Zapi ACE0, AC0 User Manual

ELECTRONIC • OLEODYNAMIC • INDUSTRIAL
EQUIPMENTS CONSTRUCTION

Via Parma, 59 – 42028 – POVIGLIO (RE) – ITALY
Tel [phone] (r.a.) – Fax [phone]
e-mail: [e-mail] – web: www.zapispa.it

EN

User Manual

COMBIAC0

&

ACE0

Copyright © 1975-2010 Zapi S.p.A.

All rights reserved

The contents of this publication is a ZAPI S.p.A. property; all related authorizations are covered
by Copyright. Any partial or total reproduction is prohibited.

Under no circumstances will Zapi S.p.A. be held responsible to third parties for damage caused
by the improper use of the present publication and of the device/devices described in it.

Zapi spa reserves the right to make changes or improvements to its products at any time and
without notice.
The present publication reflects the characteristics of the product described at the moment of
distribution. The publication therefore does not reflect any changes in the characteristics of the
product as a result of updating.

is a registered trademark property of Zapi S.p.A.

NOTES LEGEND

4 The symbol aboard is used inside this publication to indicate an annotation or a

suggestion you should pay attention.

U The symbol aboard is used inside this publication to indicate an action or a

characteristic very important as for security. Pay special attention to the
annotations pointed out with this symbol.

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Contents

1 INTRODUCTION ...................................................................................................................5

2 SPECIFICATION...................................................................................................................6

2.1 Technical specifications Combi AC0 / ACE0 ..............................................................6

2.2 Technical specifications Combi AC0 Power / ACE0 Power........................................6

2.3 Block diagrams ...........................................................................................................7

2.3.1 Traction control .............................................................................................7

2.3.2 Pump control.................................................................................................7

3 SPECIFICATION FOR THE INPUT DEVICES FILLING UP THE INSTALLATION KIT.......8

3.1 Digital inputs ...............................................................................................................8

3.1.1 DI0 ÷ DI10 technical details – 24 V system .................................................8

3.1.2 DI0 ÷ DI10 technical details – 48 V system .................................................8

3.1.3 Microswitches ...............................................................................................8

3.2 Analogue unit..............................................................................................................8

3.3 Other analogue control unit ........................................................................................9

3.4 Analogue motor thermal sensor input.........................................................................9

3.5 Speed feedback........................................................................................................10

4 INSTALLATION HINTS.......................................................................................................11

4.1 Material overview......................................................................................................11

4.1.1 Connection cables ......................................................................................11

4.1.2 Contactors...................................................................................................11

4.1.3 Fuses..........................................................................................................12

4.2 Installation of the hardware.......................................................................................12

4.2.1 Positioning and cooling of the controller .....................................................12

4.2.2 Wirings: power cables.................................................................................13

4.2.3 Wirings: CAN connections and possible interferences ...............................13

4.2.4 Wirings: I/O connections .............................................................................15

4.2.5 Connection of the encoder..........................................................................16

4.2.6 Main contactor and key connection ............................................................17

4.2.7 Insulation of truck frame..............................................................................17

4.3 Protection and safety features ..................................................................................18

4.3.1 Protection features......................................................................................18

4.3.2 Safety Features...........................................................................................19

4.4 EMC..........................................................................................................................19

4.5 Various suggestions .................................................................................................21

5 OPERATIONAL FEATURES ..............................................................................................22

5.1 Diagnosis ..................................................................................................................22

6 DESCRIPTION OF THE CONNECTORS............................................................................23

6.1 Connectors of the logic .............................................................................................23

6.1.1 CNA external connector..............................................................................23

6.1.2 CND internal connector...............................................................................25

6.1.3 CNE internal connector...............................................................................25

7 DESCRIPTION OF POWER CONNECTIONS ....................................................................26

8 DRAWINGS.........................................................................................................................27

8.1 Mechanical drawing ..................................................................................................27

8.2 Connection drawing ACE0........................................................................................28

8.3 Connection drawing CombiAC0................................................................................29

9 ONE SHOT INSTALLATION PROCEDURE.......................................................................30

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9.1 Sequence for Ac Inverter traction setting .................................................................31

10 PROGRAMMING & ADJUSTMENTS USING DIGITAL CONSOLE ..................................32

10.1 Adjustments via console........................................................................................... 32

10.2 Description of console (hand set) & connection .......................................................32

10.3 Description of the console menu ..............................................................................33

10.3.1 ACE0/ COMBIAC0 Menu ........................................................................... 33

10.4 Function configuration ..............................................................................................34

10.4.1 Config menu “SET OPTIONS” functions list............................................... 34

10.4.2 Config menu “ADJUSTMENTS” functions list ............................................ 38

10.4.3 Main menu “PARAMETER CHANGE” functions list................................... 41

10.4.4 Zapi menu “SPECIAL ADJUSTMENTS” functions list................................46

10.4.5 Main menu “TESTER” functions list ........................................................... 47

11 OTHER FUNCTIONS..........................................................................................................51

11.1 Description of console “SAVE” function ...................................................................51

11.2 Description of console “RESTORE” function............................................................ 52

11.3 Description of console “PROGRAM VACC” function................................................ 53

11.4 Description of the throttle regulation......................................................................... 55

11.5 Description of the battery charge detection setting .................................................. 56

12 ACE0 / COMBI AC0 ALARMS LIST...................................................................................58

12.1 Faults diagnostic system ..........................................................................................58

12.2 Alarms overview ....................................................................................................... 59

12.3 Analysis and troubleshooting of microcontroller alarms ...........................................61

12.4 Warnings overview ................................................................................................... 69

12.5 Analysis and troubleshooting of warnings ................................................................71

13 RECOMMENDED SPARE PARTS.....................................................................................78

14 PERIODIC MAINTENANCE TO BE REPEATED AT TIMES INDICATED.........................79

APPROVAL SIGNS

COMPANY FUNCTION INIZIALS SIGN

PROJECT MANAGER

TECHNICAL ELECTRONIC

MANAGER VISA

SALES MANAGER VISA

Publication N°: AF6ZP0AL
Edition: December 2010

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1 INTRODUCTION

The COMBI AC0 / ACE0 inverter has been developed to perform all the electric
functions that are usually presents in walkie and rider pallet trucks, stackers, low
level order pickers.
The controller can perform the following functions:

- Controller for Ac 700W to 2,5 Kw AC motors;

- Pump controller for series wounded DC motors up to 5 KW (only for Combi
AC0).

- Drivers for ON/OFF electrovalves and for two proportional valves (electro­distributor)

- Can bus interface

- Interface for canbus tiller

- Zapi patented sensorless and sense coil control

- 128 Kbytes Flash memory embedded.

- Software downloadable via Serial link or JTAG (internal connectors) or
Canbus (external connector)

- ESD protection on CAN BUS inputs CANL and CANH

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2 SPECIFICATION

2.1 Technical specifications Combi AC0 / ACE0

Inverter for traction AC asynchronous 3-phase motors plus chopper for DC series
pump motors.
Regenerative braking functions.
Digital control based upon microcontroller

Voltage:..................................................................................................24, 36, 48V

Inverter maximum current (24V, 36V):........................................ 220A (RMS) for 2'

Inverter maximum current (36V, 48V):........................................ 180A (RMS) for 2'

Continuous output current (24V, 36V): ..............................105A (RMS) continuous

Continuous output current (36V, 48V): ................................90A (RMS) continuous

Inverter operating frequency:...........................................................................8kHz

Dc chopper Maximum current (24V,36V)(1): ......................................... 270A for 2'

Dc chopper Maximum current (36V, 48V)(1): .........................................220A for 2’

Chopper Operating frequency(1): ..................................................................16kHz

External temperature working range:..................................................-40°C ÷ 40°C

Maximum heatsink temperature (start of the thermal cutback)........................ 85°C

4 Note(1): The DC chopper specifications are related to Combi AC0

2.2 Technical specifications Combi AC0 Power / ACE0 Power

Inverter for traction AC asynchronous 3-phase motors plus chopper for DC series
pump motors.
Regenerative braking functions.
Digital control based upon microcontroller

Voltage:..................................................................................................24, 36, 48V

Inverter maximum current (24V, 36V):........................................ 320A (RMS) for 2'

Inverter maximum current (36V, 48V):........................................ 280A (RMS) for 2'

Continuous output current (24V, 36V): ..............................130A (RMS) continuous

Continuous output current (36V, 48V): ..............................110A (RMS) continuous

Inverter operating frequency:...........................................................................8kHz

Dc chopper Maximum current (24V,36V)(1): ......................................... 270A for 2'

Dc chopper Maximum current (36V, 48V)(1): .........................................220A for 2’

Chopper Operating frequency(1): ..................................................................16kHz

External temperature working range:..................................................-40°C ÷ 40°C

Maximum heatsink temperature (start of the thermal cutback)........................ 85°C

4 Note(1): The DC chopper specifications are related to Combi AC0

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2.3 Block diagrams

2.3.1 Traction control

2.3.2 Pump control

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3 SPECIFICATION FOR THE INPUT DEVICES

FILLING UP THE INSTALLATION KIT

3.1 Digital inputs

COMBI AC0 / ACE0 digital inputs work in the voltage range [-Batt; +Batt].
Related command devices (microswitches) must be connected to +B (typically to
key voltage).
Pull-down resistance to –Batt is built-in.
Functional devices (like FW, BACK, LIFT, DESCENT, HORN, H&S, TILLER,
BELLY switches) are Normally Open; so related function becomes active when
the microswitch closes.
Safety devices (like CUTBACK switches) are Normally Closed; so related
function becomes active when the microswitches opens.
The DI11 and DI12, which are not available in the Sense Coil version, are
activated closing the external microswitch to –Batt.

3.1.1 DI0 ÷ DI10 technical details – 24 V system

- Switching threshold: 4V [±0,5V]

- Input impedance: 4,5kOhm [±0,5kOhm]

3.1.2 DI0 ÷ DI10 technical details – 48 V system

- Switching threshold: 4,3V [±0,5V]

- Input impedance: 13,5kOhm [±1kOhm]

3.1.3 Microswitches

- It is suggested that microswitches have a contact resistance lower than
0,1Ohm and a leakage current lower than 100µA.

- When full load connected, the voltage between the key switch contacts must
be lower than 0.1V.

- If the microswitch to be used has different characteristic, it is suggested to
discuss them and their application with Zapi technicians.

3.2 Analogue unit

The analog input can be connected to an accelerator unit if the Zapi can or serial
tiller is not used.
The accelerator unit can consist of a potentiometer or an Hall effect device.
It should be in a 3-wire configuration. The potentiometer is supplied through
CNA#25.
Potentiometer output signal must be input to CPOT1 (CNA#15) signal range is
from 0 to 10V.
If the pedal wire disconnection diagnosis is implemented (“PEDAL WIRE KO”
warning) the negative supply of the potentiometer has to be taken from NPOT
(CNA#30), otherwise has to be taken from CNA#5 (GND).

Potentiometer value should be in the 0.5 - 10 KOhm range; generally, the load
should be in the 1.5mA to 30mA range. Faults can occur if it is outside this range.

The standard connection for the potentiometer is the one in the Left side of next

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figure (potentiometer on one end at rest) in combination with a couple of Travel
demand switches . On request it is also possible the handling in the Right side of
next figure (potentiometer in the middle at rest) still in combination with a couple
of Travel demand switches.

The Procedure for automatic potentiometer signal acquisition is carried out using
the Hand Set. This enables adjustment of the minimum and maximum useful
signal level, in either direction.

3.3 Other analogue control unit

If the Zapi can tiller is not used, input CNA#30 can be used as analogue input
(the “PEDAL WIRE KO” warning is lost), whose typical application is a
proportional command to enable a lifting/lowering function. It is possible to use
this input for an alternative function like a proportional braking.
It should be in a 3 wire configuration. Potentiometer value should be in the 0.5­10Kohm range. Generally, the load should be in the 1.5mA to 30 mA range.
The CPOTL (CNA#30) signal range is from 0 to 10V.
Use CNA#25 (positive) and CNA#5 (negative) to supply it.

3.4 Analogue motor thermal sensor input

Input CNA#22 is an analogue input to receive an analogue thermal sensor signal
to measure the Traction Motor Winding Temperature. The analogue device
installed in the motor has to be specified, in order to insert the correct look-up
table in the software. A digital device can also be used.

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3.5 Speed feedback

The motor control is based upon the motor speed feedback (sensored software).
The speed transducer is an incremental encoder, with two phases shifted at 90°.
The encoder can be of different types :

- power supply: +12V / +5V

- electric output: open collector ( NPN ), push-pull.

COMBI AC0 / ACE0 could also be used without encoder, sensorless control.
This solution has to be discussed with Zapi technicians.

4 Note (1): The encoder resolution and the motor poles pair (the controller can

handle), is specified in the home page display of the handset showing following
headline:
CA0Z2A ZP1.00

That means:
CA0Z= COMBIAC0 Zapi controller
2 = motor’s poles pair number
A = 32 pulses/rev encoder

The encoder resolution is given by the second-last letter in the following list:
A = 32 pulses/rev
K = 48 pulses/rev
B = 64 pulses/rev
C = 80 pulses/rev

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4 INSTALLATION HINTS

In the description of these installation suggestions you will find some boxes of
different colours, they mean:

4 These are informations useful for anyone is working on the installation, or a

deeper examination of the content

U These are Warning boxes, they describe:

- operations that can lead to a failure of the electronic device or can be
dangerous or harmful for the operator;

- items which are important to guarantee system performance and safety

4.1 Material overview

Before to start it is necessary to have the required material for a correct
installation. Otherwise a wrong choice of cables or other parts could lead to
failures/ misbehaviour/ bad performances.

4.1.1 Connection cables

For the auxiliary circuits, use cables 0.5mm² section at least.
For power connections to the motor and to the battery, use cables having a
minimum section of 15 mm².
For the optimum inverter performance, the cables to the battery should be run
side by side and be as short as possible.

4.1.2 Contactors

IT IS STRONGLY RECCOMENDED TO USE A MAIN CONTACTOR to connect
and cut off the battery to the controller. Depending on the setting of a parameter
in the controller:

- the output which drives the main contactor coil is on/off (the coil is driven with
the full battery voltage).

- the output which drives the main contactor coil is switched at high frequency
(1 KHz) with a programmable duty cycle; this feature is useful to decrease
the power dissipation of the contactor coil.

U The EN1175 states the main Contactor is not mandatory (under proper

conditions); anyway it is recommended to protect the inverter against
reverse battery polarity and to cut off the battery from the power mosfets
when a failure in the three phase bridge occurs.

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4.1.3 Fuses

- Use a 6.3-10A Fuse for protection of the auxiliary circuits.

- For protection of the power unit, use a 350A fuse in the Battery Positive
connection. For special applications or requirements these values can be
reduced.

- For Safety reasons, we recommend the use of protected fuses in order to
prevent the spread of fused particles should the fuse blow.

4.2 Installation of the hardware

U Before doing any operation, ensure that the battery is disconnected and

when all the installation is completed start the machine with the drive
wheels raised from the floor to ensure that any installation error do not
compromise safety.
After operation, even with the Key Switch open, the internal capacitors may
remain charged for some time. For safe operation, we recommend that the
battery is disconnected, and a short circuit is made between Battery
Positive and Battery Negative power terminals of the chopper using a
Resistor between 10 Ohm and 100 Ohm. Minimum 5 Watts.

