Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE User Manual
Page 66
Operating Instruction
66
11.6 Under voltage
ITT INDUSTRIES
UNDERVOLTAGE
Possible cause: Check mains supply, faulty
fuse or phase unsymmetry.
After the cause has been remedied, the malfunction can be reset by cutting off the power
supply for >30 seconds or pressing all three buttons ( ,
and
.
) together for about 5
seconds.
11.7 Limit
ITT INDUSTRIES
Overloaded
Possible causes: false data settings or the
pump is working at a capacity significantly in
excess of its performance data. If the limit signal remains, OVERLOADED will appear after a
few seconds and the frequency converter will stop.
After the cause has been remedied, the malfunction can be reset by cutting off the power
supply for >30 seconds or pressing all three buttons ( ,
and
.
) together for about 5
seconds.
11.8 Short Circuit
OUTPUT SHORT
E R R O R
This error means a too fast current peak at
the unit-output.
Possible reasons for this error!
Connection cable between the control unit and the motor is damaged or the motor is
defective.
Disconnect the system from the power supply and remedy the fault.
After the cause has been remedied, the malfunction can be reset by cutting off the power
supply for >30 seconds or pressing all three buttons ( ,
and
.
) together for about 5
seconds.
11.9 Overload
OVERLOADED
E R R O R
Possible cause: Pump is jammed!
Foreign body in the pumps, mechanical seal
defective (stiff) or the pump was idle for a long period of time.
Ramp 1 too fast:
Maximum frequency too high:
Boost too low:
Defective non-return valve – Pump runs in reverse when switched off
(
OFF).
De-energise and get the pump running again or if necessary call customer service.
After the cause has been remedied, the malfunction can be reset by cutting off the power
supply for >30 seconds or pressing all three buttons ( ,
and
.
) together for about 5
seconds.
11.10 Pressure Sensor Error I < 4 mA
ACT. VALUE SENSOR
E R R O R
Possible cause: Defective pressure
transmitter or broken cable (damaged cable)