Carrier OMNIZONE 50XJ064-104 Operating And Troubleshooting Manual page 24

ERROR
PROBLEM
CODE
OFF (Note 1) ST terminal OFF
NOFF Undervoltage in main
circuit
rtrY Retry in process
Err1 Frequency point
setting error
CLr Clear command
acceptable
EOFF Emergency stop
command acceptable
HI/LO Setting error alarm /
An error code and
data are displayed
alternately twice each.
db DC braking
In It Parameters in the
process of initialization
Setup parameters in
the process of being set
Atn Auto-tuning in process
NOTES:
1. ST : Terminal of stand by function.
2. When the ON/OFF function is selected for DC braking (DB), using the input terminal selection parameter, you can judge
the inverter to be normal if "db" disappears when opening the circuit between the terminal and CC.
ERROR COMMUNICATION
CODE NO.
OC1 1
OC2 2
OC3 3
OCR 5
OCL 4
OP1 A
OP2 B
Table 15 — Non-Trip Messages for the 50BV VFD
POSSIBLE CAUSES
• The ST-CC circuit is opened.
• The supply voltage between R, S and T is
under voltage.
• The inverter is in the process of retry.
• A momentary stop occurred.
• The frequency setting signals at points 1
and 2 are set too close to each other.
• This message is displayed when pressing
the STOP key while an error code is displayed.
• The operation panel is used to stop the
operation in automatic control or remote
control mode.
• An error is found in a setting when data is
reading or writing.
• DC braking in process
• Parameters are being initialized to default
values.
• Setup parameters are in the process of
being set.
• Auto-tuning is in process.
Table 16 — Trip Messages for 50BV VFD
PROBLEM
Overcurrent during • The acceleration time ACC is too short.
acceleration • The V/F setting is improper.
• A restart signal is input to the rotating
motor after a momentary stop, etc.
• A special motor (e.g. motor with a small
impedance) is used.
Overcurrent during • The deceleration time dEC is too short.
deceleration (During deceleration)
Overcurrent during • The load fluctuates abruptly.
operation • The load is in an abnormal condition.
Arm overcurrent at • A main circuit element is defective.
start-up
Overcurrent (An • The insulation of the output main circuit or
overcurrent on the motor is defective.
load side at start-up) • The motor has too small impedance.
Overvoltage during • The input voltage fluctuates abnormally.
acceleration (1) The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyristor is connected
to the same power distribution line.
• A restart signal is input to the rotating
motor after a momentary stop, etc.
Overvoltage during • The deceleration time dEC is too short.
deceleration (Regenerative energy is too large.)
• F304 (dynamic braking resistor
activation) is off.
• F305 (overvoltage limit operation) is off.
(1) The input voltage fluctuates abnormally.
The power supply has a capacity of
200kVA or more.
(2) A power factor improvement capacitor is
opened or closed.
(3) A system using a thyristor is connected
to the same power distribution line.
• Close the ST-CC circuit.
• Measure the main circuit supply voltage.
If the voltage is at a normal level, the
inverter requires repairing.
• The inverter is normal if it restarts after
several tens of seconds.
The inverter restarts automatically. Be careful of the
machine because it may suddenly restart.
• Set the frequency setting signals at points
1 and 2 apart from each other.
• Press the STOP key again to clear the
trip.
• Press the STOP key for an emergency stop.
To cancel the emergency stop, press any other key.
• Check whether the setting is made
correctly.
• Normal if the message disappears after
several tens of seconds. (See Note 2.)
• Normal if the message disappears after a
while (several seconds to several tens of seconds).
• Normal if the message disappears after a
while (several seconds to several tens of seconds).
• Normal if the message disappears after
several seconds.
POSSIBLE CAUSES
24
REMEDIES
REMEDIES
• Increase the acceleration time ACC.
• Check the V/F parameter.
• Use F301 (auto-restart) and F302
(ride-through control).
• Increase the carrier frequency F300.
• Increase the deceleration time dEC.
• Reduce the load fluctuation.
• Check the load (operated machine).
• Make a service call.
• Check the cables and wires for defective
insulation.
• Insert a suitable input reactor.
• Use F301 (auto-restart) and F302
(ride-through control).
• Increase the deceleration time dEC.
• Install a suitable dynamic braking resistor.
• Enable F304 (dynamic braking selection).
• Enable F305 (overvoltage limit operation).
• Insert a suitable input reactor.