Inverter-General Purpose Yaskawa CIMR-G7

Our Team Expertly Repairs Yaskawa AC Inverter CIMR-G7 Series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC inverters such as Yaskawa CIMR-G7 Series inverter.

Yaskawa’s G7 drive performance makes it the ideal drive for high performance speed, torque, or position control applications. The G7 allows motor operation at very long cable lengths, with peak voltage being 30% less than conventional. With motor bearing current being typically 50% less than standard inverters, the G7 provides four times the motor bearing life.

The LCD keypad/operator is equipped with local/remote functions, copy feature and 5 lines of display with 16 characters per line. User parameter settings can be recovered at any time via “user initialization” when enabled. Optional Drive Wizard software allows upload/download, as well as graphing and monitoring of Drive parameters from a PC for ease of Drive management.

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 CIMR-G7 SERIES 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
Gf	Ground Fault
OC	Overcurrent
Ol	Overload
RR	Braking Transistor Shorted
UV	Undervoltage
OV	Overvoltage
OH	Overheat
OS	Overspeed Detection
OPE	Parameter Alarms
PF and LF	Phase Loss or Open Phases

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

Recently Repaired Products

CIMR-G7U43P7 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Missing parts/components, Bad Capacitor(s), Bad Cooling Fans, Bad DC Bus Capacitors, Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), Physical Damage to the Drive, May Require Board Replacement
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 380-480V
Motor Capacity: 3.7kW

CIMR-G7U40P7 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad DC Bus Capacitors, Leaky Capacitors (Open, Corroded Traces), Missing parts/components
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 380-480V
Motor Capacity: 0.75kW

CIMR-G7U44P0 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Excessive Dirt/Debris, Missing parts/components, Wrong/corrupted parameters, Bad Control Section/Board, Leaky Capacitors (Open, Corroded Traces), Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Physical Damage to the Drive
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 380-480V
Motor Capacity: 4.0kW

CIMR-G7A23P7 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad Gate Section/Board, Bad Output Transistors/SCRs, Bad Power Section/Board, Bad Wires (Burnt), Blown Input Power Components, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), May Require Board Replacement
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 200-240V
Motor Capacity: 3.7kW

CIMR-G7A2015 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Excessive Dirt/Debris, Physical Damage to the Drive, Bad Output Transistors/SCRs, Bad Gate Section/Board, Bad Magnetic Contactor, Relay, Bad Circuit Board Component(s), Leaky Capacitors (Open, Corroded Traces), Bad Cooling Fans, Bad Fuse
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 200-240V
Motor Capacity: 15kW

CIMR-G7U40P4 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Gate Section/Board, Bad Circuit Board Component(s), Excessive Dirt/Debris, Bad Fuse, Bad DC Bus Capacitors, Leaky Capacitors (Open, Corroded Traces)
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 380-480V
Motor Capacity: 0.4kW

CIMR-G7U4011 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Circuit Board Component(s), Bad Gate Section/Board, Bad Power Section/Board, Multiple signs of previous repair
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 380-480V
Motor Capacity: 11kW

CIMR-G7U27P5 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Bad Regen Section
Drive: CIMR
Series: G7
Specification: UL Specification
Voltage Class: 200-240V
Motor Capacity: 7.5kW

CIMR-G7A2011 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad Magnetic Contactor, Relay, Blown Input Power Components, Excessive Dirt/Debris, May Require Board Replacement, No Display
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 200-240V
Motor Capacity: 11kW

CIMR-G7A4011 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Blown Input Power Components, Bad Fuse, No Display, Bad Input Diodes/SCRs, Bad Power Section/Board
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 380-480V
Motor Capacity: 11kW

CIMR-G7A21P5 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Gate Section/Board, Bad Input Diodes/SCRs, Blown Input Power Components, Leaky Capacitors (Open, Corroded Traces)
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 200-240V
Motor Capacity: 1.5kW

CIMR-G7A40P7 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Fuse, Bad Capacitor(s), Bad Gate Section/Board, Bad Power Section/Board, Leaky Capacitors (Open, Corroded Traces)
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 380-480V
Motor Capacity: 0.75kW

CIMR-G7A25P5 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Circuit Board Component(s), Bad Cooling Fans, Bad Gate Section/Board, Bad Power Section/Board, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
Drive: CIMR
Series: G7
Specification: A
Voltage Class: 200-240V
Motor Capacity: 5.5kW