Instruction manual
Table Of Contents
- Preface
- Safety Precautions
- Table of Contents
- Warnings, Cautions and Conformity
- Chapter 1 Drive Model Identification
- Chapter 2 Mounting and Wiring the Inverter
- Chapter 3 Operation using the Keypad
- Chapter 4 Function Codes / Parameters
- Chapter 5 Check Motor Rotation and Direction
- Chapter 6 Speed Reference Command Configuration
- Chapter 7 Operation Method Configuration (Run / Stop)
- Chapter 8 Motor and Application Specific Settings
- Chapter 9 Using PID Control for Constant Flow / Pressure Applications
- Chapter 10 Troubleshooting
- 10.1 Protective Functions
- 10.2 Before Proceeding with Troubleshooting
- 10.3 If Neither an Alarm Code Nor "Light Alarm" Indication Appears on the LED Monitor
- 10.4 If an Alarm Code Appears on the LED
- 10.5 If the “Light Alarm” Indication Appears on the LED Monitor
- 10.6 If an Abnormal Pattern Appears on the LED Monitor except Alarm Codes and "Light Alarm" Indication
- 10.7 If the Inverter is Running on Single-Phase Power
- Chapter 11 Specifications
3-7
3.3.3 Monitoring light alarms
The EQ7 identifies abnormal states in two categories--Alarm and Light alarm. If the former occurs, the inverter
immediately trips; if the latter occurs, the appears on the LED monitor and the "L-ALARM" appears blinking in the
operation guide area on the LCD monitor, but the inverter continues to run without tripping.
Which abnormal states are categorized as a light alarm ("Light alarm" object) should be defined with function codes H81
and H82 beforehand.
Assigning the LALM signal to any one of the digital output terminals with any of function codes E20 to E24 and E27
(data = 98) enables the inverter to output the LALM signal on that terminal upon occurrence of a light alarm.
Figure 3.6 Display of Light Alarm
For details of the light alarms, refer to Chapter 10 "TROUBLESHOOTING."
How to check a light alarm
If a light alarm occurs, the appears on the LED monitor. To check the current light alarm, enter Programming mode
by pressing the key and select LALM1 on Menu #5 "Maintenance Information."
It is also possible to check the last three light alarms by selecting LALM2 (last) to LALM4 (3rd last).
For details of the menu transition of the maintenance information, refer to Section 3.4.6 "Reading maintenance
information."
How to remove the current light alarm
After checking the current light alarm, to switch the LED monitor from the indication back to the running status
display (e.g., output frequency), press the key in Running mode.
If the light alarm has been removed, the "L-ALARM" disappears and the LALM output signal turns OFF. If not (e.g. DC
fan lock), the on the LED monitor disappears so that normal monitoring becomes available, but the "L-ALARM"
remains displayed on the LCD monitor (as shown below) and the LALM output signal remains ON.
Means that a light
alarm has occurred.
Rotational direction
Indicator indexes
Means that a light
alarm has occurred.
Operation guides
Running status
The has
disappeared and the
normal LED monitor is
displayed.
Rotational direction
Indicator indexes
Operation guides
Running status
The operation guides
remain displayed.