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IMTP 2.2 - ITTP 2.2/4/5.5/7.5
ENG
6.6 Replacing the battery
The lithium battery CR2032 for IMTP-ITTP2.2 and CR2430 for ITTP4/../7.5 are used exclusively for storing date
and time even in the absence of power supply for a long time (the battery can live 4-6 years without inverter
power supply). The lithium battery should be replaced when the user notice that the inverter does not maintain
stored date and hour in the absence of power supply.
NOTE: Even with exhausted or absent lithium battery remain stored all inverter functional settings indefinitely.
To replacing the lithium battery it needs:
1. Disconnect the power cable from the line;
2. Open the inverter box unscrewing the No. 4 screws;
3. Wait for the complete shutdown of the led which indicates the charge of capacitors before
touching any part of electronic boards;
4. Replace the battery present under the cover of the inverter.
7. SOLUTION OF THE MOST COMMON PROBLEMS
N°
Possible Problem
Possible solution
1
Pressing start button the motor
donÕt start or start and stop after
few seconds and the inverter
show Over-Current alarm or
Current Pick alarm
Check if the input/output of the inverter are respectly connected between line and
motor, without inversion (Warning: input/output inversion can damage the electronic
board of the inverter).
Check the correct connection of the pump (star/delta): possible mistake.
Check if all the three wires to the motor are connected good and the three current are
balanced.
Check if the motor power size is not so high on respect to the inverter size.
Check if the inverter is not on Master-Slave condition (Advanced Functions -> Group
Functioning) set to slave, without the Master inverter connected and switched on: in
this situation waiting 30s after pressing start button, the inverter will start automatically
alone.
2
Pressing start button the motor
donÕt start or start and stop
immediately and the inverter
show Under Voltage alarm
Check that all the input voltage supply wires are connected good on the entrance of
the inverter: if the inverter input is three-phases but on the connection there are only
two, the inverter switch on and can start the motor, but havenÕt enough power to
supply it.
Check that before the inverter the supply line wires size are good to have a limited
voltage drop, then a sufficient voltage value on the inverter.
3
During working at the maximum
power the inverter reduce
continuously the output power to
the motor then stop the motor
and the inverter show Over
Temperature IGBT alarm
/Inverter Temperature alarm
Temperature of the electronic board of the inverter is too high and the inverter must
remain stop for few minutes to reduce the internal temperature before the automatic
restart.
For wall mounting type be sure that the inverter stand on a wall, in vertical position,
protected from directly sunlight, and the air flow is totally free; for motor mounting type
check that the air flow from the motor fan is good to limit the aluminum temperature of
the inverter case under 60¡C; the inverter cannot work continuously at the maximum
power with a ambient temperature higher than 40¡C and with high temperature can
reduce automatically the output power (-10%, -20% then stop for few minutes). .
4
Pressure Transducer donÕt
measure the correct pressure
value (error > 1 Bar)
Check if the pressure transducer is connected on the delivery of the pump on a
correct position, not so close to the impellers and before the valve to close the flow.
5
Pressure Transducer measure a
pressure too high when the
motor is running then the
Inverter reduce the motor
velocity at the minimum value
(low frequency)
Check that the pressure cable is separated from the motor cable, that is a source of
noise; specially when the cable of the pressure transducer is too long (long distance
between inverter and motor) itÕs very important to use a shielded type two wire cable,
as far as possible to the motor supply cable. Connect the shield to ground only on one
terminal, if possible connect it directly on a metal screw to ground near the motor.
6
The Inverter cannot work
because remain in Pressure
Transducer Problem alarm
condition
Check If the wires of the pressure transducer are correctly connected brown on +,
white on S contact on the board.
Check wiring connection on the cable of the pressure transducer.
Warning: In case you need to cut the pressure transducer cable to add a longer cable
be sure to switch off the inverter at least 1 minute before to cut this cable, otherwise
you can cause a short circuit on the transducer input of the electronic board (damage)
if the internal capacitors are not totally discharged.
7
The distance between Pressure
transducer and Pump is high
(long pipe) and the pressure
continuously go up and down
You must reduce the velocity of the feedback control reducing the Proportional factor
and the Integral factor (Advanced Functions -> P.I.D. Factors). Try to set these values
to half and test the system, then, if not enough, reduce more and test again until the
pressure control remain stable.
