Section 5 Troubleshooting; General Troubleshooting Guide - Generac Power Systems MAC 550F Owner's Manual

Section 5 Troubleshooting

General Troubleshooting Guide

Problem
Engine Cranks But Will Not
Start
Engine Will Not Crank
(Electric Start)
Engine Starts But Stops
Shortly Thereafter
Engine Running is Unstable
Owner's Manual for Flameless Air Heater
Cause
No fuel
Low oil level
Emergency shutdown switch is ON
Air in fuel system
Fuel filter is clogged
Fuel is frozen
Injection pump fails
Electromagnetic type fuel pump failure
Engine control system failure
Restricted air flow
LCD Display panel shows engine failure
Strainer is clogged
Pre-heating device failure
Dead battery
Battery terminal is disconnected, loose, or
corroded
Starter ground terminal is disconnected,
loose, or corroded
Engine oil viscosity is too high
Starter or electrical system failure
Idling is too low
Fuel filter is clogged
Pre-fuel filter is clogged
Air cleaner is clogged
Engine control system failure
Injection pump failure
Strainer is clogged
Electromagnetic type fuel pump failure
Fuel system failure
Water or air is in fuel system
Engine control system failure
Troubleshooting
Solution
Verify there is no fuel leakage and
replenish
Replenish oil to full
Turn emergency shutdown switch
OFF
Bleed air
Remove water and change
element
Warm fuel pipes with hot water or
wait until ambient temperature
rises
Contact Generac Technical
Service
Check/replace air filter
Contact Generac Technical
Service
Replace battery
Replace corroded part and tighten
securely
Change with oil of correct viscosity
Contact Generac Technical
Service
•
Adjust by idling
equipment on the machine
• If adjustment is not possible,
contact Generac Technical
Service
Remove water and change
element
Clean or change element
Contact Generac Technical
Service
Bleed air or remove water
Contact Generac Technical
Service
control
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