POWER ELECTRONICS
SDRIVE 700
FAULT MESSAGES. DESCRIPTIONS AND ACTIONS
103
DISPLAY
POSSIBLE CAUSE
ACTIONS
The pump is operating with no load.
Check if the pump of the installation is not
operating with no water.
F68
CAVIT/UNDERL
Settings of the drive in protections group G25.6 are
incorrect.
Verify the settings of the parameters referred to the
cavitation protection depending on the installation.
Check if the pump has water.
Check if the flow detector has water and is
connected correctly.
F69 FLOW SWITCH
The digital input configured as flow detection
indicates absence of the same one.
Check the settings in group G25.6.
F70 IRRIGATOR F
An external trip to the drive has been produced by
closing a contact on the digital input configured as
IRRIGAT TRIP.
Verify your irrigating equipment and check if the
connections between the drive and the irrigating
equipment are correct.
Verify possible leakages in the installation.
F71 CYCLING
The drive shows several start / stop cycles (wake
up / sleep) in a short time.
Verify the settings of this protection in group G25.6.
Verify the water level in the aspiration circuit (well,
tank, etc.).
F72 IN PRES SW
Breakage or low water in aspiration circuit.
Verify the status of the pressure switch.
11.3.
Maintenance
SD700 drives consist of many electronic parts such as semiconductor devices. Temperature,
humidity, vibration and deteriorated components can reduce its efficiency. To avoid any possible
irregularity we recommend making periodic inspections.
11.3.1.
Warnings
Be sure to remove the input power while performing maintenance.
Be sure to perform maintenance after checking the DC Link capacitor has discharged. Check
that the voltage between terminals VDC(+) – VDC(-) is below DC 30V. The bus capacitors in
the drive main circuit can still be charged even after the power is turned off.
The correct output voltage of the drive can only be measured by using an RMS voltage
meter. Others voltage meters, including digital voltage meters, are likely to display incorrect
values caused by the high frequency PWM output voltage of the drive.
11.3.2.
Routine inspection
Be sure to check the following points before handling the drive:
Installation site conditions.
Drive cooling system conditions.
Excessive vibrations.
Excessive overheating.