Precision Zone Expertly Repairs Inverter-General Purpose Yaskawa Z1000 (CIMR-Z)

Here at Precision Zone, one of our specialties is the repair services of general purpose inverter drive units. One series that we often work on is the Z100 series which is offered through Yaskawa.

This series of inverter was designed with automated building applications in mind – fans, pumps, cooling units, etc. – and has the options for a 200VAC input source as well as an option for a 460VAC input. The 200V option comes in output ratings which range from 7.5HP (11 amp) and can go up to 150HP (396 amps). The 460V input option has a slightly larger spectrum of outputs and will run from 3HP (4.8 amps) all the way up to 500HP (590 amps)!

The standard enclosure type is IP20/NEMA Type 1 which is designed strictly for indoor use. A digital operator is also provided on the front panel of these units which allows easy and quick parameter reading or checking, access to monitoring functions of the unit, and shows fault codes to quickly assist with pinpointing the troubled area of the drive if an issue does arise.

When assessing the functionality of a Yaskawa General-Purpose Inverter, our expert repair team of engineers and technicians conducts a four-step check:

    1. Visual Overview
    2. Static Test
    3. Checks Under Power
    4. Alarm Codes Verification

This overview is Precision Zone’s basic troubleshooting process. Once our repair team starts on the job, we use specialized and customized testing fixtures, Huntron trackers, signal generators, oscilloscopes, milli and megaohm meters, as well as any other necessary tools we have available to assure quality repair work. Most importantly, every repair is fully tested in our custom-built simulators under load with a motor to replicate real-life working environment.

Precision Zone goes as far as using heating chambers and overnight dynamic testing, when applicable, to guarantee performance of the repaired product when it arrives back with the customer.

Repair Process for Yaskawa Z1000 Series General-Purpose Drive Units

Visual Overview

When conducting a visual check, the technician inspects the drive for any mechanical damage to the drive itself and any printed circuit boards (PCB). The technician then proceeds to verify connections are tight and correct inside the drive and there are no loose screws, wires or debris. Additionally, the unit is checked for any burn marks on the components, PCBs or chassis. During the visual inspection, excessive dirt on cooling components is noted as well as the functionality of the heat sink.

Basic Static Check

Input Module Testing

The input modules on these units can be tested by use of a digital multimeter with diode checking capabilities. Upon removing the cover, all of these terminals can be located along the terminal strip found within the unit.

Positive Lead Negative Lead Reading
R +M 0.41V-0.57V
S +M 0.41V-0.57V
T +M 0.41V-0.57V
-M R 0.41V-0.57V
-M S 0.41V-0.57V
-M T 0.41V-0.57V

Output Module Testing

Using the same type of test as above, the output modules can be checked as well. Our technicians are also equipped with huntron devices further verify their integrity.

Positive Lead Negative Lead Reading
U +M 0.42V-0.54V
V +M 0.42V-0.54V
W +M 0.42V-0.54V
-M U 0.42V-0.54V
-M V 0.42V-0.54V
-M W 0.42V-0.54V

Common Alarms for the Yaskawa Z1000 General-Purpose Inverter Unit

Alarm Code Description Checks
oC Overcurrent has been detected flowing through the drive unit
  • Check cables for poor insulation
  • Perform megohm test on motor
  • Use “Output Module Testing” test to verify modules
  • Check for ground faults
Err EEPROM write error - data cannot be written to the EEPROM
  • Verify parameter settings
  • Cycle power to see if error clears
  • If available, attempt to swap control board or full drive
FAn A failure has been detected with the internal cooling fan or magnetic contactor
  • Cycle power, check if issue persists
  • Verify if fan starts with drive power
  • Swap control board, if possible
CPF## Many CPF alarms can occur which point to a communication or circuit error. The numbers will designate specific areas of interest
  • Power cycle, check if issue persists
  • Swap control board with known working unit
  • Contact repair department, most CPF alarms require repair work

For a full list of Alarms for the Yaskawa Z1000 General-purpose inverter units, please see link to the manual below.

This list of checks for certain alarms is primarily a good starting point and if any further troubleshooting or technical support is needed feel free to contact us via phone or email to get in touch with our experienced tech support team.

Learn the benefit of repairing your Yaskawa inverter units with Precision Zone

  • Quick and Flexible Service
  • Fully Refurbished, not just repaired
  • Decades of Industry Experience
  • Superior Technology Knowledge and Support

Contact Us To Start Your Repair Today!

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