Section 7

DIAGNOSTIC TESTS

“Infinity” should be measured. Set the Start-Stop Switch to “START”. The meter should now read “Continuity”.

Short to Ground:

3.Set the VOM to measure resistance (“R x 1” scale). Disconnect Wire 56 from the Starter Contactor Relay (SCR). Connect one meter test lead to the SCR terminal from which Wire 56 was just removed. Connect the other meter test lead to a clean frame ground. Starter Contactor Relay coil resistance of 155 ohms should be measured. If “Continuity” is measured a short to ground exists.

Note: Current draw of the Starter Contactor Relay coil at nominal voltage is approximately 80ma.

RESULTS:

1.If “Continuity” is not measured in Step 1, repair or replace Wire 0 between the Starter Contactor Relay and the ground terminal.

2.If “Continuity” was not measured in Step 2 when the Start-Stop switch was activated to “start”, replace the Starter Contactor Relay.

3.If “Continuity” is measured in Step 2, go to Test 23.

Test 23 – Check Starter Contactor

DISCUSSION:

The Starter Contactor (SC) must energize and it’s heavy duty contacts must close or the engine will not crank. This test will determine if the Starter Contactor is in working order. The Starter Contactor is connect- ed to the Starter Motor (see Figure 7-20).

 

STARTER

16

 

 

 

SWITCH

50

 

 

BATTERY

30

 

12V

 

 

CONNECTING

DIAGRAM

 

PERMANENT MAGNET

STARTER

STEP 1

TEST POINT

CONTACTOR

 

 

STEP 2

 

TEST POINT

STARTER

 

MOTOR

 

Figure 7-20. – The Starter Contactor (SC)

PROCEDURE:

1.Carefully inspect the starter motor cable that runs from the Battery to the Starter Motor. Cable con- nections should be clean and tight. If connections are dirty or corroded, remove cable and clean cable terminals and studs. Replace any cable that is defective or badly corroded. Set the VOM to measure DC voltage. Connect the positive

(+)meter test lead to the Starter Contactor stud that the battery cable is connected to. Connect the negative (-) meter test lead to a clean frame ground. Battery voltage should be measured (see Figure 7-20, STEP 1 TEST POINT).

2.Set the VOM to measure DC voltage. Disconnect Wire 16 from the Starter Contactor. Connect the positive (+) meter test lead to Wire 16. Connect the negative (-) meter test lead to a clean frame ground. Set the Start-Stop Switch to “Start”. Battery voltage should be indicated. Reconnect Wire 16 to the Starter Contactor.

3.Set the VOM to measure DC voltage. Connect the positive (+) meter test lead to the Starter Contactor stud that has the small jumper wire connected to the Starter. Connect the negative (-) meter test lead to a clean frame ground. Set the Start-Stop Switch to “Start”. Battery volt- age should be measured (see Figure 7-20, STEP 2 TEST POINT).

RESULTS:

1.If battery voltage was not measured in Step 1, repeat Test 17.

2.If battery voltage was not measured in Step 2,

repair or replace Wire 16 between the Starter Contactor Relay (SCR) and the Starter Contactor (SC).

3If battery voltage was measured in Step 1, but not in Step 3, replace the Starter Contactor.

4.If battery voltage was measured in Step 3 but the engine still does not crank, go to Test 24.

Test 24 – Check Starter Motor

Conditions Affecting Starter Motor Performance:

1.A binding or seizing condition in the Starter Motor bearings.

2.A shorted, open or grounded armature.

a.Shorted, armature (wire insulation worn and wires touching one another). Will be indicated by low or no RPM.

b.Open armature (wire broken) will be indicated by low or no RPM and excessive current draw.

c.Grounded armature (wire insulation worn and wire touching armature lamination or shaft). Will

Page 48

Page 49 Page 51
Page 50
Image 50
Generac Power Systems 5413, 5412, 5411, 5415, 5414, 5410 manual Test 23 Check Starter Contactor, Test 24 Check Starter Motor
Page 49 Page 51

5410, 5414, 5415, 5413, 5411 specifications

Generac Power Systems has established itself as a leading manufacturer of backup power solutions, particularly known for its range of generators designed for both residential and commercial use. Among their noteworthy products are the Generac models 5412, 5411, 5413, 5415, and 5414. Each of these generators showcases innovative technologies and features that enhance reliability, efficiency, and ease of use.

The Generac 5412 is a versatile model equipped with a robust 10 kW output, making it suitable for powering essential home appliances during outages. It operates using a 1.0 L engine that runs on natural gas or propane, providing flexibility in fuel options. The Quiet-Test feature is a notable characteristic, as it allows for a self-test at a reduced volume, minimizing noise disruptions during routine checks.

Moving to the Generac 5411, this generator offers a higher output capacity of 13 kW. It integrates advanced load management technology, which ensures that power is allocated efficiently among connected devices. This model also features a Mobile Link remote monitoring system, enabling users to check generator status and performance from anywhere via a smartphone app.

The Generac 5413 is tailored for larger residential needs, delivering an impressive 16 kW output. It boasts a durable all-weather aluminum enclosure designed for longevity against the elements. The 5413's integrated wifi connectivity allows for real-time monitoring and alerts, ensuring that homeowners are always informed of their generator's operating status.

For those seeking a balance of power and efficiency, the Generac 5415 offers 20 kW of output while maintaining a compact design. This model is enriched with the patented G-Flex technology, allowing it to adjust engine speed based on the load requirements, thereby conserving fuel and reducing noise levels. Additionally, the 5415 comes with an intuitive user interface for effortless operation and programming.

Finally, the Generac 5414 rounds out the lineup with its strong 24 kW capability. This model is particularly known for its Smart Management modules, which facilitate the safe and efficient distribution of power. Its intuitive design also includes a user-friendly control panel for straightforward operation, ensuring that homeowners, regardless of technical expertise, can utilize the system effectively.

In summary, Generac Power Systems’ 5412, 5411, 5413, 5415, and 5414 generators exemplify advanced power technology, tailored for reliability and user convenience. Whether for essential home functions or more extensive power needs, these models provide effective solutions to ensure that homes remain powered during outages.
Top Page Image Contents