Zapi ACE0 2mC - Page 122

Page – 122/155 AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual
- In case the problem is not solved, replace the controller.
PUMP VACC NOT OK (MDI/LED code = 50)
Cause:
The minimum voltage of the lift potentiometer is not correctly set.
Troubleshooting:
It is suggested to repeat the acquiring procedure of MIN LIFT and MAX LIFT
(see paragraph 9.2).
PUMP VMN LOW (MDI/LED code = 28)
Cause:
The pump motor output is lower than expected, considering the PWM duty cycle
applied.
Troubleshooting:
A) If the problem occurs at start up (the LC does not close at all), check:
- Motor internal connections;
- Motor power cables connections;
- If the motor connection are OK, the problem is inside the controller.
B) If the problem occurs after closing the LC (the LC closes and then opens back
again), check:
- Motor internal connections;
- If motor windings/cables have leakages towards truck frame;
- If no problem are found on the motors, the problem is inside the
controller.
C) If the alarm occurs during motor running, check:
- Motor internal connections;
- If motor windings/cables have leakages towards truck frame;
- That the LC power contact closer properly, with a good contact;
- If no problem are found on the motors, the problem is inside the
controller, it is necessary to replace the logic board.
PUMP VMN HIGH (MDI/LED code = 29)
Cause:
This test is carried out when the pump motor is turning (PWM applied). The
pump motor output is higher than expected, considering the PWM applied.
Troubleshooting:
- Motor internal connections
- If motor windings/cables have leakages towards truck frame
- If no problem are found on the motors, the problem is inside the
controller, it is necessary to replace the logic board.
PUMP VMN NOT OK (MDI/LED code = 33)
Cause:
Switching the LC on, the software checks the output voltage on -P connector, and
expects that it is at a “steady state” value (if DC PUMP option is set to ON, see
paragraph 8.2.1 – HYDRO SETTINGS).
If the voltage is too low, this alarm occurs.
Troubleshooting:
Please check: