installation &
operating instructions
Design Envelope 4302 ivs and 4382 ivs vertical
in-line pumping unit with integrated controls
47
alarm 70
, Illegal Frequency Converter Confi guration:
Actual combination of control board and power board
is illegal.
alarm 90
, Feedback Mon.:
alarm 91
, Analogue Input 54 Wrong Settings:
Switch s202 has to be set in position off (voltage input),
when a kty sensor is connected to the analogue input
terminal 54.
alarm 92
, No Flow:
A no load situation has been detected for the system. See
parameter group 22–2*.
alarm 93
, Dry Pump:
A no fl ow situation and high speed indicates that the pump
has run dry. See parameter group 22–2*.
alarm 94
, End of Curve:
Feed back stays lower than the set point, which may be
indicates a leak-age in the pipe system. See parameter
group 22–5*.
alarm 95
, Broken Belt:
Torque is below the torque level set for no load indicating a
broken belt. See parameter group 22–6*.
alarm 96
, Start Delayed:
Start of the motor has been delayed due to short cycle pro-
tection is ac-tive. See parameter group 22–7*.
alarm 250
, New Spare Part:
The power or Switch Mode Power Supply has been ex-
changed. The inverter type code must be restored in the
eeprom. Select the correct type code in Par. 14–23 Type code
Setting according to the label on unit. Remember to select
‘Save to eeprom’ to complete.
alarm 251
, New Type Code:
The frequency converter has got a new type code.
15.0 acoustic noise and vibration
If the pump or the pipework close to the pump is making
noise or vibrations at certain frequencies, try the following:
• Speed Bypass, parameters 4–6*
• Over-modulation, parameter 14– 03 set to o
• Switching pattern and frequency parameters 14–0*
• Resonance Dampening, parameter 1–64
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