Taco 00e Series

-51-
Error Fault Description Cause Pump Reaction / Solution
E10 Low Motor Load
(probable dry run)
Check for air at pump (low or no inlet
pressure. If pump noisy, check for impeller
damage. If pump in error is on a secondary
piping system, the primary pump could be
pumping through the secondary causing
a low load.
Pump runs at minimum speed until load is increased to the required
minimum (pump system is pressurized or air lock is removed).
If oversized primary suspected, turn o primary
and observe secondary
E11 High Motor Load
(excessive wattage)
Possible causes: Binding of the rotating
assembly, uncontrolled excessive ow, viscus
pumping uids or misalignment of the
impeller eye and volute seal ring.
Pump runs at normal speed, limited by wattage,
until the cause is corrected.
Check rotating assemble including sleeve bearings for
contamination, insure the pump is not running o it’s curve.
If glycol used for freeze protection, conrm % concentration
(should not need to exceed 40%) and monitor as the system
temperature increases.
For misalignment, inspect the impeller area in the outlet side of the
volute. Missalignment will occur during the motor alignment process
E24 Converter
Overload
IGBT transistor fault. Check motor
mechanically and electrically, check motor
electrical connections.
Check motor mechanically for external water
leaks, build up of stator condensation or
thermal damage.
Misalignment of the impeller eye
and volute seal ring
Conrm stator housing condensate drain slots are open
and not insulated over
E25 Over voltage High input voltage or
electronic board failure
Pump runs normally
If voltage within range, change the pump
E26 Under voltege Low input voltage, electronic board failure
or ow through pump when o.
Pump runs at a lower power
Check input power.
E27 PFC overcurrent PFC fault Pump will not run
Change the frequency converter or change the pump
For misalignment, inspect the impeller area in the outlet side of the
volute. Misalignment will occur during the motor alignment process.
close a valve near the pump (error should be eliminated) If ow
through o pump and voltage are conrmed ok, replace the pump
E31 Software motor
protection active
Loose contact, check motor mechanically Pump will not run
Reconnect bimetal
Error categories
E1x Motor Load Errors
E2x Overload Protection Errors
E3x Pump Errors
E4x Device Specic Error Codes
E5x Motor Error Codes
Error code details (cause, solution and pump reaction)
19. FAULT FINDING
19.1 Error Codes
The following error codes will be displayed on the user interface, HTML Pump Overview tab (Status) for
current error, HTML Log tab for error history and the appropriate Modbus and BACnet registers.