YASKAWA VS MINI J7 User Manual Page 132
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- TROUBLESHOOTING
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Protective and Diagnostic Functions Chapter 8-1
8-1 Protective and Diagnostic Functions
8-1-1 Fault Detection (Fatal Error)
The Inverter will detect the following faults if the Inverter or motor burns or the
internal circuitry of the Inverter malfunctions. When the Inverter detects a
fault, the fault code will be displayed on the Digital Operator, the fault contact
output will operate, and the Inverter output will be shut off causing the motor
to coast to a stop. The stopping method can be selected for some faults, and
the selected stopping method will be used with these faults. If a fault has
occurred, refer to the following table to identify and correct the cause of the
fault. Use one of the following methods to reset the fault after restarting the
Inverter. If the operation command is being input, however, the reset signal
will be ignored. Therefore, be sure to reset the fault with the operation
command turned off.
• Turn on the fault reset signal. A multi-function input (n36 to n39) must be
set to 5 (Fault Reset).
• Press the STOP/RESET Key on the Digital Operator.
• Turn the main circuit power supply off and then on again.
Fault Displays and Processing
Fault
display
Fault name and meaning Probable cause and remedy
%c Overcurrent (OC)
The Inverter output current is as
high as or higher than 200% of the
rated output current.
• A short-circuit or ground fault has occurred and at the
Inverter output.
→ Check and correct the motor power cable.
• The V/f setting is incorrect.
→ Reduce the V/f set voltage.
• The motor capacity is too large for the Inverter.
→ Reduce the motor capacity to the maximum permissible motor
capacity.
• The magnetic contactor on the output side of the Inverter has been
opened and closed.
→ Rearrange the sequence so that the magnetic contactor will not
open or close while the Inverter has current output.
• The output circuit of the Inverter is damaged.
→ Replace the Inverter.
%U Overvoltage (OV)
The main circuit DC voltage
has reached the overvoltage
detection level
(200-V models: 410 V DC min.;
400-V models: 820 V DC min.).
• The deceleration time is too short.
→ Increase the deceleration time.
• The power supply voltage is too high.
→ Decrease the voltage so it will be within specifications.
• There is excessive regenerative energy due to overshooting
at the time of acceleration.
→ Suppress the overshooting as much as possible.
uU1 Main circuit undervoltage (UV1)
The main circuit DC voltage has
reached the undervoltage
detection level (200 V DC for the
3G3JV-A2_, 160 V DC for the
3G3JV-AB_, and 400 V DC for the
3G3JV-A4_).
• Power supply to the Inverter has phase loss, power
input terminal screws are loose, or the power cable is
disconnected.
→ Check the above and take necessary countermeasures.
• Incorrect power supply voltage
→ Make sure that the power supply voltage is within
specifications.
• Momentary power interruption has occurred.
→ Use the momentary power interruption compensation
(Set n47 so that the Inverter restarts after power is
restored)
→ Improve the power supply.
• The internal circuitry of the Inverter is damaged.
→Change the Inverter.
- 1
- 1
- Visual Aids 3
- General Precautions 4
- Wiring Precautions 5
- Transportation Precautions 5
- Installation Precautions 5
- Warning Labels 7
- CIMR—J7AZ20P1 8
- About this Manual 9
- Application Considerations 10
- Disclaimers 11
- Table of Contents 13
- CHAPTER 1 15
- Overview 15
- 1-1 Function 16
- 1-2 Nomenclature 17
- Nomenclature Chapter 1-2 18
- Digital Operator 18
- CHAPTER 2 19
- 2-1 Installation 20
- Installation Chapter 2-1 21
- 2-2 Wiring 24
- Wiring Chapter 2-2 25
- Removing the Front Cover 25
- 2-2-2 Terminal Block 26
- Main Circuit Terminals 27
- Control Circuit Terminals 28
- Selecting Input Method 28
- 2-2-3 Standard Connections 30
- Circuit Breaker Capacities 31
- Wiring Example 1 34
- Ground Wiring 37
- Harmonics 38
- Standard Connection 43
- LVD Conformance 45
- CHAPTER 3 47
- 3-1 Nomenclature 48
- 3-2 Outline of Operation 49
- Status Monitor 51
- Example of Paramter Settings 53
- CHAPTER 4 55
- Test Run 55
- Chapter 4 56
- 4-1 Procedure for Test Run 57
- 4-2 Operation Example 59
- 4-2-3 Initializing Parameters 60
- 4-2-5 No-load Operation 61
- 4-2-6 Actual Load Operation 62
- CHAPTER 5 63
- Basic Operation 63
- 5-1 Initial Settings 64
- 5-2 V/f Control 65
- V/f Control Chapter 5-2 66
- Basic Conecpt 67
- 5-9 Multi-function I/0 77
- Set Values 78
- Forward (reverse) 80
- RUN command 80
- 5-9-2 Multi-function Output 81
- 5-10 Analog Monitor Output 82
- CHAPTER 6 83
- Advanced Operation 83
- 6-3 Stall Prevention Function 87
- 6-7 Other Functions 93
- 6-7-4 Fault Retry (n48) 95
- Frequency Detection 97
- Other Functions Chapter 6-7 100
- 6-7-8 Error History (n78) 101
- CHAPTER 7 103
- Communications 103
- 7-1-1 Overview 104
- 7-1-2 External Dimensions 104
- 7-1-3 Names of Parts 105
- 7-1-4 Mouting Procedure 105
- Connector 106
- 7-2 Inverter Settings 107
- Inverter Settings Chapter 7-2 108
- Slave Address (n70) 108
- Send Wait Time Setting (n73) 109
- RTS Control Selection (n74) 109
- Communications Format 112
- Message Interval 112
- Message Data Configuration 112
- Slave Address 113
- Function Code 113
- Communications Data 113
- Error Check 114
- 7-4 DSR Message and Response 115
- Response 116
- Example of Data Read 116
- Settings and Response 117
- Example of Loop-back Test 121
- 7-5 Enter Command 122
- Converting the Register Data 123
- Bit reversed 124
- 1 is added 124
- 7-7-1 I/O Function 125
- 7-7-2 Monitor Functions 126
- Errors and Remedies 129
- 7-9 Self-diagnostic Test 130
- CHAPTER 8 131
- Fault Displays and Processing 132
- 8-2 Troubleshooting 137
- 8-2-6 Motor Burns 139
- 8-2-9 Mechanical Vibration 140
- 8-2-13 Inverter Does Not Run 141
- Daily Inspection 142
- Periodic Inspection 142
- Periodic Maintenance Parts 143
- Replacement of Cooling Fan 143
- CHAPTER 9 145
- Specifications 145
- 9-1 Inverter Specifications 146
- 9-2-1 List of Accessories 149
- 9-2-2 Adapter Panel 150
- 9-2-4 Fan Unit 151
- 9-2-5 Digital Operator 152
- 9-2-6 Digital Operator Case 153
- 9-2-8 DC Reactor 153
- 3G3IV-PEZZ08122_ 154
- Applicable Model 154
- External Dimensions (mm) 154
- 9-2-10 AC Reactor 155
- 9-3 Option Specifications 156
- External Dimensions 157
- CHAPTER 10 159
- List of Parameters 159
- List of Parameters Chapter 10 160
- CHAPTER 11 173
- Revision History 176
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