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AE0ZP0EC - AC-0 SSL SENSORED - User Manual
connected between NPOT (CNB#11) and GND and cascaded
with the potentiometer: if the potentiometer gets disconnected
on PPOT or NPOT, no current flow in this sense diode and the
voltage on the NPOT connection collapses down.
When the NPOT voltage is less than 0.3 V this alarm occurs.
This alarm occurs also when the NPOT voltage is higher than 2
Vdc (to detect also the condition of a broken sense diode).
- Remedy:
Check the voltage on NPOT (CNB#11) and the potentiometer
connections.
3) PROGRAM
LIFT
LEVER
MDI-PRC Code = 55
- Cause:
The SW continuously matches the potentiometer connected to
CNA#18 with the Main Lifting/Lowering pair request (CNB#9
and CNB#8).
When the TRUCK TYPE is set 2, the alarms occurs in the
following conditions:
- If both the Main Lifting and Main Lowering request are
disactive and the potentiometer voltage is higher than 60 mV
over either the MIN LIFT or the MIN LOWER (see
“Adjustments” submenu) setting.
- If the Main Lifting request is active and the potentiometer
voltage is higher than 200 mV over the MAX LIFT setting
(see “Adjustments” submenu).
- If the Main Lowering request is active and the potentiometer
voltage is higher than 200 mV over the MAX LOWER setting
(see “Adjustments” submenu).
- If the MIN LIFT setting is higher than the MAX LIFT setting.
- If the MIN LOWER setting is higher than the MAX LOWER
setting.
When the TRUCK TYPE is set 3, the alarms occurs in the
following conditions:
- If the Main Lowering request is disactive and the
potentiometer voltage is higher than the MIN LOWER (see
“Adjustments” submenu) setting.
- If the MIN LOWER setting is higher than the MAX LOWER
setting.
- Remedy:
Check the Main Lifting/Lowering pair (CNB#8 and CNB#9) and
the voltage on the potentiometer connected to CNA#18. (Use
the readings LIFTING SWITCH, DESCENT SWITCH and
LIFTING CONTROL in the TESTER to facilitate the
troubleshooting).
11.1.5 Five Blinks Alarms
1) ENCODER
ERROR
MDI-PRC Code = 70
- Cause:
Two consecutive readings of the encoder speed are too much
different in between: because of the inertiality of the system it is
not possible the encoder changes its speed a lot in a short
period. Probably an encoder failure has occurred (e.g. one or
two channels of the encoder are corrupted or disconnected).
- Remedy:
Check both the electric and the mechanical encoder
functionality. Frequently we experienced one of the two Sensor
bearing’s ring, slips inside its seat raising this alarm condition.
Also the electromagnetic noise on the sensor bearing can be a