N3 Drive Operations Manual
Error Display Codes
85
21.0 Error Display Codes
The following tables describe the error codes that are displayed under fault conditions. They are broken down into five
categories:
·
Unresettable / Unrecoverable errors
·
Errors recoverable both manually and automatically
·
Manually recoverable errors Only
(no auto-restart)
·
Set-up configuration and interface errors
·
Keypad errors
Some of the faults can be reset manually via the
Reset
key, or by an
external reset
command. Certain faults can
also be reset by setting
parameter A018 (Enable Auto Restart). Other faults are
not resettable
. In this case, the
inverter may need total replacement or a part replaced.
21.1
Unresettable / Unrecoverable Errors
Display
Code
Fault
Cause
Remedy
CPF
Program
problem
External noise interference.
(EMI)
Connect a parallel RC
suppressor across the coil of the
magnetic contactor that is
causing the interference.
EPR
EEPROM
problem
Faulty EEPROM
Replace EEPROM
*
-OV-
Overvoltage
while stopped
Voltage detection circuit
Malfunction.
Repair or replace unit.
*
-LV-
Undervoltage
while stopped
1. Input voltage too low.
2. Power resistor or fuse
burned out.
3. Detection circuit
malfunctions.
1. Verify that the input voltage is
correct.
2. Replace the power resistor or
fuse.
3. Repair or replace the inverter.
*
-OH-
The inverter
overheats
while stopped
1. Detection circuit
malfunction.
2. Ambient temperature too
high or poor ventilation.
1. Replace or return the inverter.
2. Improve ventilation conditions.
CTER
Current
transducer
detection error
Current transducer or
circuit error.
Repair or replace unit.
*The Fault relay contact does not operate with these error indications.
21.2 Automatically and Manually Recoverable Errors
Display
Code
Fault
Cause
Remedy
OC-S
Overcurrent at
start
1. Motor winding and frame
short circuit.
2. Motor and ground short
circuit..
3. Power module is damaged.
1.Inspect the motor.
2. Inspect the wiring.
3. Replace the power module.
Cont.
