Inverter-General Purpose Yaskawa CIMR-P7

Our Team Expertly Repairs Yaskawa AC Inverter CIMR-P7 Series

Precision Zone specializes in Yaskawa product repairs servicing a wide range of AC inverters such as Yaskawa CIMR- P7 Series inverter.

Yaskawa’s P7 drive performance makes it the ideal drive for high performance speed, torque, or position control applications. The P7 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 P7 provides four times the motor bearing life.

The LCD keypad/operator is equipped with local/remote functions, copy feature, 7 language choices, 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-P7 SERIES INVERTER DRIVE

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
OL1 and OL2	Overload
RR	Braking Transistor Shorted
ERR	Control Board Hardware Failure
UV	Undervoltage
OV	Overvoltage
OH and OH2	Overheat
OS	Overspeed Detection
OPE	Parameter Alarms
PF and PH	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-P7U4090 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Circuit Board Component(s), Bad Cooling Fans, Bad Digital Operator, Bad Fuse, Bad Gate Section/Board, Bad Magnetic Contactor, Relay, Bad Output Transistors/SCRs, Bad Precharge Resistor, Leaky Capacitors (Open, Corroded Traces), May Require Board Replacement, Missing parts/components
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 480V; 90kW

CIMR-P7U27P5 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Brake Transistor (Regen), Bad Capacitor(s), Bad Circuit Board Component(s), Bad Magnetic Contactor, Relay, Leaky Capacitors (Open, Corroded Traces), Physical Damage to the Drive, Bad Cooling Fans
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 208-240V; 7.5kW

CIMR-P7U4045 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Leaky Capacitors (Open, Corroded Traces), Bad Cooling Fans, Bad Fuse, Bad Gate Section/Board, Bad Output Transistors/SCRs, Multiple signs of previous repair
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 480V; 45kW

CIMR-P7U4030 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Circuit Board Component(s), Bad Cooling Fans, Bad Fuse, Bad Gate Section/Board, Bad Magnetic Contactor, Relay, Bad Output Transistors/SCRs, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 480V; 30kW

CIMR-P7U4075 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Bad Capacitor(s), Bad Cooling Fans, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), Bad Circuit Board Component(s), Bad Magnetic Contactor, Relay
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 480V; 75kW

CIMR-P7U2011 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), Missing parts/components
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 208-240V; 11kW

CIMR-P7U4024 is an
Inverter-General Purpose manufactured by Yaskawa
Discovered issues: Missing parts/components, Bad Capacitor(s), Bad Magnetic Contactor, Relay, Bad Cooling Fans, Excessive Dirt/Debris, Physical Damage to the Drive, Bad Input Diodes/SCRs
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 480V; 24kW

CIMR-P7U2018 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 Input Diodes/SCRs, Bad Power Section/Board, Bad Wires (Burnt), Excessive Dirt/Debris, May Require Board Replacement
Drive: AC Drive
Series: P7
Specification: UL Specification
Rated Input Voltage & Motor Capacity: 208-240V; 18kW