5 Fault messages
5.1 Introduction
DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com 139
PS-trp 05 Overcurrent (Hardware)
• Check the wiring to the motor and the motor itself for short-circuits and
ground faults.
• Disconnect the motor cable from the variable frequency drive and switch
the variable frequency drive back on. If the fault message still appears, the
device needs to be replaced. Before commissioning the new device, check
the system for short-circuits or ground faults that could have caused the
device to fail.
O.Volt
06 Overvoltage in DC link
The DC link voltage value can be viewed using parameter P0-20.
P0-36 contains a fault register with the last values before the unit was
switched off (scan time: 256 ms).
• Check to make sure that the supply voltage falls within the range for which
the variable frequency drive is sized.
• If the fault occurs during deceleration or stopping: Make the deceleration
ramp (P1-04/P2-25) longer or use the brake resistor.
• In vector control mode (P4-01 = 0 or = 1): Reduce the speed controller’s
gain (P4-03).
• If using the PID controller: Reduce P3-11 (PID1 fault ramp) to ensure that
the ramps are active.
V.Volt
07 Undervoltage in DC link
Note:
Generally, this message will appear when the supply voltage is switched off
on the device and the DC link voltage dies away.
In this case, there is no fault.
If the message appears during operation:
• Check whether the power supply voltage is too low.
• Check all components/devices in the variable frequency drive’s feeder
circuit (circuit-breaker, contactor, choke, etc.) to make sure they are
connected properly and have an adequate contact resistance.
O-t
08 Overtemperature at heat sink. The drive is too hot.
The heat sink temperature can be viewed by using P0-21. P0-38 contains a
fault register with the last values before the unit was switched off (scan time:
30 s).
• Check to make sure that the variable frequency drive is being operated
within the ambient temperature range specified for it. (IP20 devices: max.
50 °C; IP66 devices: max. 40 °C).
• Check to make sure that the device fan is running.
• Make sure that cooling air can circulate freely (clearances to neighboring
devices above and below the variable frequency drive).
• Improve the control cabinet’s ventilation if necessary: The device’s vents
must not be obstructed, e.g., by dirt or as a result of devices being installed
too close to each other.
• Reduce the switching frequency with P2-24.
• Reduce the load, if possible.
V-t
09 Under-temperature
The message will appear if the ambient air temperature falls below -10 °C. In
order to be able to start the drive, the temperature must be higher than this.
P-dEf 10 The parameters’ default settings have been loaded.
• Press the STOP button: You will be able to reconfigure the drive after doing
so.
Message
Error no.
[dec]
Possible causes and fixes
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