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List of alarm displays and protective functions
 

Keypad panel display Alarm Name Contents of operation
LED LCD
Over current OC1 OC DURING ACC During
acceleration
If the inverter output current momentarily exceeds the overcurrent
detection level due to an overcurrent in the motor, or a short-circuit
or a ground fault in the output circuit, the protective function is
activated.
OC2 OC DURING DEC During
deceleration
OC3 OC AT SET SPD Running at
constant speed
Ground fault EF GROUND FAULT If a ground fault in the inverter output circuit is detected, the protective function is
activated (for 40HP or more only). If a ground fault occurs in an inverter rated at
30HP or less, the inverter is protected by the overcurrent protection. If protection
against personal injury or property damage is required, install a ground-fault
protective relay or earth-leakage circuit breaker separately.
Overvoltage OU1 OV DURING ACC During
acceleration
If the DC link circuit voltage of 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 apply (e.g.,
high-voltage line) may not be provided.
OU2 OV DURING DEC During
deceleration
OU3 OV AT SET SPD Running at
constant speed
Undervoltage LU UNDERVOLTAGE If the DC link circuit voltage of the main circuit falls below the undervoltage detection
level (230V series: 200V DC,460V series: 400V DC) due to a lowered power supply,
the output is shut down. If function code F14 (Restart after momentary power failure)
is 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.
Input open-phase Lin PHASE LOSS If the inverter is driven with any one of the three phases connected to L1/R, L2/S and L3/T
of the main circuit power supply "open", the rectifying diodes or smoothing capacitors may
be damaged, at such time an alarm is issued and the inverter is tripped.
Overheating of heat
sink
OH1 FIN OVERHEAT If the temperature of the heat sink rises due to a cooling fan failure, etc., the
protective function is activated.
External alarm OH2 EXT ALARM If the external alarm contacts of the braking unit, braking resistor or external thermal
O/L relay are connected to the control circuit terminals (THR), this alarm will be
actuated according to contact off signal.
When the PCT thermal protection is activated(H26:1), it operates when the detected
temperature is increased.
Inverter internal
overheating
OH3 HIGH AMB TEMP If the temperature inside the inverter rises due to poor ventilation, etc., the protective
function is activated.
Overcurrent of the terminal 13(20mA or more) due to the short circuit between the
terminal 13 and 11, etc., the protective function is activated.
Overheating of
braking resistor
dbH DBR OVERHEAT If electronic thermal O/L relay (for braking resistor) function code F13 is selected, the
protective function is activated to prevent the resistor from burning due to overheating
following frequent use of the braking resistor.
Motor 1 overload OL1 MOTOR1 OL The protective function is activated if the motor current exceeds the preset level,
provided that electronic thermal O/L relay 1 function code F10 has been selected.
Motor 2 overload OL2 MOTOR2 OL 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 code A04 is selected.
Inverter overload OLU INVERTER OL If the output current exceeds the rated overload current, the protective function is
activated to provide thermal protection against semiconductor element overheating in
the inverter main circuit.
Blown fuse FUS DC FUSE OPEN 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 40HP or more only).
Memory error Er1 MEMORY ERROR If a memory error occurs, such as missing or invalid data, the protective function is
activated.
Keypad panel
communication
error
Er2 KEYPD COM ERR If a communication error or interrupt between the keypad panel and control circuit is
detected, the protective function is activated.
CPU error Er3 CPU ERROR If an CPU error occurs due to noise, etc., the protective function is activated.
Option error Er4
Er5
OPTN COM ERR
OPTION ERROR
Error when using an optional unit
Forced stop Er6 OPR PROCD ERR Error when using the forced stop command
Output wiring error Er7 TUNING ERROR If there is an open circuit or a connection error in the inverter output wiring during
performing auto-tuning, the protective function is activated.
RS-485
communication error
Er8 RS-485 COM ERR If an error occurs when using RS-485, the protective function is activated.

 

Kinh Doanh 1: 0946 899 362 ( Zalo )

 

Kinh Doanh 2:0962 022 099

 

SHIP CODE TOÀN QUỐC*

 

Kỹ thuật 1: 07 6464 9556 ( Zalo )

 

Kỹ thuật 2 : 0977 812 351 

 

 

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