Section 7.1

GENERATOR & SPEED CONTROL SYSTEM

TROUBLESHOOTING REFERENCE CHART

 

PROBLEM

POSSIBLE CAUSE

REMEDY

PAGE

 

 

 

 

 

 

 

 

1. Engine starts, accelerates,

a. Carburetor linkage sticking with

a. Repair sticking throttle

3.4-3

 

 

shuts down at 4500 rpm

throttle stuck open.

 

 

 

 

 

b. Stepper Motor failed or seized.

b. Replace Stepper Motor.

3.6-1

 

 

 

c. Stepper Motor wire connections

c. Reconnect or repair.

3.6-1

 

 

 

broken or disconnected.

 

 

 

 

 

d. Stepper Motor not properly connected.

d. Reconnect wires.

3.6-1

 

 

 

 

 

 

 

 

2. Overvoltage condition and

a. Carburetor linkage sticking with

a. Repair sticking throttle.

3.4-3

 

 

speed control system cannot

throttle stuck partly open.

 

 

 

 

reduce output voltage.

b. Stepper Motor failed or seized.

b. Replace Stepper Motor.

3.6-1

 

 

 

c. Connection to Stepper Motor is

c. Repair or replace connections.

3.6-1

 

 

 

broken/disconnected with throttle open.

 

 

 

 

 

d. Stepper Motor not properly connected.

d. Reconnect Stepper Motor wires.

3.6-1

 

 

 

 

 

 

 

 

3. Engine speed is maintained

a. Carburetor linkage sticking with

a. Repair sticking throttle.

3.4-3

 

 

and no-load voltage is good.

throttle partly open.

 

 

 

 

However, when load is applied

b. Stepper Motor failed or seized.

b. Replace Stepper Motor.

3.6-1

 

 

output voltage drops.

c. Connection to Stepper Motor

c. Repair or replace connections.

3.6-1

 

 

 

Motor broken or disconnected.

 

 

 

 

 

d. Stepper Motor not properly

d. Reconnect Stepper Motor.

3.6-1

 

 

 

connected.

 

 

 

 

 

 

 

 

 

 

4. Engine does not accelerate

a. Carburetor linkage sticking

a. Repair sticking throttle.

3.4-3

 

 

when load is applied.

with throttle stuck closed.

 

 

 

 

 

b. Stepper Motor failed or seized.

b. Replace Stepper Motor.

3.6-1

 

 

 

c. Stepper Motor not properly

c. Reconnect Stepper Motor.

3.6-1

 

 

 

connected.

 

 

 

 

 

 

 

 

 

 

5. Engine speed and AC output

a. Stepper Motor failure.

a. Replace Stepper Motor.

3.6-1

 

 

voltage erratic under constant

b. Connection to Stepper Motor

b. Repair or replace connections.

3.6-1

 

 

load. AC output does not turn

broken or disconnected.

 

 

 

 

off intermittently.

c. Stepper Motor not properly

c. Reconnect Stepper Motor.

3.6-1

 

 

 

connected

 

 

 

 

 

 

 

 

 

 

6. Engine starts but Stepper

a. Stator Timing winding is open.

a. Repair/replace bad wire(s)

1.5-2

 

 

Motor does not move. Shut down

 

TIM1/TIM2 or replace Stator.

 

 

 

occurs after several seconds.

b. Timing winding in Stator shorted

b. Replace Stator.

1.5-2

 

 

 

to ground.

 

 

 

 

 

 

 

 

 

Page 7.1-1

Page 109
Image 109
Generac Power Systems 941-2, 940-2 service manual Troubleshooting Reference Chart, Problem Possible Cause Remedy

941-2, 940-2 specifications

Generac Power Systems has established a strong reputation in the field of backup power solutions, particularly with its innovative products like the Generac 940-2 and 941-2 generator systems. These generators are designed to provide reliable power during emergencies, ensuring that homes and businesses can maintain operations seamlessly when grid power is disrupted.

One of the standout features of the Generac 940-2 and 941-2 models is their robust engine performance. Both generators utilize Generac’s patented engines, known for their durability and efficiency. These engines are built to withstand the most demanding conditions while providing a consistent power output. This reliability is crucial for users who depend on uninterrupted power supply for essential appliances and equipment.

In terms of technologies, the Generac 940-2 and 941-2 are equipped with advanced automatic transfer switch capabilities. This technology allows the generators to automatically start and supply power within seconds of an outage. This quick response time helps to ensure that critical systems remain operational without noticeable interruptions, which is vital for businesses and households alike.

Another important characteristic of these models is their user-friendly interface. The generators come with an intuitive digital controller that provides real-time information on power usage, system status, and maintenance needs. This technology makes it easy for users to monitor their generators and ensure they are always ready for an emergency.

The design of the Generac 940-2 and 941-2 also emphasizes noise reduction and aesthetic appeal. These units are engineered for quieter operation compared to traditional generators, making them suitable for residential areas. Their sleek appearance also fits well with modern home exteriors, enhancing rather than detracting from the property’s visual appeal.

Furthermore, these generators offer flexible fuel options, with the ability to run on natural gas or propane. This versatility allows users to choose the fuel source that best meets their needs, contributing to energy efficiency and lowering overall operating costs.

In summary, the Generac Power Systems 940-2 and 941-2 are exceptional generators that combine powerful performance with innovative technologies. Their automatic transfer switch capabilities, user-friendly controls, noise reduction features, and flexible fuel options make them an excellent choice for anyone seeking reliable backup power solutions. With these generators, users can rest assured knowing they have a dependable energy source ready when they need it most.