Operating instructions
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Neo
Installation & Operating Instructions
Page 43
11. Troubleshooting
11.1 Fault Messages
Fault Code
No Description Corrective Action
no-Ft
00 No Fault Displayed in P0-13 if no faults are recorded in the log
01-b
01 Brake channel over current Ensure the connected brake resistor is above the minimum permissible level for the drive – refer
to the ratings shown in section 10.4.
Check the brake resistor and wiring for possible short circuits.
0L-br
02 Brake resistor overload The drive software has determined that the brake resistor is overloaded, and trips to protect the
resistor. Always ensure the brake resistor is being operated within its designed parameter before
making any parameter or system changes.
To reduce the load on the resistor, increase deceleration the time, reduce the load inertia or add
further brake resistors in parallel, observing the minimum resistance value for the drive in use.
0 -1
03 Instantaneous over current on
drive output.
Excess load on the motor.
Fault Occurs on Drive Enable
Check the motor and motor connection cable for phase – phase and phase – earth short circuits.
Check the load mechanically for a jam, blockage or stalled condition
Ensure the motor nameplate parameters are correctly entered, P1-07, P1-08, P1-09.
If operating in Vector mode (P4-01 – 0 or 1), also check the motor power factor in P4-05 and ensure
an autotune has been successfully completed for the connected motor.
Reduced the Boost voltage setting in P1-11
Increase the ramp up time in P1-03
If the connected motor has a holding brake, ensure the brake is correctly connected and con-
trolled, and is releasing correctly
Fault Occurs When Running
If operating in Vector mode (P4-01 – 0 or 1), reduce the speed loop gain in P4-03
I.t-trp
04 Drive has tripped on overload
after delivering >100% of value in
P1-08 for a period of time.
Check to see when the decimal points are flashing (drive in overload) and either increase accelera-
tion rate or reduce the load.
Check motor cable length is within the limit specified for the relevant drive in section 10.4
Ensure the motor nameplate parameters are correctly entered in P1-07, P1-08, and P1-09
If operating in Vector mode (P4-01 – 0 or 1), also check the motor power factor in P4-05 and ensure
an autotune has been successfully completed for the connected motor.
Check the load mechanically to ensure it is free, and that no jams, blockages or other mechanical
faults exist
P-trp
05 Instantaneous over current on
drive output.
Refer to fault 3 above
-ot
06 Over voltage on DC bus The value of the DC Bus Voltage can be displayed in P0-20
A historical log is stored at 256ms intervals prior to a trip in parameter P0-36
This fault is generally caused by excessive regenerative energy being transferred from the load
back to the drive. When a high inertia or over hauling type load is connected.
If the fault occurs on stopping or during deceleration, increase the deceleration ramp time P1-04 or
connect a suitable brake resistor to the drive.
If operating in Vector Mode, reduce the speed loop gain P4-03
If operating in PID control, ensure that ramps are active by reducing P3-11
U-vot
07 Under voltage on DC bus This occurs routinely when power is switched off.
If it occurs during running, check the incoming supply voltage, and all connections into the drive,
fuses, contactors etc.
0-t
08 Heatsink over temperature The heatsink temperature can be displayed in P0-21.
A historical log is stored at 30 second intervals prior to a trip in parameter P0-38
Check the drive ambient temperature
Ensure the drive internal cooling fan is operating
Ensure that the required space around the drive as shown in sections 0 and 3.8 has been ob-
served, and that the cooling airflow path to and from the drive is not restricted
Reduce the effective switching frequency setting in parameter P2-24
Reduce the load on the motor / drive
U-t
09 Under temperature Trip occurs when ambient temperature is less than -10°C. The temperature must be raised over
-10°C in order to start the drive.
P-def
10 Factory Default parameters have
been loaded
Press STOP key, the drive is now ready to be configured for the required application
-trip
11 External trip E-trip requested on control input terminals. Some settings of P1-13 require a normally closed
contactor to provide an external means of tripping the drive in the event that an external device
develops a fault. If a motor thermistor is connected check if the motor is too hot.
C-065
12 Communications fault Communications lost with PC or remote keypad. Check the cables and connections to external
devices
Ft-dc
13 Excessive DC ripple The DC Bus Ripple Voltage level can be displayed in parameter P0-22
A historical log is stored at 20ms intervals prior to a trip in parameter P0-39
Check all three supply phases are present and within the 3% supply voltage level imbalance
tolerance.
Reduce the motor load - If the fault persists, contact your local Fenner distributor
P-Loss
14 Input phase loss trip Drive intended for use with a 3 phase supply, one input phase has been disconnected or lost.
h 0-1
15 Instantaneous over current on
drive output.
Refer to fault 3 above