4.2.1 Positioning and cooling of the controller

CONTROLLER WITH BASE PLATE: Install the controller with the base-plate on

a flat metallic surface that is clean and unpainted; suggested characteristics are:
planarity 0.05 mm and rugosity 1.6 µm

- Apply a light layer of thermo-conductive grease between the two surfaces to
permit better heat dissipation.

- The heat generated by the power block must be dissipated. For this to be
possible, the compartment must be ventilated and the heat sink materials
ample.

- The heat sink material and system should be sized on the performance
requirement of the machine. Abnormal ambient air temperatures should be
considered. In situations where either ventilation is poor, or heat exchange is
difficult, forced air ventilation should be used.

- The thermal energy dissipated by the power block module varies and is
dependent on the current drawn and the duty cycle.

CONTROLLER WITH FINNED HEATSINK: Sometimes the base plate

installation cannot be adopted. Due to positioning problems or to the lack of a
thick enough truck frame, it is necessary to adopt a finned dissipation combined
with one or more fans.

- The air flux should hit the fins directly, to maximize the cooling effect.

- In addition to fans, also air ducting systems can be used to maintain low the
temperature of the controller.

- It is necessary to ensure that cold air is taken from outside the controller
compartment and hot air is easily pushed away from the controller
compartment.

- It is mandatory to avoid that the cooling air is recirculated inside the controller
compartment.

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4.2.2 Wirings: power cables

- The power cables length must be as short as possible to minimize power
losses.

- They must be tightened on controller power posts with a Torque of 7 ± 1.4
Nm

- The COMBIAC0 module should only be connected to a traction battery. Do
not use converters outputs or power supplies. For special applications please
contact the nearest Zapi Service Centre.

U Do not connect the controller to a battery with a nominal voltage different

than the value indicated on the controller label. A higher battery voltage
may cause MOS failure. A lower voltage may prevent the logic operating.

4.2.3 Wirings: CAN connections and possible interferences

4 CAN Stands for Controller Area Network. It is a communication protocol for real

time control applications. CAN operates at data rate of up to 1 Megabits per
second.
It was invented by the German company Bosch to be used in the car industry to
permit communication among the various electronic modules of a vehicle,
connected as illustrated in this image:

- The best cable for can connections is the twisted pair; if it is necessary to
increase the immunity of the system to disturbances, a good choice would
be to use a cable with a shield connected to the frame of the truck.
Sometimes it is sufficient a simple double wire cable or a duplex cable not
shielded.

- In a system like an industrial truck, where power cables carry hundreds of
Ampere, there are voltage drops due to the impedance of the cables, and
that could cause errors on the data transmitted through the can wires. In the
following figures there is an overview of wrong and right layouts of the cables
routing.

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U Wrong Layout:

Module

1

Module

Module

2

3

The red lines are can wires.
The black boxes are different modules, for example traction controller, pump
controller and display connected by canbus.
The black lines are the power cables.

This is apparently a good layout, but can bring to errors in the can line.
The best solution depends on the type of nodes (modules) connected in the
network.
If the modules are very different in terms of power, then the preferable
connection is the daisy chain.

U Correct Layout:

Module

1

Note: Module 1 power > Module 2 power > Module 3 power

The chain starts from the –BATT post of the controller that works with the
highest current, and the others are connected in a decreasing order of power.

Otherwise, if two controllers are similar in power (for example a traction and a
pump motor controller) and a third module works with less current, the best way
to deal this configuration is to create a common ground point (star configuration)

Module

2

Module

3

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U Correct Layout:

Module

1

Note: Module 1 power

In this case the power cables starting from the two similar controllers must be as
short as possible. Of course also the diameter of the cable concurs in the voltage
drops described before (higher diameter means lower impedance), so in this last
example the cable between the minus of the Battery and the common ground
point (pointed by the arrow in the image) must dimensioned taking into account
thermal and voltage drop problems.

4 Can advantages

The complexity of today systems needs more and more data, signal and
information must flow from a node to another. CAN is the solution to different
problems that arise from this complexity

- simplified design (readily available, multi sourced components and tools)

- lower costs (less and smaller cables )

- improved reliability (fewer connections)

- analysis of problems improved (easy connection with a pc to read the data
flowing through the cable)

Module

2

Module

3

≈ Module 2 power > Module 3 power

4.2.4 Wirings: I/O connections

- After crimping the cable, verify that all strands are entrapped in the wire
barrel.

- Verify that all the crimped contacts are completely inserted on the connector
cavities

U A cable connected to the wrong pin can lead to short circuits and failure;

so, before turning on the truck for the first time, verify with a multimeter the
continuity between the starting point and the end of a signal wire

- for information about the mating connector pin assignment see the paragraph
“description of the connectors”

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4.2.5 Connection of the encoder

1) COMBI AC0/ ACE0 card is fit for different types of encoder. To control AC
motor with Zapi inverter, it is necessary to install an incremental encoder with
2 phases shifted of 90°. The encoder power supply can be +5 or +12V. It can
have different electronic output.

AMPSEAL CONNECTOR

A25 +5V/+12V positive of encoder power supply.
A5 GND negative of encoder power supply.
A14 A phase A of encoder.
A13 B phase B of encoder.

2) Connection of encoder with open collector output; +5V power supply.

Connection of encoder with open collector output: +12V power supply.

U VERY IMPORTANT

It is necessary to specify in the order the type of encoder used, in terms of
power supply, electronic output and n° of pulses for revolution, because
the logic unit must be set in the correct way by Zapi.
The n° of pulses revolution the controller can handle is given by the
second-last letter in the software release name (see 3.5).

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4.2.6 Main contactor and key connection

- The connection of the main contactor can be carried out following the
drawing in the figure.

- The connection of the battery line switches must be carried out following
ZAPI instructions.

- If a mechanical battery line switch is installed, it is strongly recommended
that the key supply to the inverter is open together with power battery line
(see picture below); if not, the inverter may be damaged if the switch is
opened during a regenerative braking.

- An intrinsic protection is present inside the logic when the voltage on the
battery power connection overtakes 40% more than the battery nominal
voltage or if the key is switched off before the battery power line is
disconnected.

4.2.7 Insulation of truck frame

U As stated by EN-1175 “Safety of machinery – Industrial truck”, chapter 5.7,

“there shall be no electrical connection to the truck frame”. So the truck
frame has to be isolated from any electrical potential of the truck power
line.

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4.3 Protection and safety features

4.3.1 Protection features

The COMBI AC0/ ACE0 is protected against some controller injuries and
malfunctions:

- Battery polarity inversion

It is necessary to fit a LINE CONTACTOR to protect the controller against
reverse battery polarity and for safety reasons.

- Connection Errors

All inputs are protected against connection errors.

- Thermal protection

If the controller temperature exceeds 85°C, the maximum current is reduced in
proportion to the thermal increase. The temperature can never exceeds 105°C.

- External agents

The inverter is protected against dust and the spray of liquid to a degree of
protection meeting IP65. Nevertheless, it is suggested to carefully study
controller installation and position. With few simple shrewdness, the degree of
controller protection can be strongly increased.

- Protection against uncontrolled movements

The main contactor will not close if:

- The Power unit is not functioning.

- The Logic or CANBUS interface is not functioning perfectly.

- The Can Tiller is not operating correctly.

- Running microswitches are in open position.

- Low battery charge

when the battery charge is low, the maximum current is reduced to the half of the
maximum current programmed; additionally an alarm message is displayed.

- Protection against accidental Start up

A precise sequence of operations are necessary before the machine will start.
Operation cannot begin if these operations are not carried out correctly.
Requests for drive must be made after closing the key switch.

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4.3.2 Safety Features

U ZAPI controllers are designed according to the prEN954-1 specifications for

safety related parts of control system and to UNI EN1175-1 norm. The
safety of the machine is strongly related to installation; length, layout and
screening of electrical connections have to be carefully designed.
ZAPI is always available to cooperate with the customer in order to evaluate
installation and connection solutions. Furthermore, ZAPI is available to
develop new SW or HW solutions to improve the safety of the machine,
according to customer requirements.
Machine manufacturer holds the responsibility for the truck safety features
and related approval.

4.4 EMC

U EMC and ESD performances of an electronic system are strongly

influenced by the installation. Special attention must be given to the
lengths and the paths of the electric connections and the shields. This
situation is beyond ZAPI's control. Zapi can offer assistance and
suggestions, based on its years experience, on EMC related items.
However, ZAPI declines any responsibility for non-compliance,
malfunctions and failures, if correct testing is not made. The machine
manufacturer holds the responsability to carry out machine validation,
based on existing norms (EN12895 for industrial truck; EN50081-2 for other
applications).

EMC stands for Electromagnetic Compatibility, and it represents the studies and
the tests on the electromagnetical energy generated or received by an electrical
device.
So the analysis works in two directions:

1) The study of the emission problems, the disturbances generated by the

device and the possible countermeasure to prevent the propagation of that
energy; we talk about “conduction” issues when guiding structures such wires
and cables are involved, “radiated emissions” issues when it is studied the
propagation of electromagnetic energy through the open space. In our case
the origin of the disturbances can be found inside the controller with the
switching of the mosfets which are working at high frequency and generate

RF energy, but wires and cables have the key role to propagate the
disturbs because they works as antennas, so a good layout of the cables

and their shielding can solve the majority of the emission problems.

2) The study of the immunity can be divided in two main branches: protection

from electromagnetic fields and from electrostatic discharge.

The electromagnetic immunity concern the susceptibility of the controller

with regard to electromagnetic fields and their influence on the correct work
made by the electronic device.
There are well defined tests which the machine has to be exposed to.
These tests are carried out at determined levels of electromagnetic fields, to

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 19/79

simulate external undesired disturbances and verify the electronic devices
response.

3) The second type of immunity, ESD, concerns the prevention of the effects of

electric current due to excessive electric charge stored in an object. In fact,
when a charge is created on a material and it remains there, it becomes an
“electrostatic charge”; ESD happen when there is a rapid transfer from a
charged object to another. This rapid transfer has, in turn, two important
effects:

- this rapid charge transfer can determine, by induction, disturbs on the
signal wiring and thus create malfunctions; this effect is particularly
critical in modern machines, with serial communications (canbus) which
are spread everywhere on the truck and which carry critical informations.

- in the worst case and when the amount of charge is very high, the
discharge process can determine failures in the electronic devices; the
type of failure can vary from an intermittently malfunction to a completely
failure of the electronic device.

U IMPORTANT NOTE: it is always much easier and cheaper to avoid ESD

from being generated, than to increase the level of immunity of the
electronic devices.

There are different solutions for EMC issues, depending on level of emissions/
immunity required, the type of controller, materials and position of the wires and
electronic components.

4) EMISSIONS. Three ways can be followed to reduce the emissions:

A) SOURCE OF EMISSIONS: finding the main source of disturb and work

on it.

B) SHIELDING: enclosing contactor and controller in a shielded box; using

shielded cables;

C) LAYOUT: a good layout of the cables can minimize the antenna effect;

cables running nearby the truck frame or in iron channels connected to
truck frames is generally a suggested not expensive solution to reduce
the emission level.

5) ELECTROMAGNETIC IMMUNITY. The considerations made for emissions

are valid also for immunity. Additionally, further protection can be achieved
with ferrite beads and bypass capacitors.

6) ELECTROSTATIC IMMUNITY. Three ways can be followed to prevent

damages from ESD:

A) PREVENTION: when handling ESD-sensitive electronic parts, ensure the

operator is grounded; test grounding devices on a daily basis for correct
functioning; this precaution is particularly important during controller
handling in the storing and installation phase.

B) ISOLATION: use anti-static containers when transferring ESD-sensitive

material.

C) GROUNDING: when a complete isolation cannot be achieved, a good

grounding can divert the discharge current trough a “safe” path; the

Page - 20/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

frame of a truck can works like a “local earth ground”, absorbing excess

charge. So it is strongly suggested to connect to truck frame all the

parts of the truck which can be touched by the operator, who is
most of the time the source of ESD.

4.5 Various suggestions

- Never combine SCR low frequency choppers with COMBI AC0/ ACE0
modules. The filter capacitors contained in the COMBI AC0/ ACE0 module
would change the SCR chopper operation and subject to excessive
workload. If it is necessary to use two or more control units, like the chopper
should be of the Zapimos family.

During battery recharge, the COMBI AC0/ ACE0 must be completely
disconnected from the battery. Beside changing the charging current seen by the
battery charger, the module can be damaged by higher than normal voltages
supplied via the charger.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 21/79

5 OPERATIONAL FEATURES

- Speed control.

- Optimum behaviour on a slope if the speed feedback is used:
a) The motor speed follows the accelerator, starting a regenerative braking

if the speed overtakes the speed set-point

b) The system can perform an electrical stop on a ramp (the machine is

electrically hold on a slope) for a programmable time (if encoder is used)

- Stable speed in every position of the accelerator.

- Regenerative release braking based upon deceleration ramps.

- Regenerative braking when the accelerator pedal is partially released
(deceleration).

- Direction inversion with regenerative braking based upon deceleration ramp.

- Regenerative braking and direction inversion without contactors: only the
main contactor is present.

- The release braking ramp can be modulated by an analogue input, so that a
proportional brake feature is obtained.

- Optimum sensitivity at low speeds.

- Voltage boost at the start and with overload to obtain more torque (with
current control).

- The inverter can drive an electromechanical brake.

- High efficiency of motor and battery due to high frequency commutations.

- Modification of parameters through the programming console.

- Internal hour-meter with values that can be displayed on the console.

- Memory of the last five alarms with relative hour-meter and temperature
displayed on the console.

- Test function within console for checking main parameters.

- Direct communication between traction AC inverter and pump DC chopper.

- Backing forward and reverse options are available, with the tune and
the speed of the function programmable with Zapi handset.

5.1 Diagnosis

The microcontrollers continually monitor the inverter and the chopper and carry
out diagnostic procedures on the main functions.
The diagnosis is made in 4 points:

1) Diagnosis at start-up that checks: watch-dog, Current Sensors, Capacitor
charging, phase’s voltages, pump motor output, contactor drivers, can-bus
interface, presence of a start requirement, connection with the Can Tiller.

2) Standby Diagnosis that checks: watch-dog, phase’s voltages, pump motor
output, Contactor Drivers, Current Sensors, can-bus interface.

3) Driving diagnosis that checks: Watchdog, Current sensors, Contactor(s), can­bus interface.

4) Continuos Diagnosis that checks: power stage temperature, motor
temperature, Battery Voltage.

Error codes are provided in two ways. The digital console can be used, which
gives a detailed information about the failure; the failure code is also sent on the
Can-Bus.

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6 DESCRIPTION OF THE CONNECTORS

6.1 Connectors of the logic

6.1.1 CNA external connector

The connector used is an AMPSEAL plug 35 pins
A1 DI0 Input of the switch DI0. The input is activated when it is

connected to +Batt. With the logic hardware properly
configured it can be used to supply the EB and MC
positive. The default function is the controller “TILLER”
input.

A2 PEB Positive of the electromechanical brake coil.

A3 PAUX Positive supply for electrovalves: EV1, EV2, EV3, EV4,

EV5, LOWER EVP1, EVP2, HORN OUT and with the
logic hardware properly configured it can be used to
supply the EB. This input has to be supplied with
positive taken after main contactor.

A4 NEB Electro mechanic brake coil driver output; PWM

controlled; 2,5A maximum continuous current (driving
to –Batt).

A5 NENC Negative of the Encoder

A6 DI2 Input of the switch DI2. The input is activated when the

external switch is opened. The default function is the
controller “CUTBACK” input, opening the switch truck
speed is reduced.

