Our Team Expertly Repairs Magnetek Impulse G and VG Series 4 AC Crane Inverter

Precision Zone specializes in Magnetek product repairs servicing a wide range of AC Crane Inverters such as Magnetek Impulse G+/VG+ Series 4.

The Impulse G+/VG+ Series 4 crane inverter is the fourth generation in performance that makes it an ideal drive for high performance speed, torque, or position control applications. It is a world-class compact current vector drive that defines a new world standard. Hardware and software have been specifically designed for the application to crane, hoist and monorail systems. The LCD keypad/operator is equipped with local/remote functions, copy feature, and 5 lines of display with 16 characters per line. Changing parameters, using monitoring modes, reading alarms and operating the drive is easily done from the keypad.

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+ SERIES 4 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
LF Output Phase Loss
Oc Overcurrent
oH and oH 1 Heatsink Overheat
oLH3 and 4 Motor Overheat
ov Overvoltage
PF Input Phase Loss
CPF Alarms are Control Board Faults

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





Recently Repaired Products

Magnetek 4024-VG+S4 image 4024-VG+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Control Section/Board, Bad Orientation/Encoder Section/Board
Input Voltage: 460V
Rated Output Current: 24A
Series: Electromotive Impulse VG+ Series 4

Magnetek 4018-G+S4 image 4018-G+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Leaky Capacitors (Open, Corroded Traces), Bad Capacitor(s), Bad Cooling Fans, Bad Output Transistors/SCRs
Input Voltage: 460V
Rated Output Current: 18A
Series: Electromotive Impulse G+ Series 4

Magnetek 4150-VG+S4 image 4150-VG+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Circuit Board Component(s), Bad Gate Section/Board, Bad Magnetic Contactor, Relay, Bad Output Transistors/SCRs, Bad Precharge Resistor, Bad Wires (Burnt), Blown Circuit Board (Through Hole)
Input Voltage: 460V
Rated Output Current: 150A
Series: Electromotive Impulse VG+ Series 4

Magnetek 4045-VG+S4 image 4045-VG+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Fuse, Bad Output Transistors/SCRs
Input Voltage: 460V
Rated Output Current: 45A
Series: Electromotive Impulse VG+ Series 4

Magnetek 4045-G+S4 image 4045-G+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Output Transistors/SCRs, Bad Regen Resistor/s
Input Voltage: 460V
Rated Output Current: 45A
Series: Electromotive Impulse G+ Series 4

Magnetek 4039-VG+S4 image 4039-VG+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Brake Transistor (Regen), Bad Circuit Board Component(s), Bad Input Diodes/SCRs, Bad Output Transistors/SCRs, Blown Input Power Components
Input Voltage: 460V
Rated Output Current: 39A
Series: Electromotive Impulse VG+ Series 4

Magnetek 4014-G+S4 image 4014-G+S4 is an
Inverter-Crane manufactured by Magnetek
Discovered issues: Bad Circuit Board Component(s), Bad Input Diodes/SCRs, Bad Output Transistors/SCRs
Input Voltage: 460V
Rated Output Current: 14A
Series: Electromotive Impulse G+ Series 4