Filter
Top Products
Chapter 6 - Troubleshooting & Maintenance
91
Display
Protective
Function
Description
EEPROM Error 1 The keypad EEPROM has a fault causing parameter read/write error.
EEPROM Error 2 The ROM version for the inverter and keypad are different.
Inverter H/W Fault
When an error occurs to the control circuitry of the inverter a fault signal is sent. There are
the CPU error, the EEP error, Fan Fault, Ground Fault and NTC Damage for this fault
CPU Error The CPU has a fault.
EEP Error The EEPROM on inverter main board has a fault.
Fan fault The cooling fan does not rotate.
Ground Fault
A ground fault occurs. Inverter checks ground fault only when power is ON and run
command is entered.
NTC Damage NTC is damaged.
Note: “HW” is displayed when “FAN”, “EEP”, “CPU2”, “GF”, or “NTC” faults occur. Use “FUNC”, “UP”, “UP”, “UP” keys to see the detailed
fault contents.
6.1.1 Operating Method and Fault Display when Frequency Reference is Lost
I/O-48 [Operating Method when Frequency Reference is Lost]
I/O-48 Setting Function Description
0 (None) Continues operation when the frequency reference is lost (Factory Default)
1 (FreeRun) Free runs and stops when the frequency reference is lost.
2 (Stop) Decelerates and stops when the frequency reference is lost.
Keypad Display when Analog Frequency Reference is Lost
Keypad Display Contents
_ _ _ L
Displayed when V1 analog frequency reference is lost.
_ _ _ L
Displayed when I analog frequency reference is lost.
Fault Contents and Operating Status Prior to Fault
1) Present Fault Contents (Ex: Over Current)
Code Display Description
DRV-7 OC Displays the present fault contents (Over current)
Check the fault contents before pressing the reset key. Press the [FUNC] key and then use the [(Up)],
[(Down)] keys to check the operating information (output frequency, output current, acceleration,
deceleration, constant speed status) prior to fault. Press the [FUNC] key to exit. The inverter will store the
CAUTION
Inverter outputs voltage for 20msec to check Ground Fault.