Repair Experts for Mitsubishi FR-A240(E) and FR-A440(E) General Purpose Inverter Units

Here at Precision Zone, one of our specialties is the repair services of Mitsubishi general purpose inverter units. One of the series that we often work on is the FR-A220(E) and FR-A240(E) series.

Mitsubishi offers quite a few different series of general purpose inverters and one of their more popular options is this FR-A220(E) and FR-A240(E) series. These units are offered in 200VAC and 400VAC variants, designated in the model number by the FR-A220 for 200V or FR-A240 for the 400V option. This inverter series has sizes ranging from 0.4kW (0.5 HP) up to a 55kW (75 HP) and has an optional parameter unit, which is standard for units below 11kW ratings. This parameter unit, model FR-PU02E, allows for quick parameter access, easy monitoring functions, and quick accessibility to any alarm faults to speed up the troubleshooting process. From 11kW and above, the parameter unit is not included as standard and is instead an optional addition.

These units offer a few different operation modes which will be determined by the application each unit is installed for. It can be controlled in external operation mode – utilizes external signals as the control method, PU operation mode – uses the parameter unit as the control method, or combined operation mode – allows external signals and the parameter unit to be used as the control method.

When assessing the functionality of a Mitsubishi 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 Mitsubishi FR-A220(E) & FR-A240(E) General Purpose Inverter Drives

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 'P' Terminal 0.45V-0.60V
S 'P' Terminal 0.45V-0.60V
T 'P' Terminal 0.45V-0.60V
'N' Terminal R 0.45V-0.60V
'N' Terminal S 0.45V-0.60V
'N' Terminal T 0.45V-0.60V


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. Module ratings change with drive capacity, so the biggest concern is that each reading is within 10% of one another.

Positive Lead Negative Lead Reading
U 'P' Terminal 0.42V-0.57V
V 'P' Terminal 0.42V-0.57V
W 'P' Terminal 0.42V-0.57V
'N' Terminal U 0.42V-0.57V
'N' Terminal V 0.42V-0.57V
'N' Terminal W 0.42V-0.57V

Common Alarms for the Mitsubishi FR-A220(E)/FR-A240(E) Series

Alarm Code Description Checks
EOC1
EOC2
EOC3
Overcurrent detected during acceleration (EOC1), constant speed (EOC2), or deceleration (EOC3)
  • Check cables for poor insulation
  • Perform magaohm test on motor
  • Use 'Output Module Testing' test to verify modules
  • Check for ground faults
EOu1
EOu2
EOu3
Over voltage detected during acceleration (EOu1), constant speed (EOu2), or deceleration (EOu3)
  • Verify load is not excessive
  • Verify acceleration/deceleration times are not too quick
  • Check input voltage
  • Swap drive out with another, if applicable
EOHT External thermal relay has been switched on. Only applies when external thermal relay input is selected
  • Check motor for signs of overheating
  • Verify connections of thermal sensor
  • Reduce load and check if problem persists
GF Ground fault has occured on the output of unit
  • Check motor or wire for ground fault
  • Check input/output terminals to ground for leakage
  • Replace Drive


For a full list of Mistubishi FR-A220 (E)/FR-A240(E) alarms from the manual:

https://s3.amazonaws.com/Icarus/DOCUMENTS/Mitsubishi_Alarms_Faults_3733.pdf

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 Mitsubishi FR-A024/FR-A044 General Purpose Inverters with Precision Zone

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

Contact Us To Start Your Repair Today!


Recently Repaired Products

Mitsubishi FR-A220-5.5K-U3 image FR-A220-5.5K-U3 is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Leaky Capacitors (Open, Corroded Traces), Bad Capacitor(s), Bad Cooling Fans, Bad Power Section/Board
Series: FR-A220; 200V
Capacity: 5.5kW; 7.5 HP
Parameter Unit: Not installed
Version: North America

Mitsubishi FR-A240-7.5K image FR-A240-7.5K is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Leaky Capacitors (Open, Corroded Traces), No Display, Bad Capacitor(s), Bad Circuit Board Component(s), Bad Cooling Fans, Bad Power Section/Board, Excessive Dirt/Debris
Series: FR-A0240; 400V
Capacity: 7.5kW; 10 HP
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Mitsubishi FR-A220E-7.5K-UL image FR-A220E-7.5K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Precharge Resistor
Series: FR-A220E; 200-230V
Capacity: 7.5kW; 10 HP
Parameter Unit: Not installed
Version: UL listed

Mitsubishi FR-A220-7.5K-U3 image FR-A220-7.5K-U3 is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Capacitor(s), Bad Cooling Fans, Bad Power Section/Board, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
Series: FR-A220; 200V
Capacity: 7.5kW; 10 HP
Parameter Unit: Not installed
Version: North America

Mitsubishi FR-A220E-15K-UL image FR-A220E-15K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Capacitor(s), Bad Control Section/Board, Bad I/O, Leaky Capacitors (Open, Corroded Traces), Missing parts/components
Series: FR-A220E; 200-230V
Capacity: 15kW; 20 HP
Parameter Unit: Not installed
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Mitsubishi FR-A220E-1.5K-UL image FR-A220E-1.5K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Regen Resistor/s, Passed Testing - Highly Recommend Recondition, Leaky Capacitors (Open, Corroded Traces)
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Capacity: 1.5kW; 2HP
Parameter Unit: Not installed
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Mitsubishi FR-A220-7.5K image FR-A220-7.5K is an
Inverter-General Purpose manufactured by Mitsubishi
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Capacity: 7.5kW; 10 HP
Parameter Unit: Not installed
Version: Japanese

Mitsubishi FR-A220-5.5K image FR-A220-5.5K is an
Inverter-General Purpose manufactured by Mitsubishi
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Series: FR-A220; 200V
Capacity: 5.5kW; 7.5 HP
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Mitsubishi FR-A220-3.7K image FR-A220-3.7K is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Capacitor(s), Bad Control Section/Board, Bad Cooling Fans, Bad Gate Section/Board, Bad Regen Resistor/s, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces), No Display
Series: FR-A220; 200V
Capacity: 3.7kW; 5 HP
Parameter Unit: Not installed
Version: Japanese

Mitsubishi FR-A220E-11K-UL image FR-A220E-11K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Capacitor(s), Bad Cooling Fans, Bad Gate Section/Board, Excessive Dirt/Debris, Leaky Capacitors (Open, Corroded Traces)
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Capacity: 11kW; 15 HP
Parameter Unit: Not installed
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Mitsubishi FR-A220E-2.2K-UL image FR-A220E-2.2K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Capacitor(s), Bad Cooling Fans, Leaky Capacitors (Open, Corroded Traces), No Display, Excessive Dirt/Debris
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Capacity: 2.2kW; 3 HP
Parameter Unit: Not installed
Version: UL listed

Mitsubishi FR-A220-7.5K-UL image FR-A220-7.5K-UL is an
Inverter-General Purpose manufactured by Mitsubishi
Discovered issues: Bad Input Diodes/SCRs, Blown Input Power Components
Series: FR-A220; 200V
Capacity: 7.5kW; 10 HP
Parameter Unit: Not installed
Version: UL listed