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IMTP(D) 2.2 – ITTP(D) 2.2/4.0/5.5/7.5 - ELECTROIL
ENG
17 Maximum pressure The pressure has exceeded the set-point value + percentage
value of the set-point. Increase the maximum pressure
percentage to 200%.
MenuAdvanced functionsPressure controlMaximum
pressure.
Table 12: Alarm list for ITTP(D) 4.0-5.5-7.5 M
6.5 Group Functioning - data transmission via serial bus RS485
Pumps controlled by inverters communicating with RS485 in control logic MASTER – SLAVE differential type:
1. Connecting all Inverters with a bipolar signal cable for RS485, respecting the polarity A and B (for connections,
follow the instructions on par. 5.6.5);
2. Set the MASTER inverter: Advanced Functions > Control Type > Mode: Master Slave (DP); Code = 0; N°
Pumps ≥2;
3. Set on the remaining SLAVES Inverters (maximum 7): Advanced Functions > Control Type > Mode: Master
Slave (DP); Code (≥1); N° Pumps (≥2).
IMPORTANT NOTE: Use one sensor for every Inverter (two sensors for Differential pressure control) to guarantee
the redundancy and the group functioning continuity in case of damage of one of the Motors/Sensors/Inverters; when
the sensors have problems, the Master Inverter read the output of the sensors connected to a slave Inverter. For
group mode, it is important the good state of charge of the lithium battery of the Master Inverter, to maintain the date
and time.
During group functioning in case of voltage trip, Master fault or serial bus cable damage, the Slave
Inverters continuous functioning in single mode, reading their pressure sensors. Although there
is not a stop of the complete system, restore the damaged cable/sensor/inverter in order to
guarantee the perfect pressure control and the perfect alternation of the pumps and its duration.
6.6 Replacing the lithium battery
The 3V lithium battery (type CR2032 for IMTP(D)2.2 and ITTP(D)2.2, CR2430 for ITTP(D)4.0/../7.5) is used exclusively
for storing date and time even in the absence of power supply for a long time (the battery can live 6-8 years without
inverter power supply). The lithium battery should be replaced when the user notice that the inverter does not maintain
stored date and time 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;
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 ON THE MOST COMMON INSTALLATION AND WORKING PROBLEMS
1
Pressing start button the
motor don’t 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 don’t 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 haven’t 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.
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