Protective Operations; List Of Protective Functions - GE AF-300 P11 User Manual

6. Protective Operations

6.1 List of Protective Functions

In the event of an abnormality in the inverter's operation, the protective function will activate immediately to trip the
inverter and display the alarm name on the LED monitor while the motor coasts to a stop. A list of the alarms with their
explanations is included in the table below, and troubleshooting charts in Section 7.
Table 6.1.1 List of Alarms and Causes
Keypad Panel Display
Alarm Name
LED
OC1 OC DURING ACC
OC2 OC DURING DEC
Overcurrent
OC3 OC AT SET SPD
Ground fault EF GROUND FAULT
OU1 OV DURING ACC
OU2 OV DURING DEC
Overvoltage
OU3 OV AT SET SPD
Undervoltage LU UNDERVOLTAGE
Input phase loss Lin PHASE LOSS
Overheating of heat
OH1 FIN OVERHEAT
sink
External alarm OH2 EXT ALARM
Overheating
OH3 HIGH AMB TEMP
internally
Overheating of
dbH DBR OVERHEAT
braking resistor
Motor 1 overload OL1 MOTOR1 OL
Motor 2 overload OL2 MOTOR2 OL
Drive overload OLU INVERTER OL
Blown fuse FUS DC FUSE OPEN
Memory error Er1 MEMORY ERROR
Keypad panel
communication Er2 KEYPD COM ERR
error
CPU error Er3 CPU ERROR
Option error Er4 OPTN COM ERR
Er5 OPTION ERROR
Operating error Er6 OPR PROCD ERR
Output wiring error Er7 TUNING ERROR
Modbus RTU error Er8 RS485 COM ERR
Note: Number in fron of Alarm Code indicates multiple alarms. See page 4-15.
Data subject to change without notice 7/07. © 2007 GE Drives
LCD
During acceleration
During deceleration
Running at constant
speed
If a ground fault in the inverter output circuit is detected, the protective function is activated (for 40 Hp
or more only). If a ground fault occurs in an inverter rated at 30 Hp or less, the inverter is protected by
the overcurrent protection. If protection against personal injury or property damage is required, install
a separate ground-fault protective relay or ground leakage circuit breaker.
During acceleration
During deceleration
Running at constant
speed
If the DC link voltage in the main circuit falls below the undervoltage detection level (230V series: 400V
DC, 460V series: 800V DC) due to a lowered power supply, the output is shut down. If function F14
Restart after momentary power failure was selected, an alarm is not displayed. In addition, if the supply
voltage falls to a level unable to maintain control power, an alarm may not be displayed.
If input power L1/R, L2/S and L3/T has any phase of the 3 phase power "OPEN" or if there is a significant
disparity between the phases, the retifying diodes or smoothing capacitors may be damaged. An Alarm
is displayed and the protective function is activated during heavy load.
If the temperature of the heat sink rises due to a cooling fan failure, or the temperature of the heatsink
is too low, the protective function is activated during heavy load.
If the external alarm contacts on the braking unit, braking resistor, or external thermal O/L relay are
connected to the control circuit terminals (THR), the contacts will be actuated according to contact
signals.
If the temperature inside the inverter rises due to poor ventilation, etc., the protective function is
activated.
If electronic thermal O/L relay (for braking resistor) function F13 is selected, the protective function is
activated to prevent the resistor from burning due to overheating caused by frequent use of the braking
resistor.
The protective function is activated if the motor current exceeds the preset level, provided that
electronic thermal O/L relay 1 function F10 has been selected.
If the second motor current exceeds the preset level when the operation is switched to drive the
second motor, the protective function is activated, provided that electronic thermal O/L relay 2 of
function A04 was selected.
If the output current exceeds the rated overload current, the protective function is activated to provide
thermal protection against overheating of the semiconductor elements in the inverter's main circuit.
If the fuse in the inverter is blown out following a short-circuit or damage to the internal circuit, the
protective function is activated (for 40 Hp or more only).
If a memory error occurs, such as missing or invalid data, the protective function is activated.
If a communication error or interrupt between the keypad panel and control circuit is detected, the
protective function is activated.
If a CPU error occurs due to noise, etc., the protective function is activated.
Error occurred while using an optional unit.
Detects drive operating procedure error during drive startup. FWD or REV connected to terminal CM
when Main power is applied to drive (F02 setting 3 or 4). Stop key on keypad is pressed in terminal
operation (F02 setting 1 or 3). Detected timed alarm stop command.
If there is an open circuit or connection error in the inverter output wiring during an auto-tuning
procedure, the protective function is activated.
If an error occurs while using Modbus-RTU, the protective function is activated.
Cause of Activation
If the inverter output current momentarily exceeds the overcurrent detection
level, due to an overcurrent in the motor, or a short-circuit or ground fault in the
output circuit, the protective function is activated during heavy load.
If the DC link voltage in the main circuit exceeds the overvoltage detection level
(230V series: 400V DC, 460V series: 800V DC), due to an increase in the
regenerating current from the motor, the output is shut down. However,
protection against inadvertent overvoltage (e.g., high-voltage line) may not be
provided
6-1