A7 DI6 Input of the switch DI6. The input is activated when it is

connected to +Batt. The default function is the
controller “BELLY” input, closing the switch quick
inversion function is activated.

A8 EV5 Output of the ON/OFF electrovalve EV5; 1,5 A

maximum continuous current (driving to –Batt).

A9 EV1 Output of the ON/OFF electrovalve EV1; 1,5 A

maximum continuous current (driving to –Batt).

A10 +KEY Input of the key switch signal.

A11 EV2 Output of the ON/OFF electrovalve EV2; 1,5 A

maximum continuous current (driving to –Batt).

A12 NMC Main contactor coil driver output; PWM controlled; 2,5A

maximum continuous current (driving to –Batt).

A13 ENC B Traction motor encoder phase B.

A14 ENC A Traction motor encoder phase A.

A15 CPOTTR Accelerator potentiometer wiper.

A16 BACKING REV Inching (Backing) function, backward direction input. It

must be connected to the inching backward switch.
Active high.

A17 BACKING FOR Inching (Backing) function, forward direction input. It

must be connected to the inching forward switch.
Active high.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 23/79

A18 DI11 Input of the switch DI11. The input is activated when

the external switch is closed to -Batt. In the Sense Coil
version this input is connected to the AC motor sense
coil.

A19 DI5 Input of the switch DI5. The input is activated when it is

connected to +Batt. The default function is the
controller “HORN” input, closing the switch the horn
output is activated.

A20 DI1 Input of the switch DI1. The input is activated when it is

connected to +Batt. The default function is the
controller “DESCENT” enable input.

A21 DI12 Input of the switch DI12. The input is activated when

the external switch is closed to -Batt. It doesn’t have a
default function. In the Sense Coil version this input is
connected to the AC motor sense coil.

A22 THMOT Traction motor thermal sensor input. The internal pull-

up is a fixed 2mA (Max 5V) source current.

A23 EVP2 Output of the second proportional electrovalve driver

(driving to –Batt).

A24 LOWER EVP1 Negative of the lower proportional electrovalve driver

(driving to –Batt).

A25 PENC Encoder Positive Supply (+12/+5 Vdc)

A26 HORN OUT Negative of the protected horn electrovalve driver

(driving to –Batt).

A27 CANL Low level CAN-BUS voltage I/O.

A28 CANH High level CAN-BUS voltage I/O.

A29 DI9 Input of the switch DI9. The input is activated when the

external switch is opened. The default function is the
controller “CUTBACK2” input, opening the switch truck
speed is reduced.
If "H&S FUNCTION" option is PRESENT, input is
activate when it is connected to +Batt and function is
the controller "H&S" (Hard and Soft) request input,
closing this input truck performances are modified.
Depending of wiring and internal jumper configuration,
it may be necessary an external connection, through a
diode, between H&S input and TILLER input.

A30 CPOTL/NPOT Lift/Lower potentiometer wiper input. With the logic

hardware properly configured it can be used as
potentiometer negative reference. Using this input as
NPOT the diagnosis “PEDAL WIRE KO” is
implemented.

A31 DI4 Input of the switch DI4. The input is activated when it is

connected to +Batt. The default function is the
controller “REV” request input, closing this input truck
moves in backward direction.

A32 DI3 Input of the switch DI3. The input is activated when it is

connected to +Batt. The default function is the
controller “FORWARD” request input, closing this input
truck moves in forward direction.

A33 EV3 Output of the ON/OFF electrovalve EV3; 1,5 A

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A34 EV4 Output of the ON/OFF electrovalve EV4; 1,5 A

A35 DI7 Input of the switch DI7. The input is activated when it is

6.1.2 CND internal connector

The connector used is a 8 Vie STRIP

D1 Not used Internally disconnected

D2 NCLRXD Negative serial reception pin.

D3 PCLTXD Positive serial transmission pin.

D4 NCLTXD Negative serial transmission pin.

D5 GND Serial communication negative reference.

D6 +12 +12V serial communication supply.

D7 FLASH BOOT To connect this pin to GND (D8) for software download

D8 GND Serial communication negative reference.

This internal connector is used for software download with Zapi Flasher or for the

communication with Zapi Handset, or with lap-top, for controller setting an

diagnosis.

maximum continuous current (driving to –Batt).

maximum continuous current (driving to –Batt).

connected to +Batt. The default function is the
controller “LIFT” enable input.

via serial communication.

6.1.3 CNE internal connector

The connector used is a 16 Vie STRIP

E1 TMS JTAG interface, test mode selection

E2 +5 +5V JTAG interface supply.

E3 TD0 JTAG data output, microcontroller output.

E4 GND JTAG interface negative reference.

E5 CPUCLOCK CPU clock signal for JTAG interface.

E6 GND JTAG interface negative reference.

E7 TDI JTAG data input, microcontroller input.

E8 RESET* Logic reset signal.

E9 TRST* Test-System reset, microcontroller input.

E10 BRK-OUT Debug System: Break Out, microcontroller output.

E11 TCLK Debug System: JTAG clock, microcontroller input.

E12 GND JTAG interface negative reference.

E13 BRK-IN Debug System: Break In, microcontroller input.

E14 Not used Internally disconnected

E15 Not used Internally disconnected

E16 Not used Internally disconnected

This internal connector is used for software download via JTAG interface. The
connector is also used by Zapi technicians to realize the software debug.

microcontroller input.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 25/79

7 DESCRIPTION OF POWER CONNECTIONS

View of the power bars:

-B Negative of the battery.

+B Positive of the battery.

- P Output of the Pump Motor.

U; V; W Connection bars of the three motor phases; follow this sequence and the
indication on the motor.

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8 DRAWINGS

8.1 Mechanical drawing

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 27/79

8.2 Connection drawing ACE0

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8.3 Connection drawing CombiAC0

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 29/79

9 ONE SHOT INSTALLATION PROCEDURE

This section of the manual describes the basic connection procedure.
To move, the truck needs a minimum I/O outfit that it is mandatory: this minimum
outfit is listed in the Steps from 1 to 8 below.

Step1 Connect a potentiometer in the range 0.5 to 10Kohms, to modify the

wished speed between +12 (CNA#25) and GND (CNA#5). The
potentiometer wiper is connected to CPOTTR (CAN#15).

Step2 Connect two travel demand switches. The FWD travel demand must

be connected between a battery (key) voltage and CNA#32. The
REV travel demand must be connected between a battery (key)
voltage and CNA#31. Only one of them can be active at the same
time. They become active when connected to a key.

Step3 Connect a tiller (or seat) switch enabling/disabling the truck motion

between CNA#1 and a key voltage. It becomes active, enabling the
motion, when closed to a key voltage.

Step4 Connect the encoder in the motor shaft between CNA#25=VDD,

CNA#5=GND, CNA#14=CHA, CNA#13=CHB. The VDD voltage
may be 12V or 5V depending on a jumper inside the controller.

Step5 Connect the plus battery voltage through a key switch at the KEY

input CNA#10. This is the input for the controller supply.

Step6 Connect the Main Contactor Coil to CNA#10 and CNA#12. The

contactor must connect the battery positive to the +BATT power
terminal of the ACE0/ COMBI AC0.

Step7 Connect the motors and the minus battery to the corresponding

power terminals of the ACE0/ COMBI AC0.

Step8 Connect the Electromechanical Brake coil between CNA#2 and

CNA#4; when the tiller switch opens, the electromechanical brake
gets de-energized braking the truck.

The Steps from 1 to 8 describe the installation operations that is mandatory to do
in order your truck moves. Obviously the ACE0/ COMBI AC0 may execute a
wider set of optional services as:

1) to handle some speed reductions requests.

2) to handle an analogue sensor inside the motor.

3) to handle a proportional braking.

4) to handle a proportional forks lowering valve.

5) to handle a pump motor by a chopper.

6) to handle a belly switch, for truck quick inversion.

7) to handle a proportional input for the forks lifting/lowering.

8) to handle a second proportional electrovalve.

9) to handle a number of on/off E-valves.

10) to handle an Horn, driving a protected driver.

You must fill your I/O outfit with your optional functions. The optional functions
are shown in the connecting drawing and described in detail inside this manual.
The index may help you.

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9.1 Sequence for Ac Inverter traction setting

This section of the manual describes the basic ACE0/ COMBI AC0 set-up
procedure using the hand-set:
When the "Key Switch" is closed, if no alarms or errors are present, the Console
Display will be showing the Standard Zapi Opening Display (Home Display).
For the setting of your truck, use the procedure below.
If you need to reply the same setting on different controller, use the Save and
Restore sequence as described in the 13.1 and 13.2 paragraphs. Remember to
re-cycle the Key Switch if you make any changes to the chopper’s configuration.

Step1 Fill your setting with the Options you need.
Step2 Select the Battery Voltage.
Step3 Check the correct installation of all wires. Use the Console’s

TESTER function to assist.

Step4 Perform the accelerator signal acquisition procedure using the

Console “PROGRAM VACC”. Procedure is detailed on paragraph

13.3.

Step5 Set the “MAXIMUM CURRENT” Current parameter.
Step6 Set the ACCELERATION DELAY requirements for the machine.

Test the parameters in both directions.

Step7 Set the FREQUENCY CREEP level starting from 0.6 Hz. The

machine should just move when the accelerator microswitch is
closed. Increase the Level accordingly.

Step8 Set the Speed Reductions as required. Use the parameters of the

“cutback speed” family in the PARAMETER CHANGE menu to
specify the reduced maximum truck speed as a percentage of the
MAX SPEED FWD and MAX SPEED REV.

Step9 RELEASE BRAKING. Operate the machine at full speed. Release

the accelerator. Adjust the level to your requirement. If the machine
is a forklift, check the performance with and without load.

Step10 INVERSION BRAKING. Operate the machine at 25% full speed.

While travelling invert the Direction Switch. Set the suited Level of
Inversion Braking. When satisfactory, operate the machine at Full
Speed and repeat. If the machine is a Forklift, repeat the tests and
make adjustments with and without load. The unloaded full speed
condition should be the most representative condition.

Step11 Set the parameter MAX SPEED FORW.
Step12 Set the parameter MAX SPEED BACK (Reverse).
Step13 Test the truck on the maximum ramp specification at full load.
Step14 Make the choice for the truck behaviour on a slope. If the "Stop on

ramp" option is ON, set the desired value of "auxiliary time"
parameter.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 31/79

10 PROGRAMMING & ADJUSTMENTS

USING DIGITAL CONSOLE

10.1 Adjustments via console

4 To access and adjust all parameters it is necessary to use the Zapi console.

Since the COMBIAC0/ACE0 has no external serial connector, the Zapi console
has to be connected through a remote module, like a Zapi tiller card of a Zapi
display. This module has to be connected to the same Canbus line of the
inverter.
Otherwise it is possible to connect a pc to the Canbus line and use the PC CAN
Console software. This tool is more powerful than the standard serial console.

The following paragraphs describe the controller configuration in the case the
operator is using the Zapi console.

10.2 Description of console (hand set) & connection

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10.3 Description of the console menu

10.3.1 ACE0/ COMBIAC0 Menu

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 33/79

10.4 Function configuration

10.4.1 Config menu “SET OPTIONS” functions list

To enter the CONFIG MENU’ it is necessary to push in the same time the right
side top and left side top buttons. Then roll until the SET OPTION item appears
on the hand set display. Push the ENTER button.

Opening Zapi Display

CA0Z2A ZP1.00

24V 200A 00000

Push ROLL UP + SET UP simultaneously to enter
CONFIG MENU

The Display will show : SET MODEL

Press ROLL UP or ROLL DOWN button until SET
OPTIONS menu appear.

The Display will show : SET OPTIONS

Press ENTER to go in the SET OPTIONS MENU

The Display will show the first OPTION

Press SET UP or SET DOWN button in order to
modify the OPTION

The Display will show the new option

% ' %
' ' '

CONFIG MENU

SET MODEL

% ' '
' ' '

CONFIG MENU

SET OPTIONS

' % '
' ' '

HOURCOUNTER

RUNNING

' ' %
' ' %

HOURCOUNTER

KEYON

Press OUT to exit the menu

The Display will ask “ARE YOU SURE”.

Press ENTER for YES, or OUT for No

YES=ENTER NO=OUT

' % '
' ' '

The Display will show : SET OPTIONS

Press OUT again. Display now will show the
opening Zapi menu.

ARE YOU SURE?

' ' '
' % '

CONFIG MENU

SET OPTIONS

' ' '
' % '

' ' '
' % '

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1) TILLER SWITCH

This option handles the input CNA#1. This input opens when the operator
leaves the truck (tiller released). It is connected to a key voltage when the
operator is present. There are two levels:

- HANDLE: CNA#1 is managed as tiller input (no delay when
released).

- SEAT: CNA#1 is managed as seat input (with a delay when
released Æ debouncing function).

2) HOUR COUNTER

This option specifies the hour counter mode. It can be set one of two:

- RUNNING: The counter registers travel time only

- KEY ON: The counter registers when the "key" switch is closed
(controller supplied)

3) EVP TYPE

Analog/digital: defines the type of the EVP1 electrovalve, current controlled:
Analog: the related output manages a proportional valve, current controlled
Digital: the related output manages an on/off valve

4) EVP2 TYPE

Analog/digital: defines the type of the EVP2 electrovalve, current controlled:
Analog: the related output manages a proportional valve, current controlled
Digital: the related output manages an on/off valve

5) BATTERY CHECK

This option specifies the handling of the low battery charge detection.
There are tree levels:

- Level 0: Nothing happens, the battery charge level is calculated but is
ignored, it means no action is taken when the battery is discharged.

- Level 1: BATTERY LOW alarm is raised when the battery level is
calculated being less than or equal to 10% of the full charge. The
BATTERY LOW alarm inhibits the Lifting function.

- Level 2: BATTERY LOW alarm is raised when the battery level is
calculated being less than or equal to 10% of the full charge. The
BATTERY LOW alarm reduces the maximum truck speed down to 24%
of the full truck speed and it inhibits the Lifting function.

6) STOP ON RAMP

Only when the encoder is present, it is possible to electrically hold the truck

on a slope when the accelerator is released but the tiller is not released.

- ON: The stop on ramp feature (truck electrically hold on a ramp) is
managed for a time established by AUXILIARY TIME parameter.

- OFF: The stop on ramp feature is not performed. That means the truck
comes down slowly during the AUXILIARY TIME.

After this “auxiliary time”, the electromechanical brake is applied and the 3­phase bridge is released; if the electromechanical brake is not present the
truck comes down very slowly (see the AUX OUTPUT #1 option
programming and see also 13.4).

7) AUX OUTPUT #1

This option handles the digital output CNA#4. It can be used one of four:

- BRAKE: it drives an electromechanical Brake.

- HYDROCONT: it drives the contactor for a hydraulic steering function
when the direction input or a movement of the truck is detected.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 35/79

- EX.HYDRO: it drives the contactor for a hydraulic steering function when
the exclusive hydro input is active

- FREE: it is not used.

8) QUICK INVERSION

It can be set:

- NONE: The quick inversion function is not managed (no effect when
CNA#7 switches over).

- TIMED: The quick inversion function is timed.

- BELLY: The quick inversion function is managed but not timed.

9) SET MOTOR TEMPERATURE

It can be set:

- ANALOG: An analogue sensor for the control of the motor temperature
is connected to CNA#22. Typically the temperature sensor is a PTC
(positive thermal coefficient resistance), providing the sensor
characteristic to Zapi the correct table can be loaded in the controller
software.

