19
Trouble Codes of Variable Frequency Drive:
Code
Displayed Content
on the Screen
Symptoms
Solution
ERROR
1.
Power supply voltage is
low
2.
Reset function RES“on”
3.
Operator loose contact
with Main Machine
4.
Trouble of internal circuit
5.
CPU misoperation
1.
Supply with normal power
2.
Cut off reset switch
3.
Confirm to connect operator to
Main Machine
4.
Replace variable frequency
drive
5.
Restart variable frequency drive
OC0
Over current during
stopping machine
Output current exceed 2 times
as rated current of variable
frequency drive
Variable frequency drive may be
interrupted, power off and re-power
on, if this abnormal alarm happens
repeatedly, please sent it to
manufacture for inspecting and
repairing
OC1
Over current during
acceleration
1.
If there is rapid acceleration or
rapid deceleration, please
extend time of acceleration and
deceleration
2.
Prevent load from rapidly
enlarging
3.
Check whether short circuit will
happen on U/T1, V/T2 and
W/T3 terminals of motor
OC2
Over current during
constant speed
OC3
Over current during
deceleration
OV0
Over voltage
during stopping
machine
Voltage between terminal (+/P)
and (-/N) is over high
Check whether input power is
normal
OV1
Over voltage during
acceleration
1.
If there is rapid acceleration or
rapid deceleration, please
extend time of acceleration and
deceleration
2.
Check whether regenerative
braking resistor between
te/P and PR will fall
3.
Check whether the set value
between 06-05(P.30) and 06-06
(P.70) is correct
OV2
Over voltage during
constant speed
OV3
Over voltage
during deceleration
THT
IGBT module is
overheated
Thermal relay operation of
IGBT module
Prevent variable frequency drive
from long-time overload running
THN
Motor is
overheated
Electronic thermal relay
operation
1.
Check whether set value of
06-00(P.9) is correct (based on
external motor)
2.
Reduce load
OHT
Operation of
thermal relay of
external motor
Thermal relay operation of
external motor
1.
Check whether external thermal
relay capacity match to motor
capacity
2.
Reduce load
OPT
Peripheral
abnormality
1.
Communication
abnormality, exceed retry
times of communication
abnormality
2.
Communication
interruption, exceed
allowable time of
communication interval
1.
Correctly set parameters related
to communication
Summary of Contents for AH-5
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