Section 5: Troubleshooting; General Troubleshooting Guide - Generac Power Systems MIH1.2 Owner's Manual

Section 5: Troubleshooting

General Troubleshooting Guide

Problem
Engine does not crank
Starter cranks slowly
Hard to start, or does not
start
Owner's Manual for Indirect Fired Heater
Cause
Low battery output voltage or discharged
battery.
Loose or corroded connections.
Faulty start circuit relay.
Blown fuse.
Faulty main switch or start safety switch.
Faulty starter solenoid.
Faulty starter.
Low battery output voltage or discharged
battery.
Excessive crankcase oil viscosity.
Loose or corroded connections.
Engine starting under load.
Incorrect starting procedure.
Restricted exhaust.
No fuel.
Air in fuel line.
Poor fuel quality.
Water, dirt, or air in fuel system.
Fuel filter restricted or full of water.
Dirty or faulty fuel injectors.
Electronic fuel system failure.
Cold weather.
Excessive crankcase oil viscosity.
Electronic control system problem or basic
engine problem.
Solution
Charge or replace batteries. See
tery Inspection.
Clean and tighten connections.
Contact a GMASD.
Replace fuse.
Repair switch as required.
Replace solenoid.
Replace starter.
Charge or replace batteries. See
tery Inspection.
Drain crankcase oil and replace with
correct viscosity oil. See
Refilling the Oil.
Clean and tighten connections.
Disengage PTO.
Review starting procedure. See
and
start Checklist Engine and
Heater Startup.
Inspect and correct exhaust restriction.
Check fuel tank.
Purge fuel lines. See engine manual.
Drain fuel and replace with proper
grade and quality of fuel for operating
condition.
Drain, flush, fill, and purge fuel system.
Replace fuel filter or drain water from
fuel filter.
Contact a GMASD.
Use cold weather starting aids (see
engine manual).
Drain crankcase oil and replace with
correct viscosity oil. See
Refilling the Oil.
Contact a GMASD.
Bat-
Bat-
Draining and
Pre-
Draining and
25