Our Team Expertly Repairs Magnetek Impulse G and VG AC Crane Inverter

Precision Zone specializes in Magnetek product repairs servicing a wide range of AC crane inverters such as Magnetek Impulse G+/VG+ inverter.

The Impulse G+/VG+ crane inverter is an adjustable frequency motor control utilizing IGBT output transistors and 16 bit microprocessor digital control. Adjustments and modifications are easily made using the built-in digital operator. Hardware and software have been specifically designed for the application to crane, hoist and monorail systems.

When assessing the functionality of a drive, our engineering team typically conducts a four-step check:

  • Visual Overview Check
  • Static Test
  • Checks Under Power
  • Alarm Codes Verification

This overview is Precision Zone’s basic troubleshooting process. Once our repair team starts on the job we use specialized, customized test fixtures, Huntron tracker, signal generator, oscilloscope, milli and mega ohm meters and other necessary tools to assure quality repair. Most importantly, every repair is fully tested in custom-built simulators under load to replicate real-life working environment. Precision Zone goes as far as using heat chamber and overnight dynamic testing to guarantee performance of the repaired product when it comes back to the customer.

REPAIR PROCESS FOR IMPULSE G+/VG+ AC CRANE INVERTER

Visual Overview Check

When conducting a visual check, the technician inspects the drive for any mechanical damage to the drive and print circuit boards. Then the team proceeds to verify connections are tight and correct inside the drive and there are no loose screws, wires or particles. Additionally, we look for any burn marks anywhere on the components or chassis. During the visual inspection technical team notes excessive dirt on cooling components and records clogged heatsink.

Static Test Basic

Precision Zone repair technicians use digital multimeter with diode testing capabilities and resistance measurement to conduct a static test. In the instance of Diode testing, our team is looking to check input and output modules.

Using your digital multimeter check the DC buss and make sure the DC buss has been discharged.

Input Modules Testing

Multimeter Positive Lead Negative Side of the DC Bus
Multimeter Negative Lead L1 L2 L3
Diode Check Approximately 0.2-1.0 V for each phase
Multimeter Positive Lead L1 L2 L3
Multimeter Negative Lead Positive Side of the DC Buss
Diode Check Approximately 0.2-1.0 V for each phase

Output Modules Testing

Multimeter Positive Lead U V W
Multimeter Negative Lead Positive Side of the DC Buss
Diode Check Approximately 0.2-1.0 V for each phase
Multimeter Positive Lead Negative Side of the DC Buss
Multimeter Negative Lead U V W
Diode Check Approximately 0.2-1.0 V for each phase

We verify capacitor value using capacitor meter and examine functionality of circuit breakers and contactors in the drive.

Alarm Codes Troubleshooting

The alarms on the drive are displayed through digital operator located on the front of the inverter. The codes displayed are:

Alarm Code Code Type
Uv1, 2 and 3 Undervoltage
OV Overvoltage
GF Ground Fault
ol1, 2, and 3 Overload
RR Braking Transistor
CPF Control Circuit
oh1 and oh2 Overheat

The majority of these alarms can be triggered if there is a fault in the control circuit.





Recently Repaired Products

Magnetek 460AFD7.5-G+ image 460AFD7.5-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Capacitor(s), Bad Control Section/Board, Bad Cooling Fans, Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Bad Power Section/Board, Leaky Capacitors (Open, Corroded Traces)
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 7.5HP
Series: Electromotive Impulse G+

Magnetek 460AFD10-G+ image 460AFD10-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Capacitor(s), Bad Control Section/Board, Bad Cooling Fans, Bad Power Section/Board, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), No Display, Bad Wires (Burnt), Blown Circuit Board (Through Hole), Physical Damage to the Circuit Board/s
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 10HP
Series: Electromotive Impulse G+

Magnetek 460AFD15-G+ image 460AFD15-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Capacitor(s), Bad Control Section/Board
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 15HP
Series: Electromotive Impulse G+

Magnetek 460AFD40-VG+ image 460AFD40-VG+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: No Display
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 40HP
Series: Electromotive Impulse VG+

Magnetek 230AFD20-G+ image 230AFD20-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Control Section/Board, Leaky Capacitors (Open, Corroded Traces)
Input Voltage: 230V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 20HP
Series: Electromotive Impulse G+

Magnetek 460AFD5-G+ image 460AFD5-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Leaky Capacitors (Open, Corroded Traces)
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 5HP
Series: Electromotive Impulse G+

Magnetek 460AFD100-G+ image 460AFD100-G+ is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Control Section/Board, Bad Gate Section/Board, Leaky Capacitors (Open, Corroded Traces)
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 100HP
Series: Electromotive Impulse G+

Magnetek 460AFD30-VG+ image 460AFD30-VG+ is an
Inverter-Crane manufactured by Magnetek
Input Voltage: 460V
Drive Type: Adjustable Frequency Drive
Rated Horsepower: 30HP
Series: Electromotive Impulse VG+