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Error Fault Description Cause Pump Reaction / Solution
E42 Faulty LED LED on the User Interface failure Pump runs normally, but no display
Check ribbon able connection between the board and drive cover.
If OK, replace the drive cover
E43 Communications
failed
Loose contact Pump runs normally. Reconnect or change the cable
E51 Motor software
protection active
IGBT transistor fault. Check motor
mechanically and electrically, check motor
electrical connections.
Check motor mechanically for external water
leaks, build up of statir condensation or
thermal damage.
Misalignmernt of the impeller eye
and volute seal ring
Pump will not run.
For misalignment, inspect the impeller area in the outlet side of the
volute. Misalignment will occur during the motor alignment process.
If OK perform a hard reset (power pump o / on)
E52 Excessive motor
temperature
Motor is too hot Pump will not run until the motor temperature is reduced.
May require a hard reset to remove error.
Reduce ambient temperature around pump, Check for uid
temperatures above 220˚ F. Ensure motor is installed horizontally.
Conform pump is operating within allowable Watts and
Amperage (ensure the pump is not running o it’s curve)
E53 Pump model
invalid or out
of range
Software does not match
the pump model
Pump will run, but at wrong power and speed settings.
Reash the pump »bin« software using the HTML More Tab
hi Pump set to
max RPM
RPM setting and application mismatch If the pump does not change speeds as expected,
reduce speed by 100 RPM. RPM will show in place
of hi and speed modulation will occur.
Error Codes Continued
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