Zapi ZAPIMOS Series, Руководство пользователя

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Page 62
11. STBY I HIGH
Test carried out in standby. Check if the current is 0. If not verified, an alarm is signalled
which inhibits machine operations. Possible causes:
a. current sensor failure;
b. logic failure: first replace the logic; if the defect persists, replace the power unit.
12. MAIN CONTACTOR ALARMS
In the combi system (pump + traction) the main contactor is driven by the traction in-
verter. So the following description concerns the pump inverter used independently
from the traction inverter. In this configuration the pump inverter manages its own main
contactor.
COIL SHORTED:
When the key is switched ON the µP checks the MC driver FF SR. If it does not react in
a correct way to the µP stimulus, the alarm is signalled. Replace the logic board. The
FF SR makes an hardware control of the current in the MC coil. If this is too high, it
opens the MC and the alarm is signalled.
Check if there are external shortcircuit and if the ohmic value of the MC is correct;
otherwise replace the logic.
DRIVER SHORTED:
When the key is switched ON, the µP checks that the MC coil driver is not shorted; if it
is, this alarm is signalled; replace the logic board.
CONTACTOR DRIVER:
When the initial diagnosis is finished, the traction logic closes the MC and checks the
voltage on the Drain of the driver. If this is not low , an alarm is signalled.
Replace the logic.
CONTACTOR OPEN:
The main contactor coil has been driven by the logic board, but the contactor does not
close. Two possible reasons:
a) the wires to the coil are interrupted or not well connected.
b) the contact of the contactor is not properly working.
13. HIGH TEMPERATURE
Chopper temperature is greater than 75°C. The maximum current is reduced propor-
tionally to the temperature increase. The chopper stops at 100°C.
If the alarm is signalled when the chopper is cold:
a. check the wiring of the thermal sensor;
b. thermal sensor failure;
c. logic failure.
14. MOTOR TEMPERATURE
This warning is signalled if the motor temperature switch opens digital sensor or if the
analog signal overtakes the cut-off level. If it happens when the motor is cold, check the
wiring. If all is OK, replace the logic board.
15. THERMIC SENSOR KO
The range of inverter temperature sensor is always checked and a warning is signalled
if it is out of range.
When this alarm is signalled, check the connection of the sensors.