Xylem IM043 AQUAVAR Variable Speed Pump Control - Manual (Page 64)

Repair of Faults and Errors
Lack of Water
This error message will be displayed when a switch has indicated that the incoming water pressure
or water level in a suction tank falls below the required NPSH of the pump. If suction conditions
appear to be correct, check the pressure switch or float switch to make sure it is operating proper-
ly. When the suction conditions have returned to normal, the pump will restart automatically. This
message will also appear if terminals 6 and 7 on terminal block X1 are not bridged.
Conveyor Control (value Range Control Error)
The drive is not able to obtain the minimum required value set in the conveyor limit setting. Look
for potential reasons for the low signal or lower the “CONVEYOR CONTROL” or increase the
“DELAY TIME” settings. Under “SUBMENU ERRORS”, check the PSI setting on the conveyor limit
and increase the “DELAY TIME”.
Overtemp Motor
The motor temperature is too high and has tripped the temperature sensor inside the conduit box.
To correct, check terminal connections for evidence of a switch or jumper, check ambient tempera-
ture, check rotation cooling (TEFC fan operation), and possible motor overload. Once corrected,
the unit may be reset by turning off the AQUAVAR controller for at least 30 seconds.
Overtemp Inverter
The inverter temperature is too high. This is normally caused by a lack of cooling of the aluminum
heat sink on the bottom of the AQUAVAR controller. Check this area for dirt, check the flow of air
from the motor fan, and check the ambient temperature. Once the temperature has been reduced
to the operating range, the AQUAVAR controller can be reset by turning it off for at least 30 seconds.
Over voltage
The AQUAVAR controller can run at 230 V single phase ±15% or 460 V three phase ±10% in
normal U.S. configuration. Voltage spikes beyond this range can cause the unit to shut down.
High voltage switching somewhere in the main line can cause such a spike to occur. If this trip-
ping continues, a main line reactor may be installed at the circuit box. A fast setting for Ramp 2 can
also cause this error. To reset the AQUAVAR controller, turn it off for at least 30 seconds.
under voltage
Check the actual voltage or check for a burned-out fuse or tripped circuit breaker. After correcting
the problem, turn off the AQUAVAR controller for at least 30 seconds to reset.
DISCONNECT POWER FROM THE AQUAVAR CONTROLLER BEFORE CONNECT-
INg THE FAuLTS TO AvOID POTENTIAL FOR AuTOMATIC PuMP RESTART.
WARNINg
63
Repair of Faults and Errors
WARNING
hazardous
voltage