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TROUBLESHOOTING
ERRORS AND ALARMS
If an alarm is triggered, the drive's LCD screen will display the fault code text and the Variable Speed Pump will
stop running. Disconnect power to the pump and wait until the keypad LEDs have all turned off. At this point,
reconnect power to the pump. If the error has not cleared then proper troubleshooting will be required. Use the
error description table below to begin troubleshooting.
Fault Code
Description
E-01
Inverter unit protection
E-02
Acceleration over current
E-03
Deceleration over current
E-04
Constant speed over current
E-05
Acceleration over voltage
E-06
Deceleration over voltage
E-07
Constant speed over voltage
E-08
Under voltage fault
E-09
Motor overload
E-10
Inverter overload
E-16: Communication Link between the HMI and Motor control has been lost: Check the jacketed wire on
the back side of the keypad inside the drive top cover. Ensure that the 5 pin connector is properly plugged into
the socket and that there is no damage to the cable.
E-01, 02, 03, 04, 05, 06, 07, 09, 10, 24: Internal Errors: If this error displays multiple times, then there may
be a problem with the pump's rotating assembly. Disassemble the pump and check to see if there is a problem
with the impeller or mechanical seal. (See Pump Disassembly section for instructions on disassembling the
pump).
E-08: Absolute AC Under Voltage Detected: This indicates that the supply voltage has dropped below the
operating range of 200V. This could be caused by normal voltage variation and will clear itself. Otherwise,
there could be excess voltage sag caused by improper installation or improper supply voltage.
E-14: Module Overheading: Should be caused by high ambient temperature or overload.
Fault Code
E-11
E-12
E-14
E-16
E-17
E-24
16
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Description
Phase loss at input side
Phase failure at output side
Module overheating
Communication fault
Current detection fault
Inverter hardware fault
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