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5.1 Errors (Alarms)
PROTECTIVE FUNCTIONS
163
5 PROTECTIVE FUNCTIONS
5.1 Errors (Alarms)
If any fault has occurred in the inverter, the corresponding protective function is activated to bring the inverter
to an alarm stop and automatically give the corresponding error (alarm) indication on the PU display.
If your fault does not correspond to any of the following errors or if you have any other problem, please
contact your sales representative.
•
When the protective function is activated, take the corresponding corrective action, then reset the inverter,
and resume operation.
•
Resetting method
When the protective function is activated and the inverter has stopped its output, the inverter output is kept
stopped (and the motor is coasted to a stop). Unless reset, therefore, the inverter cannot restart. To reset,
use any of the following methods: switch power off once, then on again; short reset terminal RES-SD for
more than 0.1 seconds, then open; or press the
STOP
RESET
key of the operation panel or parameter unit (use
the help function of the parameter unit). If RES-SD are kept shorted, the operation panel shows "Err." and
the parameter unit indicates that the inverter is being reset.
5.1.1 Error (alarm) definitions
(
1
)
Major faults
When the protective function is activated, the inverter output is shut off and the alarm is output.
Operation Panel
Indication
E.OC1
FR-PU04
OC During Acc
Name
Overcurrent shut-off during acceleration
Description
When the inverter output current reaches or exceeds approximately 150% of the
rated current during acceleration, the protective circuit is activated to stop the
inverter output.
This indication also appears when the start signal is input with power supplied to
only the R1 <L
11
> and S1 <L
21
> terminals.
Check point
Check for sudden acceleration.
Check for output short circuit.
Check that main circuit power (R, S, T <L
1
, L
2
, L
3
>) is supplied.
Corrective action
•
Increase the acceleration time.
•
If "E.OC1" is always lit at a start, disconnect the motor once and then start the
inverter. If "E.OC1" is still lit, contact your sales representative.
•
Supply main circuit power (R, S, T <L
1
, L
2
, L
3
>).
Operation Panel
Indication
E.OC2
FR-PU04
Stedy Spd OC
Name
Overcurrent shut-off during constant speed
Description
When the inverter output current reaches or exceeds approximately 150% of the
rated current during constant speed, the protective circuit is activated to stop the
inverter output.
Check point
Check for sudden load change.
Check for output short circuit.
Corrective action
Keep load stable.
- FR-F520-0.75K to 55K 1
- FR-F540-0.75K to 55K(-EC) 1
- FR-F520-11K to 55K-NA 1
- FR-F540-11K to 55K-NA 1
- SAFETY INSTRUCTIONS 3
- 1. Electric Shock Prevention 3
- 2. Fire Prevention 3
- 3. Injury Prevention 3
- 4. Additional instructions 4
- (2) Wiring 4
- (3) Trial run 4
- (4) Operation 4
- (5) Emergency stop 5
- (7) Disposing of the inverter 5
- (8) General instructions 5
- CONTENTS 6
- Contents 6
- 6 SPECIFICATIONS 184 9
- 7 OPTIONS 192 9
- APPENDICES 195 9
- CHAPTER 1 10
- 1.1 Pre-Operation Information 11
- 1.2 Basic Configuration 12
- 1.3 Structure 13
- Front cover 14
- Inverter 14
- INSTALLATION AND WIRING 17
- 2.1 Installation 18
- 2.2 Wiring 20
- Notes on Grounding 24
- EC version 30
- NA and Japanese version 30
- Twin contact 38
- Low-level signal contacts 38
- 2.3 Other wiring 39
- 2.3.6 Peripheral devices 48
- 2.3.9 Earthing (EC version) 53
- CHAPTER 3 54
- OPERATION/CONTROL 54
- 3.1 Pre-Operation Information 55
- 3.1.2 Power on 57
- 3.2 Operation Panel 58
- 3.2.3 Monitoring 59
- 3.2.4 Frequency setting 59
- 3.2.6 Operation mode 61
- 3.2.7 Help mode 61
- 3.2.8 Copy mode 63
- 3.3.1 Parameter checking 64
- Simple mode parameter 65
- 3.3.2 Main parameter settings 66
- 3.4 Operation 68
- CONTROL PANEL 69
- 3.4.3 PU operation mode 70
- 3.4.4 Combined operation mode 71
- CHAPTER 4 72
- PARAMETERS 72
- 4 PARAMETERS 73
- 4.1 Parameter List 73
- Output frequency (Hz) 81
- Output voltage 81
- (Pr. 52 to Pr. 54, Pr. 158) 99
- With alarm 100
- PARAMETERS 101
- 4.2.29 Applied motor (Pr. 71) 110
- 4.2.31 Voltage input (Pr. 73) 112
- (Pr. 75) 113
- Time (Minute) 131
- Minute (Second) 131
- (Pr. 135 to Pr. 139) 140
- Set time (s) 149
- Overload status (OL output) 149
- OL output signal 149
- (Pr. 170, Pr. 171) 151
- Pr. 516 Pr. 504 163
- Pr. 502 + Pr. 503 163
- (Pr. 902 to Pr. 905) 170
- MON EXT PU 172
- PROTECTIVE FUNCTIONS 176
- 5 PROTECTIVE FUNCTIONS 177
- 5.1 Errors (Alarms) 177
- (2) Minor fault 184
- (3) Warnings 184
- 5.1.4 Alarm code output 187
- 5.1.5 Resetting the inverter 187
- 5.2 Troubleshooting 188
- 5.3.2 Check items 190
- 5.3.3 Periodic inspection 190
- 5.3.5 Pressure test 191
- <Preparation> 193
- <Checking method> 193
- Fan cover 194
- Fan connectors 194
- <Example: FR-F540-5.5K> 194
- 5.3.8 Inverter replacement 195
- CHAPTER 6 198
- SPECIFICATIONS 198
- 6 SPECIFICATIONS 199
- 6.1 Standard Specifications 199
- 6.1.2 Common specifications 201
- 95 (3.74) 203
- CHAPTER 7 207
- 7 OPTIONS 208
- 7.1 Option List 208
- • Inboard options 210
- APPENDICES 211
- Appendix 1 Data Code List 212
- REVISIONS 217
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