- DIGITAL: A digital (on/off) sensor for the motor temperature monitoring
is connected to CNA#22 input.

- NONE: No temperature sensor is connected.

10) EV1 / 5

PRESENT/ABSENT: If set = PRESENT the diagnosis “EV1 / 5 DRIVER
SHORTED” relative to the load connected to CNA#9 or CNA#8 is activated.
When set = ABSENT the diagnosis is not implemented.

11) EV2

PRESENT/ABSENT: If set = PRESENT the diagnosis “EV2 DRIVER
SHORTED” relative to the load connected to CNA#11 is activated. When set
= ABSENT the diagnosis is not implemented.

12) EV3

PRESENT/ABSENT: If set = PRESENT the diagnosis “EV3 DRIVER
SHORTED” relative to the load connected to CNA#33 is activated. When set
= ABSENT the diagnosis is not implemented.

13) EV4

PRESENT/ABSENT: If set = PRESENT the diagnosis “EV4 DRIVER
SHORTED” relative to the load connected to CNA#34 is activated. When set
= ABSENT the diagnosis is not implemented.

14) DIAG. PEDAL WIRE KO

PRESENT/ABSENT: If set = PRESENT the diagnosis “PEDAL WIRE KO”,
relative to the connection of the two supply ends ( +12V, CNA#25; NPOT,
CNA#30) of the potentiometer in the accelerator , is activated. When set =
ABSENT the diagnosis is not implemented.

15) INVERSION MODE

ON/OFF: This parameter sets the logic of the Quick Inversion input. If set =
ON, the Quick Inversion switch is Normally Closed (function active when
switch opens). If set = OFF, the Quick Inversion switch is Normally Open
(function active when switch closes).

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16) HYDRO FUNCTION

KEY ON/RUNNING/NONE: Defines the activation of hydraulic steering
fuction.

- KEY ON: the function is activated at key-on.

- RNNING: the function is activated during a traction or braking request.

- NONE: the function is never activated.

17) M.C. FUNCTION

PRESENT/ABSENT: When is set PRESENT the Main Contactor is closed
after the controller key-on if the initial diagnosis pass. If is set ABSENT the
diagnosis are masked and M.C. is not closed after controller Key-on.

18) AUX OUT FUNCTION

PRESENT/ABSENT: When is set PRESENT the Electro mechanic Brake is
driven after a traction request if all the related diagnosis pass. If is set
ABSENT the diagnosis are masked and E.B. is not closed after a traction
request.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 37/79

10.4.2 Config menu “ADJUSTMENTS” functions list

To enter the CONFIG MENU it is necessary to push in the same time the right
side top and left side top buttons. Then roll until the ADJUSTMENTS item
appears on the hand set display. Push the ENTER button.

1) Opening Zapi Menu

CA0Z2A ZP1.00

24V 200A 00000

2) Press Top Left & Right Buttons to enter
CONFIG MENU

3) The Display will show: SET MODEL

4) Press ROLL UP button until ADJUSTMENTS
MENU appears

5) ADJUSTMENTS appears on the display

6) Press ENTER to go into the ADJUSTMENTS
MENU

7) The display will show: SET BATTERY TYPE

8) Press ROLL UP or ROLL DOWN button until
the desired parameter is reached

9) The desired parameter appears

TROTTLE 0 ZONE

% ' %
' ' '

CONFIG MENU

SET MODEL

% ' '
' ' '

CONFIG MENU

ADJUSTMENTS

' % '
' ' '

BATTERY TYPE

% ' '
% ' '

24V

3%

10) Press SET UP or SET DOWN button to modify
the adjustment

TROTTLE 0 ZONE

11) Press OUT

12) Press ENTER to confirm

13) Repeat the same from 5 to 12 points for the
other adjustments

' ' %
' ' %

7%

' ' '
' % '

' % '
' ' '

1) SET BATTERY TYPE

Selects the nominal battery voltage.

2) ADJUST BATTERY

Fine adjustment of the battery voltage measured by the controller.

3) THROTTLE 0 ZONE

Establishes a deadband in the accelerator input curve.

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4) THROTTLE X POINT

This parameter, together with the THROTTLE Y POINT, changes the
characteristic of the accelerator input curve : when the accelerator is de­pressed to X point per cent, the corresponding truck speed is Y point per cent
of the Maximum truck speed. The relationship between the accelerator
position and the truck speed is linear between the THROTTLE 0 ZONE and
the X point and also between the X point and the maximum accelerator
position but with two different slopes.

5) THROTTLE Y POINT

This parameter, together with the THROTTLE X POINT, changes the
characteristic of the accelerator input curve (see also paragraph 13.5): when
the accelerator is de-pressed to X point per cent, the corresponding truck
speed is Y point per cent of the Maximum truck speed. The relationship
between the accelerator position and the truck speed is linear between the
THROTTLE 0 ZONE and the X point and also between the X point and the
maximum accelerator position but with two different slope.

6) BAT. MIN ADJ.
Adjust the lower level of the battery charge table (Level 0 to 9).

7) BAT. MAX ADJ.
Adjust the upper level of the battery charge table (Level 0 to 9).

8) LOAD HM FROM MDI

When set On, the HourMeter of the Controller is transferred and recorded on

the HourMeter of the MDI CAN, connected to CAN BUS network.

9) CHECK UP DONE

It can be ON/OFF. If it is ON it is possible to reset the last maintenance hour­counter and the “CHECK UP NEEDED” warning.

10) CHECK UP TYPE

It specifies the handling of the CHECK UP NEEDED warning:

- NONE: No CHECK UP NEENED warning

- OPTION#1: CHECK UP NEENED warning shown on the hand set and

MDI/DISPLAY after 300 hours

- OPTION#2: Equal to OPTION#1 but Speed reduction after 340 hours

- OPTION#3: Equal to OPTION#2 but the truck definitively stops after 380

hours

11) ) MIN LIFT

This parameter stores the minimum voltage of lifting potentiometer output
connected to CNA#30. The min value acquisition is done closing the Lift SW
and bringing the potentiometer in its min output position.

12) MAX LIFT

This parameter stores the maximum voltage of lifting potentiometer output
connected to CNA#30. The max value acquisition is done closing the Lift SW
and bringing the potentiometer in its max output position.

13) MIN LOWER

%. This parameter stores the minimum voltage of lowering potentiometer
output connected to CNA#30. The min value acquisition is done closing the
DESCENT SW (DI1) and bringing the potentiometer in its min output

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 39/79

position.

14) MAX LOWER

%. This parameter stores the maximum voltage of lifting potentiometer output
connected to CNA#30. The min value acquisition is done closing the
DESCENT SW (DI1) and bringing the potentiometer in its min output
position.

15) PWM CHOP. START

%. This parameter stores the PWM value applied to MC coil and AUX COIL
for the first second of the output activation. It is expressed in percentage of
battery voltage.

16) PWM CHOP. WORK

%. This parameter stores the PWM value applied to MC coil and AUX COIL
after the first second of the output activation. It is expressed in percentage of
battery voltage.

17) PWM ON MAIN CONT

- OFF: the inverter applies the battery voltage to the loads on the main

contactor coil connected to CNA#12.

- ON: the PWM reduces the voltage on the main contactor coil down to the

value programmed with “PWM CHOP. START” and “PWM CHOP.
WORK” parameters.

18) PWM ON AUX OUT

- OFF: the inverter applies the battery voltage to the loads on the auxiliary
output coil connected to CAN#4.

- ON: the PWM reduces the voltage on the main contactor coil down to the

value programmed with “PWM CHOP. START” and “PWM CHOP.
WORK” parameters.

Page - 40/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

10.4.3 Main menu “PARAMETER CHANGE” functions list

To enter the MAIN MENU’ it is just necessary to push the ENTER button from the
home display in the hand set.

1) Opening Zapi Menu

CA0Z2A ZP1.00

24V 200A 00000

2) Press ENTER to go into the General Menu

3) The Display will show: PARAMETER CHANGE

4) Press ENTER to go into the Parameter
Change menu

PARAMETER CHANGE

5) The Display will show the first parameter

6) Press either ROLL UP and ROLL DOWN to
display the next parameter

7) The names of the Parameters appear on the
Display

RELEASE BRAKING

8) When the desired Parameter appears, it’s
possible to change the Level by pressing either
SET UP or SET DOWN buttons.

9) The Display will show the new level.

RELEASE BRAKING

' % '
' ' '

MAIN MENU

' % '
' ' '

ACC DELAY

LEVEL = 5

% ' '
% ' '

LEVEL = 5

' ' %
' ' %

LEVEL = 2

10) When you are satisfied with the result of the
changes you have made, press OUT.

11) The Display asks: “ARE YOU SURE?”

12) Press ENTER to accept the changes, or press
OUT to discard them.

13) The Display will show

ARE YOU SURE?

PARAMETER CHANGE

' ' '
' % '

YES=ENTER

NO=OUT

' ' '
' % '

MAIN MENU

1) ACCELER. DELAY

Seconds. It determines the acceleration ramp. The parameter sets the time
needed to speed up the traction motor from 0Hz to 100Hz.

2) RELEASE BRAKING

Seconds. It controls the deceleration ramp when the travel request is
released. The parameter sets the time needed to decelerate the traction
motor from 100Hz to 0Hz.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 41/79

3) TILLER BRAKING

Seconds. It controls the deceleration ramp when the tiller is in braking
position (released). The parameter sets the time needed to decelerate the
traction motor from 100Hz to 0Hz

4) INVERS. BRAKING

Seconds. It controls the deceleration ramp when the direction switch is
inverted during travel. The parameter sets the time needed to decelerate the

traction motor from 100Hz to 0Hz.

5) DECEL. BRAKING

Seconds. It controls the deceleration ramp when the accelerator has turned
down but not completely released. The parameter sets the time needed to

decelerate the traction motor from 100Hz to 0Hz.

6) PEDAL BRAKING

Seconds. This parameter determines the deceleration ramp when the travel
request is released and the brake pedal switch is closed.

It sets the time

needed to decelerate the traction motor from 100Hz to 0Hz.

7) SPEED LIMIT BRK

Seconds. It controls the deceleration ramp when a speed reduction has been
activated. The parameter sets the time needed to decelerate the traction

motor from 100Hz to 0Hz.

8) MAX SPEED FWD
Percentage. It determines the maximum speed in forward direction.

9) MAX SPEED BWD
Percentage. It determines the maximum speed in backward direction.

10) HYD SPEED FINE

Percentage. Fine adjustment of the pump motor steering function speed.

11) HYDRO COMPENSATION

Percentage. Adjustment of the compensation function when the pump motor
steering function is active.

12) CUTBACK SPEED 1

Typically from 10% to 100%. It determines the percentage of the max speed
applied when the cutback switch 1, CNA#6 connector, is active. When set to
100% the speed reduction is ineffective.

13) H&S CUTBACK / CB2

Typically from 10% to 100%. It determines the percentage of the max speed
applied when the Hard & Soft function (or cutback 2 function if "H&S
FUNCTION" is ABSENT), CNA#29 connector, is active. When set to 100%
the speed reduction is ineffective.

14) FREQUENCY CREEP

Hz value. This is the minimum speed applied when the forward or reverse
switch is closed, but the accelerator is at its minimum.

15) MAXIMUM CURRENT

Maximum level of the current (percentage of the maximum current of the

Page - 42/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

controller).

16) ACCELERATION SMOOTH

It gives a parabolic form to the acceleration ramp.

17) INVERSION SMOOTH

It gives a parabolic form to the acceleration ramp after a direction inversion.

18) STOP SMOOTH

Hz. It sets the level of frequency where the smooth effect of the acceleration
parabolic form ends.

19) BRK SMOOTH

It gives a parabolic form to the deceleration ramp.

20) STOP BRK SMOOTH

Hz. It sets the level of frequency where the smooth effect of the deceleration
parabolic form ends.

21) AUXILIARY TIME

Time units value (seconds). For the encoder version, it determines the time
duration the truck is hold on the ramp if the STOP ON RAMP option is ON.

22) HYDRO TIME

Sec. It determines the time duration the pump motor is driven after the
hydraulic request is released.

23) PUMP IMAX

Level 0 to 9. Set the maximum current for the pump motor.

24) PUMP ACCELERATION DELAY

In seconds. Set the acceleration ramp for the pump motor.

25) PUMP DECELERATION DELAY

In seconds. Set the deceleration ramp for the pump motor.

26) SPEED LIMIT

Percentage. It limits the maximum speed of the lifting function. Percentage of
the maximum voltage applied to the pump motor.

27) CREEP SPEED

Percentage. It sets the minimum speed (percentage of voltage applied) for
the pump motor. Percentage of the maximum voltage applied to the pump
motor when the Lift SW is closed.

28) COMPENSATION

From 0% to 100% This parameter sets the voltage compensation (∆V)
applied to the motor when the proportional lifting function is active. The value
of this ∆V applied to the motor is a function of the motor current. Aim of this
function is to reduce, as for as possible, the speed difference between the
truck loaded and unloaded.

29) MIN EVP

0 to 100. This parameter determines the minimum voltage applied on the
EVP1 when the position of the potentiometer is at the minimum. This

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 43/79

parameter is not effective if the EVP1 is programmed like a On/Off valve.

30) MAX EVP

0 to 100. This parameter determines the maximum voltage applied on the
EVP1 when the position of the potentiometer is at the maximum. If the EVP1
is programmed like a On/Off valve this parameter determines the fixed
voltage applied on the electrovalve coil.

31) MIN EVP2

0 to 100. This parameter determines the minimum voltage applied on the
EVP2 when the position of the potentiometer is at the minimum. This
parameter is not effective if the EVP2 is programmed like a On/Off valve.

32) MAX EVP2

0 to 100. This parameter determines the maximum voltage applied on the
EVP2 when the position of the potentiometer is at the maximum. If the EVP2
is programmed like a On/Off valve this parameter determines the fixed
voltage applied on the electrovalve coil.

33) EVP OPEN DELAY

In seconds. It defines the opening ramp of the EVP1 electrovalve when
related output is set as Analog (refer to Set Option menu).

34) EVP CLOSE DELAY

In seconds. It defines the closing ramp of the EVP1 electrovalve when
related output is set as Analog (refer to Set Option menu).

35) EVP OPEN DELAY2

In seconds. It defines the opening ramp of the EVP2 electrovalve, when
related output is set as Analog (refer to Set Option menu).

36) EVP CLOSE DELAY2

In seconds. It defines the closing ramp of the EVP2 electrovalve, when
related output is set as Analog (refer to Set Option menu).

37) BACK SPEED

This is the percentage of the max speed that the traction can reach when the
inching function is active. The inching function can be used only if the option
TILLER SWITCH is set to SEAT.

38) BACKING TIME

This is the time duration of the inching function.

