MTD 31AH5C3F401, 31AH5Q3G401 manual Trouble Shooting, Problem Cause Remedy

Page 15

SECTION 8: TROUBLE SHOOTING

Problem

 

Cause

 

Remedy

 

 

 

 

 

Engine fails to start

1.

Fuel tank empty, or stale fuel.

1.

Fill tank with fresh gasoline.

 

2.

Blocked fuel line.

2.

Clean the fuel line.

 

3.

Choke not in ON position

3.

Move switch to ON position

 

4.

Faulty spark plug.

4.

Clean, adjust gap or replace.

 

5.

Safety key not in ignition switch on engine.

5.

Insert the key fully into the switch.

 

6.

Spark plug wire disconnected.

6.

Connect spark plug wire.

 

7.

Primer button not being used properly.

7.

Refer to the engine manual.

 

8.

Fuel shut-off valve closed.

8.

Open fuel shut-off valve.

Engine runs erratic

1.

Unit running on CHOKE.

1.

Move choke lever to OFF position.

 

2.

Blocked fuel line or stale fuel.

2.

Clean fuel line; fill tank with clean, fresh

 

 

 

 

gasoline.

 

3.

Water or dirt in fuel system.

3.

Drain fuel tank and carburetor. Refill with

 

 

 

 

fresh fuel.

 

4.

Carburetor out of adjustment.

4.

Refer to the engine manual.

Loss of power

1.

Spark plug wire loose.

1.

Connect and tighten spark plug wire.

 

2.

Gas cap vent hole plugged.

2.

Remove ice and snow from gas cap. Be

 

 

 

 

certain vent hole is clear.

 

3.

Exhaust port plugged.

3.

Refer to the engine manual.

Engine overheats

1.

Carburetor not adjusted properly.

1.

Refer to the engine manual or have the

 

 

 

 

carburetor adjusted by an authorized

 

 

 

 

engine service dealer.

Excessive vibration

1.

Loose parts or damaged auger.

1.

Stop engine immediately and disconnect

 

 

 

 

spark plug wire. Tighten all bolts and nuts. If

 

 

 

 

vibration continues, have unit serviced by

 

 

 

 

an authorized service dealer.

Unit fails

1.

Traction control cable in need of adjustment.

1.

Adjust traction control cable. Refer to

to propel itself

 

 

 

Adjustment Section.

 

2.

Drive belt loose or damaged.

2.

Replace drive belt. Refer to Servicing

 

 

 

 

Section.

Unit fails

1.

Discharge chute clogged.

1.

Stop engine immediately and disconnect

to discharge snow

 

 

 

spark plug wire. Clean discharge chute and

 

 

 

 

inside of auger housing.

 

2.

Foreign object lodged in auger.

2.

Stop engine immediately and disconnect

 

 

 

 

spark plug wire. Remove object from auger.

 

3.

Auger control cable in need of adjustment.

3.

Refer to Final Adjustments in Assembly

 

 

 

 

Section.

 

4.

Auger belt loose or damaged.

4.

Refer to the Servicing Section.

 

5.

Shear bolt(s) sheared.

5.

Replace shear bolt(s).

Electric chute fails to

1.

Loose electrical connections.

1.

Make sure all connections are tight and fully

turn

 

 

 

installed.

 

2.

Blown Fuse.

2.

Replace with #5A fuse. The fuse is under

 

 

 

 

handle panel near switch connector.

Electric chute turns in

1.

The switch connector is installed backwards

1.

Unplug the switch connector under the

opposite direction of

 

 

 

handle panel. Turn connector 180° and

the switch

 

 

 

reconnect.

Heated grips are not

1.

Loose electrical connections.

1.

Under the handle panel, check connections

creating heat

 

 

 

from the handles to the wiring harness.

 

2.

Blown fuse.

2.

Replace with #5A fuse. The fuse is under

 

 

 

 

handle panel near switch connector.

 

3.

Faulty grip. If one heated grip fails, both grips

3.

Have the grips checked at an authorized

 

 

will not function.

 

service dealer.

15

Image 15
Contents OPERATOR’S Manual Table of Contents Operation Important Safe Operation PracticesTraining PreparationMaintenance And Storage Loose Parts AssemblyAssembling Your Snow Thrower UnpackingTraction Control and Shift Lever Adjustment Final AdjustmentsAuger Control Adjustment Skid Shoe AdjustmentSkid Shoe Know Your Snow ThrowerChute Tilt Control Auger Drive ControlOperating Your Snow Thrower To Engage Augers Recoil StarterTo Stop Engine To Engage Wheel DriveChute Assembly Adjustment Traction Control AdjustmentShift Rod Adjustment Drive Wheels Skid Shoe AdjustmentAuger Control Adjustment Maintaining Your Snow ThrowerAugers Belt Removal And ReplacementServicing Your Snow Thrower EngineDrive Belt Replacing Friction Wheel RubberOff-season Storage Problem Cause Remedy Trouble ShootingPage Part Description Models H5C3F & H5Q3GFor Reference Only 746-0901 Control Cable Models H5C3F & H5Q3G Carriage Bolt, 5/16-18 x Models H5C3F & H5Q3G Flat Washer 3/8 x 1.25 OD Models H5C3F & H5Q3G Dogg Assembly RH Dogg Assembly LH 618-0575 Page Page MANUFACTURER’S Limited Warranty for

31AH5C3F401, 31AH5Q3G401 specifications

The MTD 31AH5Q3G401 and MTD 31AH5C3F401 are advanced power MOSFETs designed for various high-efficiency applications. These components are notable for their superior performance in energy conversion and management, making them ideal for use in automotive, industrial, and consumer electronics sectors.

One of the main features of the MTD 31AH5Q3G401 is its low on-resistance (Rds(on)), which significantly contributes to enhanced energy efficiency. Low Rds(on) translates to lower conduction losses during operation, leading to reduced heat generation. This characteristic is crucial in applications where thermal management is a concern, allowing designers to minimize the size of heat sinks and cooling systems.

The MTD 31AH5C3F401 complements this with a fast switching speed, which is essential for high-frequency applications such as switch-mode power supplies (SMPS) and DC-DC converters. The rapid transition from on to off state results in decreased switching losses, allowing for higher overall efficiency in power conversion processes.

Both models utilize a robust silicon technology that enhances their reliability and durability under various operational conditions. Their maximum voltage ratings can easily accommodate voltage transients encountered in automotive applications, ensuring they can handle high-stress environments without compromising performance.

In terms of packaging, the MTD 31AH5Q3G401 and 31AH5C3F401 are available in compact forms, enabling designers to save space on PCBs while maintaining a high power density. The integration of thermal management features within the package reduces thermal resistance, further aiding in effective heat dissipation, which is critical in prolonged use.

A common characteristic of both devices is their ability to operate in a wide range of temperatures, which makes them suitable for both outdoor and indoor applications. They are capable of delivering reliable performance across different environmental conditions, enhancing their usability in various sectors.

In summary, the MTD 31AH5Q3G401 and 31AH5C3F401 are exemplary components featuring low on-resistance, fast switching capabilities, robust silicon technology, and compact packaging. These attributes position them as ideal choices for designers looking to enhance the efficiency and reliability of their electronic systems while managing thermal challenges effectively. With their versatility and strong performance metrics, these MOSFETs are set to play a vital role in the future of power electronics.