SME AC-M1, Manual

Page: 37 / 62

6 Diagnostic and troubleshooting
6.1 Overview
Diagnostic information about anomalous working condition is provided by COMPACT
display or by PC (using EyePlus software utility).
This chapter explains how to manage any detected fault and how to return to a normal
working situation; suggestions to be applied in case of each possible alarm are listed in a
growing order, i.e. from the least to the most serious one.
If an alarm condition is detected by the main board, software control inhibits some lift truck
functions, to guarantee the operator's safety.
Anomalous working conditions are indicated by different alarm levels, classified as follows,
depending on their effects on the system:
●
Level 1 : the main breaker is opened and both pump and drive motors are stopped;
the buzzer and the red LED on the upper right corner of the COMPACT display
signal the presence of such alarm.
●
Level 2 : the pump and drive motors are stopped.
●
Level 3 : the drive motor speed is limited to 2000 rpm. Moreover, in presence of
such alarm, the first command given to the pump motor is inhibited 3 seconds after
its activation, together with all the pump motor functions (except the hydro steering
functions).
●
Level 4 : the drive and pump motors speed is limited to 800 rpm; the buzzer signals
the presence of such alarm.
●
Level 5 : the drive motors speed is limited to 800 rpm; over temperature alarms are
signalled by the buzzer activation.
●
Level 6 : the pump motor speed is limited to 800 rpm; the buzzer signals the
presence of such alarm.
●
Level 7 : no effects on the system performance.
When an alarm occurs, the system remains in alarm state until it is switched off.
However, some alarms are classified as “reversible warnings”, which means that they are
active while a specific wrongful condition is verified, but when this specific condition ends,
the reversible warning is cleared and the system is no longer in an alarm condition.
If two or more alarm conditions occur concurrently, only the most
serious one (i.e. the one with the lowest alarm level) is displayed by
EyePlus or the display.
PRELIMINARY VERSION 37