Page - 44/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

PARAMETER UNIT

0 1 2 3 4 5 6 7 8 9

ACCELERATION DELAY Sec. From 0 to 10 sec., resolution of 0.1
RELEASE BRAKING Sec. From 0 to 10 sec., resolution of 0.1
TILLER BRAKING Sec. From 0 to 10 sec., resolution of 0.1
INVERSION BRAKING Sec. From 0 to 10 sec., resolut ion of 0.1
DECEL. BRAKING Sec. From 0 to 10 sec., resolution of 0.1

PEDAL BRAKING Sec. From 0 to 10 sec., resolution of 0.1
SPEED LIMIT BRAKING Sec. From 0 to 10 sec., resolution of 0.1

MAX SPEED FW % From 0% to 100%, resolution of 1%
MAX SPEED BW % From 0% to 100%, resol ut io n of 1%
CUTBACK SPEED 1 %Max Sp From 0% to 100%, resolution of 1%
H&S CUTBACK / CB2 %Max Sp From 0% to 100%, resolution of 1%
FREQUENCY CREEP Hz From 0.6 to 4.0 Hz, resolution of 0.1 Hz
MAXIMUM CURRENT %IMAX From 0% to 100%, resolution of 1%
ACC SMOOTH Num. From 1 to 5, resolution 0,1
INV SMOOTH Num. From 1 to 5, resolution 0,1

PROGRAMMED LEVEL

STOP SMOOTH Hz From 3 to 20 Hz, resolution of 1Hz
BRK SMOOTH Num. From 1 to 5, resolution 0,1
STOP BRAKE SMOOTH Hz From 3 to 20 Hz, resolution of 1Hz
AUXILIARY TIME Sec. From 0 to 10 sec., resolution of 0.1
HYDRO TIME Sec. From 0 to 10 sec., resolution of 0.1
PUMP IMAX % From 50% to 100% of IMAX, resolution of 5%
PUMP ACC. DELAY Sec. From 0 to 10 sec., resolution of 0.1

PUMP DEC. DELAY Sec. From 0 to 10 sec., resolution of 0.1
SPEED LIMIT % From 0% to 100%, resolution of 1%
CREEP SPEED % From 0% to 100%, resolution of 1%

COMPENSATION % From 0% to 100%, resolution of 1%
HYD SPEED FINE % From 0% to 100%, resolution of 1%
HYDRO COMPENSATION % From 0% to 100%, resolution of 1%
MIN EVP % From 0% to 100%, resolution of 0.1%
MAX EVP % From 0% to 100%, resolution of 0.1%
MIN EVP2 % From 0% to 100%, resolution of 0.1%
MAX EVP2 % From 0% to 100%, resolution of 0.1%
EVP OPEN DELAY Sec. From 0 to 25.5 sec., resolution of 0.1
EVP CLOSE DELAY Sec. From 0 to 25.5 sec., resolution of 0.1
EVP OPEN DELAY2 Sec. From 0 to 25.5 sec., resolution of 0.1
EVP CLOSE DELAY2 Sec. From 0 to 25.5 sec., resolution of 0.1
BACK SPEED % From 0% to 100%, resolution of 1%
BACKING TIME Sec. From 0 to 10 sec., resolution of 1

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 45/79

10.4.4 Zapi menu “SPECIAL ADJUSTMENTS” functions list

4 Note: the below set-up description is for skilled persons only: if you aren’t, please

keep your hands off. To enter this Zapi hidden menu a special procedure is
required. Ask for this procedure, directly to a Zapi technician.
In the SPECIAL ADJUSTMENTS functions list, there are factory adjusted
parameters only.

1) ADJUSTMENT #01

(Factory adjusted). % value. This is the Gain of the first Current Sensing
Amplifier of traction motor.

NOTE: only Zapi technicians should change this value

2) ADJUSTMENT#02

(Factory adjusted). % value. This is the Gain of the second Current Sensing
Amplifier of traction motor.

NOTE: only Zapi technicians should change this value

3) SET CURRENT

(Factory adjusted). This is the traction motor maximum current.

4) SET TEMPERATURE

Set the temperature offset to have the correct value reading. This is a fine
calibration of the controller temperature sensor.

5) ADJUSTMENT#03

(Factory adjusted). % value. This is the gain of the Current Sensing Amplifier
of pump motor.

6) SET CURRENT PUMP

(Factory adjusted). This is the pump motor maximum current.

7) HIGH ADDRESS

To be used to have access to special memory address.

NOTE: only Zapi technicians should change this value

8) DITHER AMPLITUDE

It is the dither signal amplitude. The dither signal is a square wave which is
overlapped to the proportional valves set point. In this way the proportional
valves response to set point variations is optimized. This parameter is a
percentage of the valves maximum current. It can be adjusted in the 0% to

20.3% by nine levels. Setting the parameter to 0% means the dither isn’t
used.

9) DITHER FREQUENCY

It is the dither signal frequency. It can be used one of three:

- 0: the dither signal frequency is 62.5 Hz

- 1: the dither signal frequency is 83 Hz

- 2: the dither signal frequency is 125 Hz.

Page - 46/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

10.4.5 Main menu “TESTER” functions list

The TESTER functions are a real time feedback measurements of the state of
the controller/motor/command devices. It is possible to know the state (active /
off) of the digital I/Os, the voltage value of the analog inputs and the state of the
main variables used in the motor and hydraulics control. Enter the home page in
the hand-set display and roll for the TESTER item.

1) BATTERY VOLTAGE

Voltage value with 1 decimal digit. Battery voltage value measured at the key
on.

2) BATTERY CURRENT

Battery current in Ampere. This value is not directly measured by the
controller but is software computed through the instantaneous values of
battery voltage and percentage of charge.

3) MOTOR VOLTAGE

Percentage value. It is the voltage generated by the inverter expressed in
percent of the actual battery voltage. 100% means the sine wave width is
close to the actual battery voltage; 0% means the sine wave width is null.

4) VOLTAGE BOOSTER

Percentage value. It is the booster contribute to the voltage really supplied to
the motor expressed in per cent of the actual battery voltage. (Note: when
DC_LINK COMPENSATION is set ON, the VOLTAGE BOOSTER reading
will not match perfectly the booster setting because this latest one is
calculated respect to the nominal battery voltage; VOLTAGE BOOSTER is
expressed respect to the actual battery voltage).

5) FREQUENCY

Hz value. This is the frequency of the sine waves the inverter is supplying.

6) ENCODER

Hz value. This is the speed of the motor measured with the encoder and
expressed in the same unit of the FREQUENCY reading.

7) SLIP VALUE

Hz value. This is the slip between the frequency and the speed of the motor
(SLIP VALUE = FREQUENCY-ENCODER).

8) CURRENT RMS

Ampere value. Root Mean Square value of the line current in the motor.

9) BATTERY CHARGE

Percentage value. It supplies the residual charge of the battery as a
percentage of the full charge level.

10) TEMPERATURE

°C value. This is the temperature of the inverter base plate. This temperature
is used for the HIGH TEMPERATURE alarm detection.

11) MOTOR TEMPERATURE

°C value. This is the temperature of the motor windings picked up with an
analog sensor inside the motor. Normally this sensor is a PTC Philips
KTY84-130. This temperature is used only to raise a warning in the hand set

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 47/79

when the motor temperature overtakes the MOTOR OVERTEMP setting.

12) PUMP CURRENT

Ampere. It is the continuous current in the pump motor.

13) PUMP VMN

It is the voltage applied to the pump motor. Expressed in percentage of the
maximum voltage.

14) ACCELERATOR

From 0.0V to 5.0V. The voltage on the wiper of the accelerator (CPOT on
CNA#15) is halved inside the controller and then recorded on this reading.
That means the actual wiper voltage is in the range 0 to 10V meanwhile the
corresponding ACCELERATOR reading is in the range 0.0 to 5.0Vdc.

15) LIFTING CONTROL

From 0.0 to 5.0V. The voltage on the wiper of the accelerator (CPOTLIFT on
CNA#30) is halved inside the controller and then recorded on this
reading.That means the actual wiper voltage is in the range 0 to 10V
meanwhile the corresponding ACCELERATOR reading is in the range 0.0 to

5.0Vdc

16) DI0/TILLER SWITCH

ON/OFF. This is the level of the digital input CNA#1 for the Tiller input.

- ON +VB = When it is closed to a battery (key) voltage, the Tiller input is

Active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is

connected to GND), the Tiller input is not active.

17) DI1/DESCENT SWITCH

ON/OFF. This is the level of the digital input CNA#20 for the Lowering
request:

- ON +VB = When it is closed to a battery (key) voltage, the Lowering

request is Active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is

connected to GND), the Lowering request is not active.

18) DI2/CUTBACK SWITCH

ON/OFF. This is the level of the digital input CNA#6:

- ON GND = When it is not closed to a battery (key) voltage (or connected

to GND) the CUTBACK request is active.

- OFF +VB = When it is closed to a battery (key) voltage the CUTBACK

request is not active.

19) DI3/FORWARD SWITCH

ON/OFF. This is the level of the digital input CNA#32 for the forward travel
demand:

- ON +VB = When it is closed to a battery (key) voltage, the Forward

Travel demand is Active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is

connected to GND), the Forward Travel demand is not active.

20) DI4/REV SWITCH

ON/OFF. This is the level of the digital input CNA#31 for the backward travel
demand:

Page - 48/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

- ON +VB = When it is closed to a battery (key) voltage, the Backward
Travel demand is Active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is
connected to GND), the Backward Travel demand is not active.

21) DI5/HORN SWITCH

ON/OFF. This is the level of the digital CNA#19:

- ON +VB = When it is closed to a battery (key) voltage the HORN request
is active.

- OFF GND = When it is not closed to a battery (key) voltage (or
connected to GND) the HORN request is not active.

22) DI6/BELLY SWITCH

ON/OFF. This is the level of the digital input CNA#7 ( belly button):

- ON +VB = When it is closed to a battery (key) voltage, the request of the
Belly (to stop the movement) is active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is
connected to GND), the Belly request is not active.

23) DI7/LIFT SWITCH

ON/OFF. This is the level of the digital input CNA#35:

- ON +VB = When it is closed to a battery (key) voltage the voltage the
LIFTING request is active.

- OFF GND = When it is not closed to a battery (key) voltage (or
connected to GND) the voltage the LIFTING request is not active.

24) DI8 / BACKING FOR

ON/OFF. This is the level of the digital input CNA#17 for the inching forward
request:

- ON +VB = When it is closed to a battery (key) voltage the forward
inching demand is active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is
connected to GND) the forward inching demand is not active.

25) DI9/ H&S SWITCH [H&S FUNCTION option PRESENT]

ON/OFF. This is the level of the digital input CNA#29 for the Hard & Soft
request. With the H&S service is possible to turn the truck moving (at
reduced speed) only by acting the H&S switch, and the accelerator, without
to let down the tiller :

- ON +VB = When it is closed to a battery (key) voltage, the H&S request
is Active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is
connected to GND), the H&S request is not active.

26) DI9/CUTBACK SWITCH 2 [H&S FUNCTION option ABSENT]

ON/OFF. This is the level of the digital input CNA#29:

- ON GND = When it is not closed to a battery (key) voltage (or connected
to GND) the CUTBACK2 request is active.

- OFF +VB = When it is closed to a battery (key) voltage the CUTBACK2
request is not active

27) DI10 / BACKING REV

ON/OFF. This is the level of the digital input CNA#16 for the inching reverse
request:

- ON +VB = When it is closed to a battery (key) voltage, the reverse

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 49/79

inching demand is active.

- OFF GND = When it is not connected to a battery (key) voltage (or it is
connected to GND), the reverse demand is not active.

28) DI11 SWITCH

ON/OFF. This is the level of the CNA#18 digital input:

- ON GND = When CNA#18 is not closed to a battery (key) voltage (or
connected to GND) the digital input#11 is active.

- OFF +VB = When CNA#18 is closed to a battery (key) voltage the digital
input#11 is not active.

29) DI12 SWITCH

ON/OFF. This is the level of the digital input CNA#21:

- ON +VB = When it is closed to a battery (key) voltage the digital input#12
is active.

- OFF GND = When it is not closed to a battery (key) voltage (or it is
connected to GND) the digital input#12 is not active.

30) SET POINT EVP

This parameter shows the setpoint of EVP valve.

31) SET POINT EVP2

Show the percentage of voltage applied to EVP2 valve.

32) OUTPUT EV1

On/Off: determines if the valve EV1 or EV5 are open or closed.

33) OUTPUT EV2

On/off: determines if the valve EV2 is open or closed.

34) OUTPUT EV3

On/off: determines if the valve EV3 is open or closed.

35) OUTPUT EV4

On/off: determines if the valve EV4 is open or closed.

Page - 50/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

11 OTHER FUNCTIONS

11.1 Description of console “SAVE” function

The SAVE function allows the operator to transmit the Parameter values and
Configuration data of the controller into the Console memory. It is possible to
load 64 different programmes. The information saved in the Console memory
can then be reloaded into another controller using the RESTORE function.
The data that is available via the SAVE function are listed here below:

- All Parameter Values (PARAMETER CHANGE).

- Options (SET. OPTIONS).

- The Level of the Battery (ADJUST BATTERY).
Flow Chart showing how to use the SAVE function of the Digital Console.

Opening Zapi Display

CA0Z2A ZP1.00

24V 200A 00000

Press ENTER to go into the General menu

The Display will show :

Press ROLL UP or ROLL DOWN button until SAVE
PARAM. appears on the display

The Display will show :

PARAMETER CHANGE

SAVE PARAMETERS

Press ENTER to go into the SAVE function

If this feature has been used before, the type of
controller data stored appears on the top Main with

SELECT: MOD. 00

' % '
' ' '

MAIN MENU

% ' '
% ' '

MAIN MENU

' % '
' ' '

FREE

a 2 digit reference

Keep pressing either ROLL UP or ROLL DOWN
keys until the second Main indicates a FREE

% ' '
% ' '

storage facility

SELECT: MOD. 01

FREE

Press ENTER to commence SAVE routine

You can see the items that are being stored whilst
the SAVE routine is happening

When finished, the Console shows :

ACCEL. DELAY (ECC.)

SELECT: MOD. 01

Press OUT to return to the Opening Zapi Display

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 51/79

' % '
' ' '

READING …

FREE

' ' '
' % '

4 NOTE: in reality the SAVE and RESTORE function requires the Windows PC-

Console.

11.2 Description of console “RESTORE” function

The RESTORE PARAM function allows transfer of the Console’s stored data into
the memory of the controller. This is achieved in a fast and easy way using the
method previously used with the SAVE PARAM. function.
The data that is available on the RESTORE PARAM. Function are listed here
below:

- All Parameter Values (PARAMETER CHANGE).

- Options (SET OPTIONS)

- The level of the Battery (ADJUST BATTERY)
ATTENTION: When the RESTORE operation is made, all data in the controller
memory will be written over and replaced with data being restored.
Flow Chart showing how to use the RESTORE function of the Digital Console.

Opening Zapi Display

CA0Z2A ZP1.00

24V 200A 00000

Press ENTER to go into the General menu

The Display will show :

Press ROLL UP or ROLL DOWN button until
RESTORE PARAM. appears on the display

The Display will show :

Press ENTER to go into the RESTORE PARAM.
function

The Display shows the type of Model stored, with a
Code Number

PARAMETER CHANGE

RESTORE PARAM.

SELECT : MOD. 00

Keep pressing either ROLL UP and ROLL DOWN
buttons until the desired model appears on the

' % '
' ' '

MAIN MENU

% ' '
% ' '

MAIN MENU

' % '
' ' '

ACE0 ZAPI V1

% ' '
% ' '

Display

SELECT : MOD. 00

ACE0 ZAPI V1

Press ENTER to commence the Restore operation

The Display will ask “ARE YOU SURE”.

Page - 52/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

ARE YOU SURE?

YES=ENTER NO=OUT

' % '
' ' '

Press ENTER for YES, or OUT for No

' % '
' ' '

' ' '
' % '

You can see the items that are being stored in the
chopper memory whilst the RESTORE routine is
happening

When finished, the Console shows :

Press OUT to return to the Opening Zapi Display

STORING

ACCELER. DELAY

MAIN MENU

RESTORE PARAM.

