Danfoss iC2 - Page 269

Application Guide | iC2-Micro Frequency Converters
FAULT 16, Short Circuit
Cause
There is short-circuiting in the motor or motor wiring.
Troubleshooting
l
 WARNING
HIGH VOLTAGE
AC drives contain high voltage when connected to AC mains input, DC supply, or load sharing. Failure to
perform installation, start-up, and maintenance by qualified personnel can result in death or serious injury.
l Only qualified personnel are allowed to perform installation, start-up, and maintenance.
Disconnect power before proceeding.
l Remove the power to the drive and repair the short circuit.
WARNING/FAULT 17, Control Word Timeout
Cause
There is no communication to the drive. The warning is only active when P 5.2.16 Watchdog Response is NOT set to [0] Off. If P 5.2.16
Watchdog Response is set to [5] Stop and trip, a warning appears, and the drive ramps down to a stop and shows an fault.
Troubleshooting
l Check the connections on the serial communication cable.
l Increase P 5.2.17 Watchdog Delay.
l Check the operation of the communication equipment.
l Verify that proper EMC installation was performed.
FAULT 18, Start Falied
Cause
The speed cannot exceed the value set in P 5.6.7 Start Max Speed [Hz] during start within the start time which is set in P 5.6.8 Start Max
Time to Trip. The fault may be caused by a blocked motor.
Troubleshooting
l Check if the motor is blocked.
l Check if the start max speed is set higher than the working speed after ramp up.
l Check if the start max time to trip is set shorter than the normal ramp up time.
FAULT 25, Brake Resistor Short Circuit
Cause
The brake resistor is monitored during start-up. If a short circuit occurs, the brake function is disabled and the fault appears. The drive is
tripped.
Troubleshooting
l Remove the power to the drive and check the connection of the brake resistor.
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