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DICTATOR Technik GmbH · +49 (0)821 246730 · [email protected] · www.dictator.de · 22.06.22
Technical manual: SQUARE 940-2
8. Troubleshooting
8.1 ERROR CODES
Error
code
Reason
Check
OV
Overvoltage, either the mains voltage
is too high or the deceleration is too
fast
OH
Overheating, the controller is too
hot. Check the ventilation. Check
parameter j*=1
OC1
The drive is overloaded. The motor
current exceeds the converter power
by 210 %
OC2
The motor current exceeds the inverter
power by 150 % for more than 30
seconds
The controller or drive is overloaded. Check
for obstacles. Check the operator selection.
OC3
Overcurrent during acceleration, the
acceleration is too fast
OC4
Overcurrent during DC braking
DC braking is too aggressive, reduce
parameter h*.
OC5
Severe overload, possibly permanent
damage to the control system
Check whether there is a short circuit or the
motor is blocked, the brake does not release
or parameter b is set too high.
HE1
Low internal 12 V supply
Check the I/O wiring for a possible short
circuit.
HE2
Low internal 24 V supply
Check the I/O wiring for a possible short
circuit.
E01
Mechanical overload (slip monitoring)
or missing signal from rotary encoder
Check the rotary encoder wiring and for
possible mechanical obstacles.
E02
Direction of rotation error
Check the encoder wiring. Check if the
number of pulses counts up when the door is
opened and counts down when it is closed.
E03
No signal from rotary encoder (only
during installation)
Check the wiring to the console and for
mechanical obstacles.
E04
Another input than expected has been
activated.
Check the position of the reference point.