' ' '
' % '

4 NOTE: in reality the SAVE and RESTORE function requires the Windows PC-

Console.

11.3 Description of console “PROGRAM VACC” function

This enables adjustment of the minimum and maximum useful signal level, in
either direction. This function is unique when it is necessary to compensate for
asymmetry with the mechanical elements associated with the potentiometer,
especially relating to the minimum level.

The two graphs show the output voltage from a non-calibrated potentiometer with
respect to the mechanical “zero” of the control lever. MI and MA indicate the
point where the direction switches close. 0 represents the mechanical zero of the
rotation.
The Left Hand graph shows the relationship of the motor voltage without signal
acquisition being made. The Right Hand Graph shows the same relationship after
signal acquisition of the potentiometer.

This function looks for and remembers the minimum and maximum potentiometer
wiper voltage over the full mechanical range of the pedal. It enables
compensation for non symmetry of the mechanical system between directions.
The operation is performed by operating the pedal after entering the PROGRAM
VACC function.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 53/79

Flow Chart showing how to use the PROGRAM VACC function of the Digital
Console.

Opening Zapi Display

CA0Z2A ZP1.00

24V 200A 00000

Press ENTER to go into the General menu

The Display will show :

Press ROLL UP or ROLL DOWN button until
PROGRAM VACC the display

PARAMETER CHANGE

The Display will show :

Press ENTER to go into the PROGRAM VACC
function

The Display will show the minimum and maximum
values of potentiometer wiper output.

4.8 4.8

Both directions can be shown

Press ENTER to clear these values.
Display will show 0.0

Select Forward Direction, close any interlock
switches that may be in the system

MIN VACC MAX

0.0 - 0.0

' % '
' ' '

MAIN MENU

% ' '
% ' '

MAIN MENU

PROGRAM VACC

' % '
' ' '

VACC SETTING

' % '
' ' '

Slowly depress the accelerator pedal (or tiller
butterfly) to its maximum value. The new minimum
and maximum voltages will be displayed on the
Console plus an arrow indicating the direction.

Select the Reverse Direction and repeat Item 10

MIN VACC MAX

0.6 ↑ 4.4

When finished , press OUT

The Display will ask : ARE YOU SURE ?

YES=ENTER NO=OUT

Press ENTER for yes, or OUT for NO

When finished, the Console shows :

Press OUT to return to the Opening Zapi Display

' ' '
' % '

ARE YOU SURE

' % '
' % '

MAIN MENU

PROGRAM VACC

' ' '
' % '

Page - 54/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

11.4 Description of the throttle regulation

This regulation applies a not linear relationship between the position of the
accelerator and the speed of the truck. The main goal is to increase the
resolution for the speed modulation when the truck is slowly moving.
Three adjustments are used for the throttle regulation:

1) THROTTLE 0 ZONE

2) THROTTLE X POINT

3) THROTTLE Y POINT

THROTTLE 0 ZONE: the speed of the truck remains at frequency creep
meanwhile the voltage from the accelerator potentiometer is lower than this
percentage of the MAX VACC setting. This adjustment define the width of a dead
zone close to the neutral position.

THROTTLE X POINT & THROTTLE Y POINT: the speed of the truck grows up
with a fixed slope (linear relationship) from the THROTTLE 0 ZONE up to
THROTTLE X POINT. This slope is defined by the matching between the X point
percentage of the MAX VACC setting with the Y point percentage of the full truck
speed.
From the X point up to the MAX VACC point, the slope of the relationship
between the truck speed and the accelerator position is different (see figure
below) to match the full speed in the truck with the MAX VACC voltage in the
accelerator position.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 55/79

11.5 Description of the battery charge detection setting

The Battery Charge detection uses two setting that specify the Full Charge
Voltage Level (100%) and the Discharge Voltage Level (10%). These two
settings are the Bat.Max.Adj and the Bat.Min.Adj. It is possible to adapt the
Battery Charge Detection to your specific battery, by changing the above two
settings (e.g. if the Battery Discharged Detection occurs when the battery is not
totally discharged, it is necessary to reduce the Bat.Min.Adj setting as indicated
in the figure below).

48V NOMINAL BATTERY VOLTAGE

24V NOMINAL BATTERY VOLTAGE

Page - 56/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

The Battery Charge detection follows this algorithm:

1) Battery voltages is read when the Battery current is zero, that is when the
output power stage is not driven.

2) Vbatt is the mean of the least samples measured by the microcontroller
converter (the samples are took on key input).

3) Vbatt is compared with a threshold value (function of the actual charge
percentage) in a table and with comparison is found a new charge
percentage.

4) Thresholds value can be changed with parameters Bat. Max. Adj. and Bat.
Min. Adj.

5) After key on battery charge can be only increased if the battery charge
computed after key on is greater than the last value stored in Eeprom the
battery charge value is updated otherwise the Battery charge is not updated.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 57/79

12 ACE0 / COMBI AC0 ALARMS LIST

The ALARMS logbook in the MAIN MENU’ records the alarms of the controller. It
has a FIFO (First Input First Output) structure that means the oldest alarm is lost
when the database is full and a new alarm occurs. The logbook is composed of
five locations getting possible to stack five different type of alarms with the
following information:

1) The alarm code

2) The times that each alarm occurs consecutively

3) The Hour Meter value when the first event of every alarm occurred

4) And the inverter temperature when the first event of every alarm occurred.
This function permits a deeper diagnosis of problems as the recent history can be
revised.

4 NOTE: if the same alarm is continuously happening, the controller does not use

new memory of the logbook, but only updates the last memory cell increasing the
related counter (point 2) of previous list). Nevertheless, the hourmeter indicated
in this memory refers to the first time the alarm occurred. In this way, comparing
this hourmeter with the controller hourmeter, it is possible to determine:

- When this alarm occurred the first time.

- How many hours are elapsed from the first occurrence to now.

- How many times it has occurred in said period.

12.1 Faults diagnostic system

The fault diagnostic system of ACE0/ COMBI AC0 controller is divided into 2
main groups of faults:

ALARMS:

WARNINGS:

these are the faults which open the power section, which means

the power bridge is opened and, when possible, the LC is opened
and EB is applied.
These are faults related to:

- failures in the motor/controller that the power system is not
anymore able to drive the truck

- safety related failures

these are faults which do not stop the truck or stop it by a

controlled regen braking. In other words, the controller is working
well, but it has detected conditions to reduce the performances or
to stop the truck without opening the power devices.
These warnings are related to:

- wrong operator sequences

- conditions which require performance reduction (like high
temperatures, ….)

Page - 58/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

12.2 Alarms overview

pp

pp

pp

-

pp

A

-

pp

pp

pp

pp

y

pp

g)

pp

-

pp

pp

pp

Error Code Description Effect

Capacitor
charge - MDI
CAN 60

Vmn low - MDI
CAN 72

Vmn high ­MDI CAN 31

Power mos
shorted - MDI
CAN 89

Coil shorted ­MDI CAN 76

Driver shorted
MDI CAN 74

Contactor
Driver - MDI
CAN 75
Contactor
Open - MDI
CAN 77
Contactor
closed - MDI
CAN 75

ux driv. Shrt.

MDI CAN 40

Aux driver
open - MDI
CAN 42
Pos. EB
shorted - MDI
CAN 86

Logic Fail. #1 ­MDI CAN 54

Logic Fail. #2 ­MDI CAN 55

Logic fail. #3 ­MDI CAN 17

Stby i high ­MDI CAN 53

Wrong Set
Battery - MDI
CAN 41
Analog input ­MDI CAN 96

Encoder Error
MDI CAN 82

Tiller error ­MDI CAN 77

Watchdog ­MDI CAN 08

Power capacitors voltage does not increase Valve, pump, traction

Motor output voltage lower than expected Valve, pump, traction

Motor output voltage higher than expected Valve, pump, traction

Short circuit on the power mosfets Valve, pump, traction

Shortcircuit on LC or EB coil Valve, pump, traction

Driver of LC coil is shorted, so it is not able to open
the LC, or LC coil is disconnected

Driver of LC coil is damaged (not able to close) Valve, pump, traction

The LC coil has been driven but LC does not close Valve, pump, traction

LC contact is stuck Valve, pump, traction

When the mos of EB is shorted Valve, pump, traction

Driver of EB coil is damaged (not able to close) Valve, pump, traction

Output of built in Smart Driver, which supplies Eb coil
positive, is high (= +batt) when the tiller switch is
opened.

Overvoltage/Undervoltage condition has been
detected

Motor voltage feedback circuits are damaged Valve, pump, traction

Failure in the high current HW protection circuit valve, pump, traction

In stby condition (no current applied to the traction
motor) the current feedbacks are aout of permitted

range

stb
The battery voltage is too low or too high (< 0,8 Vbatt
OR > 1,2 Vbatt)

Problem on the A/D conversion of uC Valve, pump, traction

Problem on the encoder Valve, pump, traction

Input mismatch between hard&soft switch input and
tiller input

One of two (or both) Watchdog circuit outputs
becomes high due to an HW or SW problem

stopped, Lc opened, Eb
applied

stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb
applied

stopped, Lc opened, Eb

lied

a
Valve, pump, traction
stopped, Lc opened, Eb
a

lied

stopped, Lc opened, Eb
applied

stopped, Lc opened, Eb
applied

stopped, Lc opened, Eb
applied

stopped, Lc opened, Eb
a

lied

stopped, Lc opened, Eb
applied
Valve, pump, traction
stopped, Lc opened, Eb
applied

Valve, pump, traction
stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb

lied

a
Valve, pump, traction
stopped, Lc opened, Eb
applied
Valve, pump, traction
stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb

lied

a

stopped, Lc opened, Eb
a

lied
Valve, pump, traction
stopped, Lc opened, Eb

lied

a
Valve, pump, traction
stopped, Lc opened, Eb

lied

a

Machine status

when the test is

done

start-up Valve or pump or

start-up, traction Valve or pump or

start-up, traction Valve or pump or

start-up Valve or pump or

stby, traction Valve or pump or

start-up Valve or pump or

stby, traction Valve or pump or

stby, traction Valve or pump or

start-up Valve or pump or

start-up,stby,marcia Valve or pump or

stby, traction Valve or pump or

start-up Valve or pump or

start-up Valve or pump or

stby, immediately
after Lc closing

start-up, stby Valve or pump or

start-up, stby Valve or pump or

start-up, stand-by
(only immediately
after Lc closin
traction Valve or pump or

traction Valve or pump or

start-up, stby,
traction

start-up, stby,
traction

Restart

procedure

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

traction request

Valve or pump or
traction request

traction request

traction request

Valve or pump or
traction request

traction request

traction request

Valve or pump or
traction request

Key re-cycle

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 59/79

Error code Description Eff e ct

-

pp

q

-

pp

q

-

-

Machine status

when the test is

done

Restart

procedure

Smart driver
KO - MDI
CAN 68

Key-off
shorted ­MDI CAN 76

Evp1 not ok
MDI CAN 48

Evp2 not ok
MDI CAN 47

Pump Vmn
Low - MDI
CAN 28
Pump Vmn
High - MDI
CAN 29
Wrong Zero
MDI CAN
code alarm
53
Evp1 coil
open - MDI
CAN 50

Evp2 coil
open - MDI
CAN 51

Aux Batt.
Short - MDI
CAN code
alarm 74

Emergency
MDI CAN
code alarm
80

Flash
Checksum ­MDI CAN 08

Smart driver is open, not able to provide EB
positive

Key-off signal is low at Key-on

Evp driver is failed shorted (always ON)
mismatch between the valve set-point and
its feedback
Evp2 driver is failed shorted (always ON)
mismatch between the valve set-point and
its feedback

Pump motor output is too low, with respect
to pwm applied

Pump motor output is too high, with respect
to pwm applied

The outputs of the amplifiers (used to
measure the motor voltage) are cheked this
alarm occurs when voltage signals >3V or
<2V at the init
The Evp1 coil is not connected between
Paux and NEVP1 output, and the parameter
EVP TYPE in the set-option menu is set
Analog or Digital

The Evp2 coil is not connected between
Paux and NEVP2 output, and the parameter
EVP TYPE in the set-option menu is set
Analog or Digital

When the positive of the AUX OUTPUT is
driven by the tiller, the positive is high and
the tiller is released.

The PAUX connector (A3) is not connected
to the battery or the voltage is different.

The software is corrupted or the flash on the
inverter is damaged.

valve, pump, traction
stopped, Lc opened

valve, pump, traction
stopped, Lc opened

valve, pump, traction
stopped, Lc opened,

lied

Eb a
valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied
valve, pump, traction
stopped, Lc opened,

lied

Eb a
valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied

valve, pump, traction
stopped, Lc opened,
Eb applied

start-up Key re-cycle

start-up Key re-cycle

start-up, stby valve or pump

or traction

uest

re

start-up, stby valve or pump

or traction
request

start-up, stby,
during pump
function
during pump
function

init valve or pump

start-up, stby,
traction

start-up, stby,
traction

start-up, stby

continuous

continuous

valve or pump
or traction
request
valve or pump
or traction

uest

re

or traction
request

valve or pump
or traction
request

valve or pump
or traction
request

Current
Sens. KO ­MDI CAN 26

Phase KO ­MDI CAN 27

The current sensor is damaged. valve, pump, traction

stopped, Lc opened,
Eb applied

One of the motor phases is open valve, pump, traction

stopped, Lc opened,
Eb applied

continuous

continuous

Page - 60/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

12.3 Analysis and troubleshooting of microcontroller alarms

To Enter the MAIN MENU’ push the Enter button at the Home Page of the hand
set display and Roll for the ALARMS item. Here is the ALARMS list:

1) “CAPACITOR CHARGE”
Follows the charging capacitor system:

When the key is switched ON, the inverter tries to charge the power
capacitors through a power resistance, and check if the capacitor are
charged within a timeout. If they do not charge, an alarm is signalled; the
main contactor is not closed.
Troubleshooting:

A) There is an external load in parallel to capacitor bank, which sinks current

from the controller capacitors precharging circuit, thus preventing the
caps from charging. Check if a lamp or a dc/dc converter or a auxiliary
load is placed in // to capacitor bank.

B) The charging resistance is opened; insert a power resistance across line

contactor power terminals; if the alarm disappears, it means the controller

internal charging resistance is damaged.
C) The charging circuit has a failure, inside the controller.
D) There is a problem in the controller power section.

2) “VMN LOW”
Cause 1:
Before switching the LC on, the software checks the power bridge: it turns on
alternatingly the High side Power Mosfets and expects the phases voltage to
increase toward the rail capacitor value. If the phases voltage does not
increase, this alarm occurs.
Cause 2:
Motor running test. When the motor is running, power bridge is ON, the motor
voltage feedback is tested; if it is lower than commanded value, fault status is
entered.
Troubleshooting:

A) If the problem occurs at start up (the LC does not close at all), check:

start-up test.

- Motor internal connections (ohmic continuity)

- Motor power cables connections

- Motor leakage to truck frame

- If the motor connections are OK, the problem is inside the controller

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 61/79

B) If the alarm occurs during motor running, check:

- Motor connections

- If motor phases 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.

