModelMMG55FH
TypeModified Sine Wave Inverter
Output Power5500W
Input Voltage12 VDC
Output Voltage120 VAC
Frequency60 Hz
WaveformModified Sine Wave
CoolingFan Cooled
Protection FeaturesOverload Protection, Low Voltage Protection, Short Circuit Protection

Summary

Safety Notes and Guidelines

General Operating Safety Guidelines

Key safety practices to follow during generator operation, including area cleanliness and safe practices.

Engine Safety Precautions

Engine Operation Safety Precautions

Details hazards related to engine operation, including exhaust, fueling, hot surfaces, and moving parts.

Electrical Safety Precautions

Electrical Connection and Servicing Safety

Covers safety for electrical connections, wiring, and servicing, emphasizing qualified personnel.

COMPONENT LOCATIONS

MAIN CONTROL PANEL FEATURES MMG 25FHI-55FH

Control Panel Layout Diagram

Diagram showing the layout of controls and indicators on the main control panel.

MAIN CONTROL PANEL FEATURES DESCRIPTIONS

Control Panel Component Identification

Detailed descriptions of each numbered component on the main control panel.

MAGNUM DIGITAL CONTROLLER (MDC) OVERVIEW

MDC Functionality and Section Breakdown

Explains the MDC's role in monitoring and control, detailing its five main sections.

MDC Operation Keypad Functions

Describes the functions of the 'OPERATION' keypad buttons for starting and stopping.

MDC DISPLAY FUNCTIONS

MDC Generator Monitoring Displays

Details the generator information displayed on the MDC's LCD screen.

MDC Engine Monitoring Displays

Details the engine information displayed on the MDC's LCD screen.

MDC VOLTAGE ADJUSTMENT

Fine Voltage Adjustment Procedure

Step-by-step guide on how to adjust the generator's output voltage using the adjustment screw.

PRE-START CHECKLIST

Generator Pre-Start Inspection Items

A comprehensive checklist of items to verify before starting the generator.

MANUAL GENERATOR STARTING

Initial Manual Start Steps

Steps 1-3 for manually starting the generator, including control switch and display checks.

MANUAL GENERATOR STARTING SEQUENCE

Generator Start Sequence and Display Feedback

Details steps 4-8 of the manual start process, including prestart, cranking, and running screens.

MANUAL GENERATOR STARTING TROUBLESHOOTING

Troubleshooting Start Failures

Addresses 'SD Start fail' and how to repeat the starting sequence after starter cooldown.

SHUTTING DOWN THE GENERATOR

Generator Shutdown Procedure

Steps for safely shutting down the generator, including load removal and cool-down.

MDC CONTROLLER INFORMATION DISPLAYS

MDC Generator Operational Status Codes

Lists and explains the codes used by the MDC to indicate generator operational status.

MDC ALARM MANAGEMENT

MDC Alarm Types and Descriptions

Explains the types of alarms (Sensor fail, Warning, Shut down) the MDC can display.

MDC ALARMS AND DESCRIPTIONS

MDC Alarm and Fault Code Details

Provides a detailed table of possible alarms, their specifications, and descriptions.

MDC ALARMS AND DESCRIPTIONS CONTINUED

RESETTING SERVICE REMINDER

TROUBLESHOOTING SHUT DOWN CONDITIONS

Low Fuel Level Shut Down Troubleshooting

Steps to diagnose and resolve automatic shut down due to low fuel level.

TROUBLESHOOTING SHUT DOWN CONDITIONS CONTINUED

Low Oil Pressure Shut Down Troubleshooting

Steps to diagnose and resolve automatic shut down due to low oil pressure.

High Coolant Temperature Shut Down Troubleshooting

Steps to diagnose and resolve automatic shut down due to high coolant temperature.

Overcrank and Overspeed/Underspeed Shut Down Troubleshooting

Troubleshooting for generator shut downs related to overcrank or speed issues.

GENERATOR OUTPUT CONNECTION LUGS

GENERATOR CAM LOCK CONNECTIONS

VOLTAGE SELECTOR SWITCH

4-POSITION VOLTAGE SELECTOR SWITCH

EMERGENCY STOP SWITCH

Emergency Stop Switch Operation

Instructions on how to activate and use the emergency stop switch.

MAIN CIRCUIT BREAKER

CUSTOMER CONVENIENCE OUTLETS

STANDBY POWER INSTALLATION SAFETY

Generator Isolation and Wiring Safety Warnings

Critical safety warnings regarding isolating the generator and proper wiring for standby power.

ENGINE BREAK-IN REQUIREMENTS

DAILY WALK AROUND INSPECTION

DAILY MAINTENANCE CHECKS

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