Omron SYSDRIVE 3G3MV SERIES User Manual

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Fault display Probable cause and remedyWarning name and meaning
oH3 Inverter overheating warning (oH3)
An Inverter overheating warning signal
was input from an external control
terminal set to multi-function input.
• Clear the Inverter overheating warning signal.
• Eliminate the cause of the warning signal input.
CE Communications time over (CE)
RS-422 or RS-485 communications
were not properly carried out within
2 s. (Detected when n151 is set to
“3.”)
• A short-circuit, ground fault, or disconnection has
occurred on the communications line.
→ Check and correct the line.
• The termination resistance setting is incorrect.
→ In the case of RS-422 communications, set
pin 1 of SW2 of all Inverters to ON. In the
case of RS-485 communications, set pin 1 of
SW2 of only the Inverter located at each end
of the network to ON.
• Noise influence.
→ Do not wire the communications line along
with power lines in the same conduit.
→ Use the twisted-pair shielded wire for the
communications line, and ground it at the
Master.
• Master’s program error.
→ Check and correct the program so that
communications will be performed more than
once every 2-s period.
• Communications circuit damage.
→ If the same error is detected as a result of a
self-diagnostic test, change the Inverter.
Maintenance Operations Chapter 8

Omron SYSDRIVE 3G3MV SERIES Specifications

General

Model	SYSDRIVE 3G3MV SERIES
Category	Inverter
Input Frequency	50/60 Hz
Output Frequency	0.1 to 400 Hz
Cooling Method	Forced Air Cooling
Input Voltage	200 to 240 VAC, 380 to 480 VAC
Horsepower Range	0.1 to 15 HP
Power Range	0.1 to 11 kW
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication	RS-485
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 65°C
Humidity	5 to 95% RH (non-condensing)
Vibration	5.9 m/s² or less
Voltage Class	200V, 400V