3) “VMN HIGH”
Cause 1:
Before switching the LC on, the software checks the power bridge: it turns on
alternatingly the Low side Power Mosfets and expects the phases voltage to
decrease down to -BATT. If the phases voltage do not decrease, this alarm
occurs.
Cause 2:
This alarm may occur also when the start up diagnosis is overcome, and so
the LC is closed. In this condition, the phases’ voltages are expected to be
lower than 1/2 Vbatt. If it is higher than that value, fault status is entered.
Troubleshooting:

A) If the problem occurs at start up (the LC does not close at all), check:

- Motor internal connections (ohmic continuity)

- 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 closed and then opens

back again), check:

- Motor connections

- If motor phases windings/cables have leakages towards truck frame

- If no problem are found on the motors, the problem is inside the
controller

4) “POWER MOS SHORTED”
Cause:

Before switching the LC on, the software checks the power bridge: it
turns on alternatingly the Low side and High side Power Mosfets and expects
the phases voltage to decrease down to –BATT (increase up to +Batt). If the
phases voltage do not follow the comands, this alarm occurs.
Troubleshooting:
This type of fault is not related to external components; replace the controller.

5) “COIL SHORTED”
Cause:
This alarm occurs when there is a short circuit of one of the coils connected
to outputs of the Combiac0 (LC coil or EB coil). After the overload condition
has been removed, the alarm exits automatically by releasing and then
enabling a travel demand.
Troubleshooting:
A) The typical root cause for this error code to be displayed is in the harness

or in the load coil. So the very first check to carry out concerns
connections between controller outputs and loads.

B) In case no failures/problems have been found externally, the problem is

in the controller, which has to be replaced.

6) “DRIVER SHORTED”
Cause:
The driver of the main contactor coil is shorted or the coil is disconnected.
Troubleshooting:
A) Check if there is a short or a low impedance pull-down between NMCC

Page - 62/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

CNA#12 and –BATT.
B) The driver circuit is damaged in the controller, which has to be replaced.
C) The wires to the LC coil are interrupted or not connected, so check the

coil related harness.

7) “CONTACTOR DRIVER”
Cause:
The LC coil driver is not able to drive the load. The device itself or its driving
circuit is damaged.
Troubleshooting:
This type of fault is not related to external components; replace the controller.

8) “CONTACTOR OPEN”
Cause:
The main contactor coil has been driven by the controller, but the contactor
does not close.
Troubleshooting:
It could be also a problem of the contact in the LC that is not working (does
not pull-in), try replacing the LC.

9) “CONTACTOR CLOSED”
Cause:
Before driving the LC coil, the controller checks if the contactor is stuck. The
controller drives the bridge for some tens milliseconds, trying to discharge the
capacitors bank. If they don’t discharge the fault condition is entered.
Troubleshooting:
It is suggested to verify the power contacts of LC; to replace the LC is
necessary.

10) “AUX DRIVER SHORTED”
Cause:
The driver of the electromechanical brake coil is shorted.
Troubleshooting:
A) Check if there is a short or a low impedance pull-down between NEB

CNA#4 and –BATT.

B) The driver circuit is damaged in the controller, which has to be replaced.

11) “AUX DRIVER OPEN”
Cause:
The driver of the electromechanical brake coil is not able to drive the load.
Troubleshooting:
Replace the controller.

12) “POS EB SHORTED”
Cause:
The output of the built in Smart Driver, which supplies the positive to the
Electromechanical brake coil is high when the Tiller and the H&S switch are
open.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if a positive is

connected to the Smart driver output CNA#2.

B) If, even disconnecting the wire from the connector pin, the output stays at

high value, the problem is inside the controller and the Smart Driver is
probably shorted.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 63/79

13) “LOGIC FAILURE #1”
This fault is displayed when the controller detects an overvoltage or
undervoltage condition. Overvoltage threshold is 35V, undervoltage threshold
is 9,5V in the 24V controller. In 48V controller overvoltage threshold is 65V,
undervoltage threshold is 9,5V.
Troubleshooting

of fault displayed at startup or in standby; in these cases it is
very likely the fault is due to an undervoltage, so it is suggested to check:
A) Key input signal down-going pulses (below undervoltage threshold) due

to external loads, like DC/DC converters starting-up, relais or contactor
switching, solenoids energizing / deenergizing.

B) If no voltage transient is detected on the supply line and the alarm is

present every time the key is switched ON, the failure is probably in the
controller hardware, so it is necessary to replace the controller.

Troubleshooting

of fault displayed during motor driving; in this case it can be
an undervoltage or a overvoltage condition.
A) If the alarm happens during traction acceleration or driving hydraulic

functions, it is very likely it is an undervoltage condition; check battery
charge condition, power cable connection.

B) If the alarm happens during release braking, it is very likely it is due to

overvoltage condition; check line contactor contact, battery power cable
connection.

14) “LOGIC FAILURE #2”
Cause:
Fault in the hardware section of the logic board which manages the phase’s
voltage feedback.
Troubleshooting:
This type of fault is not related to external components, so when it happens it
is necessary to replace the Controller.

15) “LOGIC FAILURE #3”
Cause:
Hardware problem in the logic card circuit for high current (overload)
protection.
Troubleshooting:
This type of fault is not related to external components, so, when it is present
it is necessary to replace the controller.

16) “STBY I HIGH”
Cause:
The current transducer or the current feedback circuit is damaged in the
controller.
Troubleshooting:
This type of fault is not related to external components so, when it is present,
it is necessary to replace the controller.

17) “WRONG SET BATTERY”
Cause:
At start-up, the controller checks the battery voltage and verify it is within a
window around the nominal value.
Troubleshooting:
A) Check that the controller SET BATTERY parameter value matches the

battery nominal voltage.

B) Check that the TESTER MENU / BATTERY VOLTAGE parameter shows

Page - 64/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

same value as the battery voltage measured with a voltmeter. If it is does
not match, then do a “ADJUST BATTERY” function.

C) Replace the battery.

18) “ANALOG INPUT”
Cause:
This alarm occurs when the A/D conversion of the analog inputs gives frozen
value, on all of the converted signals, for more than 400msec. The goal of
this diagnosis is to detect a failure of the A/D converter or a problem in the
code flow that omits the refreshing of the analog signal conversion.
Troubleshooting:
If the problem occurs permanently it is necessary to substitute the controller.

19) “ENCODER ERROR”
Cause:
This fault is signalled in following conditions: the frequency supplied to the
motor is higher than 40 Hz and the signal feedback from the encoder has a
jump higher than 40 Hz in few tens mSec. This condition is related to a
malfunctioning of the encoder.
Troubleshooting:
A) Check both the electric and the mechanical encoder functionality, the

wires crimping.

B) Check the encoder mechanical installation, if the encoder slips inside its

compartment raising this alarm condition.

C) Also the electromagnetic noise on the sensor bearing can be a cause for

the alarm. In these cases try to replace the encoder.

D) If the problem is still present after replacing the encoder, the failure is in

the controller.

20) “TILLER ERROR”
Cause:
Mismatch between the H&S input and the tiller input.
Troubleshooting:
Check the harness related to CAN#1 and CAN#29 with a voltmeter. If the
state of these inputs is right, then it could be a problem inside the controller,
which has to be changed.

21) “WATCHDOG”
Cause:
This is a safety related test. It is a self diagnosis test within the logic. The
watch dog circuit is composed by two monostable multivibrators so there is a
double check of software execution.
Troubleshooting:
This alarm could be caused by an hardware failure in one of two (or both)
multivibrator or due to a software execution problem. For both cases it is an
internal fault of the controller which must be replaced.

22) “SMART DRIVER KO”
Cause:
The built in smart driver is open, not able to provide the electro mechanic
brake positive.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if the Smart driver

output CNA#2 is shorted to –Batt.

B) If, even disconnecting the wire from the connector pin, the output stays at

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 65/79

low value, the problem is inside the controller and the Smart Driver is
probably damaged.

23) “KEYOFF SHORTED”
Cause:
This fault is displayed when the controller detects a low logic level of Key-Off
signal during Start-Up diagnosis.
Troubleshooting:
It is very likely the fault is due to an under voltage, so it is suggested to
check:
A) Key input signal down-going pulses (below under voltage threshold) due

to external loads, like DC/DC converters starting-up, relays or contactor
switching, solenoids energizing / de-energizing.

B) Check the connection of power cables to the battery terminal, positive

and negative, to MC and to controller +Batt and –Batt, which must be
screwed with a torque comprised in the range 5,6Nm÷8,4Nm.

C) If no voltage transient is detected on the supply line and the alarm is

present every time the key is switched ON, the failure is probably in the
controller hardware, so it is necessary to replace the logic board.

24) “EVP1 NOT OK”
Cause:
A) The EVP driver is shorted.
B) The microcontroller detects a mismatch between the valve set-point and

the diver voltage measured on the LOWER EVP1 output.
Troubleshooting:
Check if there is a short or a low impedance between the negative of the coil
and -BATT. Otherwise the driver circuit is damaged and the controller must
be replaced.

25) “EVP2 NOT OK”
Cause:
A) The EVP2 driver is shorted.
B) The microcontroller detects a mismatch between the valve set-point and

the diver voltage measured on the EVP2 output.
Troubleshooting:
Check if there is a short or a low impedance between the negative of the coil
and –BATT. Otherwise the driver circuit is damaged and the controller must
be replaced.

26) “PUMP VMN LOW”
Cause:
The pump motor output is lower than expected, considering the pwm applied.
Troubleshooting:
A) If the problem occurs at start up (the LC does not close at all), check:

- Motor internal connections (ohmic continuity)

- 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 closed and then opens

back again), check:

- Motor 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:

Page - 66/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

- Motor 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.

27) “PUMP VMN HIGH”
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:
It is suggested to check:
A) Motor connections
B) If motor windings/cables have leakages towards truck frame
C) If no problem are found on the motors, the problem is inside the

controller

28) “WRONG ZERO”
Cause:
The outputs of the amplifiers (used to measure the traction motor voltage)
are checked to be included into a range . This alarm occurs when the voltage
signals >3V or <2V at the init.
Troubleshooting:
This type of fault is not related to external components; replace the controller.

29) ”EVP1 COIL OPEN”
Cause:
This fault appears when the LOWER EVP1 output is used (parameter “EVP
TYPE” in “SET OPTION” menu is set ANALOG or DIGITAL) but no load is
connected between the output and PAUX positive.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if EVP1 coil is

connected to the right connector pin and if it is not interrupted.

B) If, even connecting the coil to the right pin or replacing it, the alarm is still

present than the problem is inside the controller logic board, replace it.

30) ”EVP2 COIL OPEN”
Cause:
This fault appears when the EVP2 output is used (parameter “EVP2 TYPE” in
“SET OPTION” menu is set ANALOG or DIGITAL) but no load is connected
between the output and PAUX positive.
Troubleshooting:
A) It is suggested to check the harness, in order to verify if EVP2 coil is

connected to the right connector pin and if it is not interrupted.

B) If, even connecting the coil to the right pin or replacing it, the alarm is still

present than the problem is inside the controller logic board, replace it.

31) “AUX BATT. SHORT”
Cause:
A) The coil on the aux output is not correctly connected.
B) The smartdriver inside the controller is damaged.

Troubleshooting:

- It is suggested to check that the coil is correctly connected between A2

and A4.

- If no problem is found on the coil, the problem is inside the controller.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 67/79

32) “EMERGENCY”
Cause:
The voltage on A3 is different than +Vbatt.

Troubleshooting:

- If A3 is correctly connected to +Vbatt.

- If the fuse on A3 is not damaged.

33) “FLASH CHECKSUM”
Cause:
The software was not correctly written into the flash memory or the flash
memory is damaged.
Troubleshooting:
This type of fault is not related to external components, replace the controller.

34) “CURRENT SENS. KO”
Cause:
One of the current sensor, used to measure the value of the current on the
motor phases, is damaged.
Troubleshooting:
This type of fault is not related to external components, replace the controller.

Page - 68/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

12.4 Warnings overview

-

-

Error code Description Effect

Slip profile ­MDI CAN 99

Forward+back
ward - MDI
CAN 80

Incorrect start
MDI CAN 79

Vacc not ok ­MDI CAN 78

Error on the parameters of the slip
profile setting.

The travel or inching demands are
active in both directions at the same
time

Incorrect starting sequence Traction is stopped start-up, stand-by,

The acceleretor value is higher than
the minimum value recorded, and the
direction/enable switches are opened.

Machine status

when the test is

done

Traction is stopped start-up, stand-by,

traction

Traction is stopped start-up, stand-by,

traction

traction

Traction is stopped start-up, stand-by,

traction

Restart

procedure

Traction
request

Traction
request

Traction
request

Traction
request

Th. Protection
MDI CAN 62

Battery low ­MDI CAN 65

Eeprom ko ­MDI CAN 71
Motor
temperature ­MDI CAN 65

Thermic sens
ko - MDI CAN
61
Check up
needed

Data
acquisition

Pedal wire ko
MDI CAN 86

Tiller open ­MDI CAN 51

The controller has reached the
thermal cutback temperature 85°C

Battery is <= 10% when the
parameter BATTERY CHECK is set
>0

Error is detected in eeprom or in
eeprom management
Traction motor temperature sensor is
opened (if digital) or has overtaken
the threshold of 150°C (if analog)

The output of the controller thermal
sensor is out of range.

Maintenance time is reached

Maximum current adjustment
procedure is in progress (NOTE: this
procedure has to be done only by
Zapi test department)
Accelerator poti negative (Npot)
voltage is out of range (less than 0,3V
or >2V)
The truck is in stby with tiller switch
opened for more than 30s

Traction controller
reduces the maximum
current linearly from
Imax (85°C) down to
0A (105°C)

The maximum current
is reduced to half and
speed is reduced (if
CHECK OPTION = 1)
Controller works using
Deafult parameters
The maximum current
is reduced to half and
speed is reduced

The maximum current
is reduced to half and
speed is reduced

Traction is stopped stand-by Traction

Traction is stopped start-up, stand-by,

LC opens standby Valve or pump

continuous

continuous

continuous

continuous

continuous

traction

request

Traction
request

or traction
request

Current gain ­MDI CAN 92

Waiting for
node - MDI
CAN 68

Deadman
absent - MDI
CAN 98

The Maximum current gain
parameters are the default values,
which means the maximum current
adjustment procedure has not been
carried out yet
A Canbus network node is in alarm
condition. uC is waiting for it to
resolve its error condition.

