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| HPI Combi Flow User Guide |
Version 3.11
www.lafert.com
12. Troubleshooting
12.1. Fault Messages
Fault
Code
No.
Message
Description
Corrective Action
o-Ft
00
No Fault
No Fault
Displayed in P0-13 if no faults are recorded in the log.
-
03
Over current trip
Instantaneous over
current on drive
output
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.
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 controlled, and is releasing correctly.
Fault Occurs When Running
Reduce the speed loop gain in P4-03 and P4-04.
.t-t
04
Over load trip
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 acceleration rate or reduce the load.
Check motor cable length is within the limit specified for the relevant drive in
11.5. Output Power and Current ratings
.
Ensure the motor nameplate parameters are correctly entered in P1-07, P1-08,
and P1-09.
Check the load mechanically to ensure it is free, and that no jams, blockages or
other mechanical faults exist.
For a centrifugal fan or pump, a small reduction in output frequency could
significantly reduce the load.
S-t
05
Hardware Over
Current
Instantaneous over
current on drive
output
Check the motor wiring and motor itself for phase to phase and phase to earth
short circuits. Disconnect the motor and motor cable and retest. If the drive trips
with no motor connected, it must be replaced and the system fully checked and
retested before a replacement unit is installed.
-ot
06
Over voltage
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.
If operating in PID control, ensure that ramps are active by reducing P3-11.
-ot
07
Under voltage
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.
-t
08
Over temperature
trip
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 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 section
Guidelines for Mounting (IP66 Units)
has been observed, 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.
-t
09
Under temperature
trip
Drive 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.
-e
10
Load default
parameters
Factory Default
parameters have
been loaded
Press STOP key, the drive is now ready to be configured for the required
application. Four button defaults – see section
E-t
11
External trip
Digital Input
External trip
E-trip requested on control input terminals. Some settings of P1-13 require a
normally closed contact 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.
S-
12
Optibus serial
comms fault
Communications
Fault
Communications lost with PC or remote keypad. Check the cables and
connections to external devices.
12
Tr
oublesh
ooting