With the parameter "Positive EB" at
level 2 in the "HW setting" menu and
"Deadman" input open the alarm
appears

Controller works, but
with low maximum
current

LC opens standby Valve or pump

start-up, stanby

continuous

or traction
request

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 69/79

Machine status

Error code Description Effect

Coil shor. Ev. - MDI
CAN 76

EV1/5 driver shorted

- 74
EV2 driver shorted -

MDI CAN 74
EV3 driver shorted ­MDI CAN 74

EV4 driver shorted ­MDI CAN 74

Evp1 not ok - MDI
CAN 48

Evp2 not ok - MDI
CAN 47

Pump I NO zero ­MDI CAN 56

Pump I=0 ever ­MDI CAN 52

lift+lower - 49 lift+lower request Pump motor stopped continuous hydraulic request

Cont. Drv. Ev1 - MDI
CAN 75

Cont. Drv. Ev2 - MDI
CAN 75
Cont. Drv. Ev3 - MDI
CAN 75

Cont. Drv. Ev4 - MDI
CAN 75
Cont. Drv. Ev5 - MDI
CAN 75

Pump Vacc not OK ­MDI CAN 89

Sens. Mot. Temp.
KO - MDI CAN 67

BACKING INPUT -

MDI CAN 78

Shortcircuit on On/off valves coil On/off valves stopped start-up, stby,

EV1 or EV2 on/off valve drivers
shorted (always ON)

EV2 on/off valve driver shorted
(always ON)
EV3 on/off valve driver shorted
(always ON)

EV4 on/off valve driver shorted
(always ON)

Evp driver open (not able to close,
so not able to drive the valve)

Evp2 driver open (not able to close,
so not able to drive the valve)

Pump chopper current sensor
feedback is out of permitted stby
range
Pump current feedback is always
0A even when pump motor is
running

Driver of Ev1 is open, not able to
close

Driver of Ev2 is open, not able to
close
Driver of Ev3 is open, not able to
close

Driver of Ev4 is open, not able to
close
Driver of Ev5 is open, not able to
close

The pump accelerator value is
higher than the minimum value
recorded, and the lift/lower
switches are open

The motor temperature sensor is
damaged

An inching request is performed
and the tiller input is active, or FW
or REV input is active

On/off valves stopped start-up, stby valve on/off request

On/off valves stopped start-up, stby valve on/off request

On/off valves stopped start-up, stby valve on/off request

On/off valves stopped start-up, stby valve on/off request

Evp stopped during Evp

Evp stopped during Evp

Pump motor stopped start-up, stby pump request

Pump motor stopped pump function pump request

Ev1 stopped during Ev1

Ev2 stopped during Ev2

Ev3 stopped during Ev3

Ev4 stopped during Ev4

Ev5 stopped during Ev5

Pump stopped Continuous Pump request

Performance highly
reduced

Traction is stopped

when the test is

done

during valve
function

function

function

function

function

function

function

function

Continuous Key-on recycle

start-up, stand­by, traction

Restart

procedure

valve on/off request

valve evp request

valve evp request

valve Ev1 request

valve Ev2 request

valve Ev3 request

valve Ev4 request

valve Ev5 request

traction request

Page - 70/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

12.5 Analysis and troubleshooting of warnings

1) “SLIP PROFILE”
Cause:
There is an error on the choice of the parameters of the slip profile.
Troubleshooting:
Check in the hardware setting menu the value of those parameters.

2) “FORW+BACK”
Cause:
This alarm occurs when both the travel demands (Fwd and Bwd) or
BACKING FOR and BACKING REV are active at the same time.
Troubleshooting:
Check the wiring of the Fwd and Rev travel demand inputs and BACKING
FOR and BACKING REV inputs (use the readings in the TESTER to facilitate
the troubleshooting). Check the microswitches for failures.
A failure in the logic is possible too. So, when you have verified the travel
demand and Backing switches are fine working and the wiring is right, it is
necessary to replace the controller.

3) “INCORRECT START”
Cause:
This is a warning for an incorrect starting sequence.
Troubleshooting:
The possible reasons for this alarm are (use the readings in the TESTER to
facilitate the troubleshooting):
A) A travel demand active at key on
B) Presence man sensor active at key on

Check the wirings. Check the micro-switches. It could be also an error
sequence made by the operator. A failure in the logic is possible too; so
when all of the above conditions were checked and nothing was found,
replace the controller.

4) “VACC NOT OK”
Cause:
The test is made at key-on and after 20sec that both the travel demands
have been turned off. This alarm occurs if the ACCELERATOR reading in the
TESTER menu’ is 1,0V higher than PROGRAM VACC min acquisition when
the accelerator is released.
Troubleshooting:
Check the mechanical calibration and the functionality of the potentiometer.

5) “HIGH TEMPERATURE”
Cause:
This alarm occurs when the temperature of the base plate is higher than 85°.
Then the maximum current decreases proportionally with the temperature
increases from 85° up to 105°. At 105° the Current is limited to 0 Amps.
Troubleshooting:
Improve the air cooling of the controller. If the alarm is signalled when the
controller is cold, the possible reasons are a thermal sensor failure or a
failure in the logic card. In this case, it is necessary to replace the controller.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 71/79

6) “BATTERY LOW”
Cause:
It occurs when the battery charge is calculated being less than or equal to
10% of the full charge and the BATTERY CHECK setting is other than 0
(refer to SET OPTION menu).
Troubleshooting:
Get the battery charged. If it doesn’t work, measure with a voltmeter the
battery voltage and compare it with the value in the BATTERY VOLTAGE
parameter. If they are different adjust the value of the ADJUST BATTERY
function.

7) “EEPROM KO”
Cause:
It’s due to a HW or SW defect of the non-volatile embedded memory
supporting the controller parameters. This alarm does not inhibit the machine
operations, but the truck will work with the default values.
Troubleshooting:
Try to execute a CLEAR EEPROM operation (refer to Console manual).
Switch the key off and on to check the result. If the alarm occurs
permanently, it is necessary to replace the controller. If the alarm disappears,
the previously stored parameters will have been replaced by the default
parameters.

8) “MOTOR TEMPERATURE”
Cause:
This warning occurs when the temperature sensor is opened (if digital) or has
overtaken the threshold of 150°C (if analog).
Troubleshooting:
Check the thermal sensor inside the motor (use the MOTOR
TEMPERATURE reading in the TESTER menu); check the sensor ohmic
value and the sensor wiring. If the sensor is OK, improve the air cooling of
the motor. If the warning is present when the motor is cool, then the problem
is inside the controller.

9) “THERMIC SENSOR KO”
Cause:
The output of the controller thermal sensor is out of range.
Troubleshooting:
This type of fault is not related to external components; replace the controller.

10) “CHECK UP NEEDED”
Cause:
This is just a warning to call for the time programmed maintenance.
Troubleshooting:
It is just enough to turn the CHECK UP DONE option to level ON after the
maintenance is executed.

11) “DATA ACQUISITION”
Cause:
Acquisition of the current gains.
Troubleshooting:
The alarm ends when the acquisition is done.

12) “PEDAL WIRE KO”
Cause:

Page - 72/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

The SW continuously checks for the connection of the two supply ends of the
potentiometer in the accelerator. The test consists of reading the voltage
drop on a sense diode, connected between NPOT (CNA#30) and GND and
cascaded with the potentiometer: if the potentiometer gets disconnected on
PPOT (CNA#25) or NPOT, no current flows in this sense diode and the
voltage on the NPOT connection collapses down.
When the NPOT voltage is less than 0.3V this alarm occurs. This alarm
occurs also when the NPOT voltage is higher than 2Vdc (to detect also the
condition of a broken sense diode).
Troubleshooting:
Check the voltage on NPOT and the potentiometer connections.

13) “TILLER OPEN”
Cause:
Warning: when the tiller is released, after a fixed period of time of standby
(30 seconds) the main contactor open.
Troubleshooting:
At the next travel request the warning disappear.

14) “CURRENT GAIN”
Cause:
The Maximum current gain parameters are at the default values, which
means the maximum current adjustment procedure has not been carried out
yet.
Troubleshooting:
Ask the assistance of a Zapi technician to do the correct adjustment
procedure of the current gain parameters.

15) “WAITING FOR NODE”
Cause:
The controller receives from the CAN the message that another controller in
the net is in fault condition; as a consequence the ACE0/ COMBIAC0
controller itself cannot enter an operative status, but has to WAIT for the
other controller coming out from the fault status.

16) “DEAD MAN ABSENT”
Cause:
This warning (presents only in trucks with “Dead Man” switch) appears when
the “Dead Man” switch is open.
Troubleshooting:
At the next travel request with dead man switch close the warning
disappears.

17) “CURRENT SENSOR LOW”
Cause:
The pump chopper current sensor feedback is too low (below 0.5V).
Troubleshooting:
This type of fault is not related to external components; replace the controller.

18) “VALVE COIL SHORTED”
Cause:
This alarm occurs when there is a short circuit on an on/off valve coil.
Troubleshooting:
A) If the fault is present at start up, it is very likely that the hw overcurrent

protection circuit is damaged, it is necessary to replace the controller.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 73/79

B) If the fault is present when the controller drives the outputs, the problem

is located in the harness and in the coils.

19) “EV1/5 DRIVER SHORTED”
Cause:
Electrovalve EV1 or EV2 driver is shorted.
Troubleshooting:
Check if there is a short or a low impedence between the negative of one of
those coils and –BATT. Otherwise the driver circuit is damaged and the
controller must be replaced.

20) “EV2 DRIVER SHORTED”
Cause:
Electrovalve EV2 driver is shorted.
Troubleshooting:
Check if there is a short or a low impedance between the negative of this coil
and –BATT. This warning occurs also if the external load is not present and
the parameter EV2 in the “Set Options” menu is set “PRESENT”, in this case
the warning disappears setting the EV2 parameter “ABSENT”. Otherwise the
driver circuit is damaged and the controller must be replaced.

21) “EV3 DRIVER SHORTED”
Cause:
Electrovalve EV3 driver is shorted.
Troubleshooting:
Check if there is a short or a low impedance between the negative of this coil
and –BATT. This warning occurs also if the external load is not present and
the parameter EV3 in the “Set Options” menu is set “PRESENT”, in this case
the warning disappears setting the EV3 parameter “ABSENT”. Otherwise the
driver circuit is damaged and the controller must be replaced.

22) “EV4 DRIVER SHORTED”
Cause:
Electrovalve EV4 driver is shorted.
Troubleshooting:
Check if there is a short or a low impedance between the negative of this coil
and –BATT. This warning occurs also if the external load is not present and
the parameter EV4 in the “Set Options” menu is set “PRESENT”, in this case
the warning disappears setting the EV4 parameter “ABSENT”. Otherwise the
driver circuit is damaged and the controller must be replaced.

23) “VALVE CONT DRIVER”
Cause:
One or more on/off valve drivers is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

24) “EVP DRIVER KO”
Cause:
The EVP valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

25) “EVP2 DRIVER KO”
Cause:

Page - 74/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

The EVP2 valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

26) “PUMP I NO ZERO”
Cause:
In standby condition (pump motor not driven), the feedback coming from the
current sensor in the pump chopper gives a value out of a permitted range,
because the pump current is not zero.
Troubleshooting:
This type of fault is not related to external components; replace the controller.

27) “PUMP I=0 EVER”
Cause:
This test is carried out when the pump motor is running, and it verifies that
the current feedback sensor is not constantly stuck to 0.
Troubleshooting:
A) Check the motor connection, that there is continuity. If the motor

connection is opened, the current cannot flow, so the test fails and the
error code is displayed.

B) If everything is ok for what it concerns the motor, the problem could be in

the current sensor or in the related circuit.

28) “RAM WARNING”
Cause:
Checksum of the ram failed.
Troubleshooting:
This fault is not related to external components.

29) “EEP WARNING”
Cause:
Eeprom checksum failed
Troubleshooting:
Try to execute a CLEAR EEPROM operation (refer to Console manual).
Switch the key off and on to check the result. If the alarm occurs
permanently, it is necessary to replace the controller. If the alarm disappears,
the previously stored parameters will have been replaced by the default
parameters.

30) “LIFT + LOWER”
Cause:
This alarm occurs when both forks movement requests(Lift + Lower) are
active at the same time.
Troubleshooting:
Check the wiring of the Lift and lower inputs (use the readings in the
TESTER to facilitate the troubleshooting). Check the microswitches for
failures.
A failure in the logic is possible too. So, when you have verified the travel
demand switches are fine working and the wiring is right, it is necessary to
replace the controller.

31) “CONT. DRV. EV1”
Cause:
The EV1 valve driver is not able to drive the load (cannot close).
Troubleshooting:

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 75/79

The device or its driving circuit is damaged, replace the controller.

32) “CONT. DRV. EV2”
Cause:
The EV2 valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

33) “CONT. DRV. EV3”
Cause:
The EV3 valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

34) “CONT. DRV. EV4”
Cause:
The EV4 valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

35) “CONT. DRV. EV5”
Cause:
The EV5 valve driver is not able to drive the load (cannot close).
Troubleshooting:
The device or its driving circuit is damaged, replace the controller.

36) “TH. PROTECTION”
Cause:
The controller detected a high temperature, and the performance of the
motor is limited.
Troubleshooting:
It is suggested to check the cause of the high temperature. Usually the
controller is not correctly installed or the fan doesn’t work.

37) “PUMP VACC NOT OK”
Cause:
The minimum of the lift potentiometer is not correctly set.
Troubleshooting:
It is suggested to repeat a “PROGRAM VACC” procedure.

38) “SENS. MOT. TEMP.”
Cause:
A) The motor temperature sensor is not correctly connected to A22.
B) The motor temperature sensor is damaged.
Troubleshooting:

- Check the correct connection of the motor temperature sensor.

- If the current sensor is correctly connected, replace it.

- If the problem persist, it is due to the controller.

39) “BACKING INPUT”
Cause:
A) An inching request is performed and the tiller input is active.
B) An inching request is performed and FW or REV input is active.
Troubleshooting:
Check the movement sequences that involve FW, REV, Tiller, BACKING

Page - 76/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

FOR and BACKING REV inputs.
Check the wiring of the BACKING FOR and BACKING REV inputs (use the
readings in the Tester to facilitate the troubleshooting). Check the
microswitches for failures.
A failure in the logic is possible too. So, if you have verified through the tester
that the BACKING FOR or/and BACKING REV doesn’t change when you
depress / release the correspondant switches, replace the controller.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 77/79

13 RECOMMENDED SPARE P ARTS

Part number Description

C12532

C29508

C29522

AMPSEAL CONNECTOR

35 pins Female

SW 180 24V

Single Pole Contactor

SW 180 48V

Single Pole Contactor

Page - 78/79 AF6ZP0AL - COMBIAC0 & ACE0 - User Manual

14 PERIODIC MAINTENANCE TO BE

REPEATED AT TIMES INDICATED

Check the wear and condition of the Contactors’ moving and fixed contacts.

Electrical Contacts should be checked every 3 months.

Check the Foot pedal or Tiller microswitch. Using a suitable test meter, confirm
that there is no electrical resistance between the contacts by measuring the volt
drop between the terminals. Switches should operate with a firm click sound.

Microswitches should be checked every 3 months.

Check the Battery cables, cables to the inverter, and cables to the motor. Ensure
the insulation is sound and the connections are tight.

Cables should be checked every 3 months.

Check the mechanical operation of the pedal or tiller. Are the return springs ok.
Do the potentiometers wind up to their full or programmed level.

Check every 3 months.

Check the mechanical operation of the Contactor(s). Moving contacts should be
free to move without restriction.

Check every 3 months.

Checks should be carried out by qualified personnel and any replacement parts
used should be original. Beware of NON ORIGINAL PARTS.
The installation of this electronic controller should be made according to the
diagrams included in this Manual. Any variations or special requirements should
be made after consulting a Zapi Agent. The supplier is not responsible for any
problem that arises from wiring methods that differ from information included in
this Manual.

During periodic checks, if a technician finds any situation that could cause
damage or compromise safety, the matter should be bought to the attention of a
Zapi Agent immediately. The Agent will then take the decision regarding
operational safety of the machine.

Remember that Battery Powered Machines feel no pain.

NEVER USE A VEHICLE WITH A FAULTY ELECTRONIC CONTROLLER.

U IMPORTANT NOTE ABOUT WASTE MANAGEMENT:

This controller has both mechanical parts and high-density electronic parts
(printed circuit boards and integrated circuits). If not properly handled
during waste processing, this material may become a relevant source of
pollution. The disposal and recycling of this controller has to follow the
local laws for these types of waste materials.
Zapi commits itself to update its technology in order to reduce the
presence of polluting substances in its product.

AF6ZP0AL - COMBIAC0 & ACE0 - User Manual Page - 79/79