A.4.15 M.d.i. Indicator - Ransomes diabline Operation & Service Manual

A.4.15 M.D.I. indicator

This is an indicator, in the form of luminous warning lights and a liquid crystal display, situated on the dashboard.
The MDI indicator provides information on:
CODES DESIGNATION
AL02
AL10 to AL12 EEPROM KO
AL13 EEPROM KO
AL15 to AL19 LOGIC FAILURE #1
AL32 VMN NOT OK
AL49 I=0 EVER
AL53 STBY I HIGH
AL57 to AL58 HIGH / NO FIELD CURR
AL61
AL62 TH PROTECTION
AL65 MOTOR TEMPERATURE
AL66 BATTERY LOW
CONTACTOR DRIVER or COIL
AL75tot AL76
SHORTED
AL78 HANDBRAKE orVACC NOT OK
AL79 INCORRECTSTART
AL80 FORW+BACK
AL86 PEDALWIRE KO
SAFETY AND OPERATORS MANUAL
SIGNIFICANCE
Problem with the dialogue between the speed control and the MDI
Problem with the eeprom
Problem with the confi guration of the eprom
Automatic test carried out at start up that has a problem with the speed control level
Problem with the measure of the voltage between the speed control and the voltage relayed to the battery :
Erroneous motor connectionœ
Motor shorting to earth
Power unit fault
Automatic test during travel verifi es that the current would not be more than the minimum threshold
value(possibly related to AL53)
Automatic test check of current signal:
Defective current collector
Defect in retroactive circuit
Defect in the power logic
Anomaly in the current fi eld:
Anomaly in the current collector
Field cables not connected
Defect in the fi eld current unit
Temperature of speed control too high
The temperature of the speed control is greater than 77º and the current is reduced in proportion to this rise.
The speed control stops at 92º.
The temperature of the speed control is less than –10°C; the maximum current is reduced to 80%.
The speed control is at normal temperature (ambient), idem AL65
The motor temperature is greater than the intervention threshold of the sensor (the speed of the motor is
reduced)
If the alarm goes off motor cold:
Defect with sensor
Problem of connection of sensor
The battery is below 50% of the nominal value
Circuit defect in general contact control circuit:
The contact winding is short circuiting or not connected
The direction of travel is not selected or the hand brake is on, or one or more safety(ies) annexe(s) –special
option(s))- is/are activated
The following test gives confi rmation : keep the button "check MDI" down (page 22) and give a slight push on
the accelerator, if the vehicle moves forward one of the following is the likely cause
A wire in the potentiometer is brokenœ Defective potentiometer
Erroneous starting sequence :
Problem with the connection between the accelerator pedal and the corresponding entry into the speed
control
Wiring error
Forward and reverse demanded at the same time:
Problem with the connection between the accelerator pedal and the corresponding entry into the speed
control
Wiring error
Defect of the potentiometer and the accelerator pedal:
Wiring defect
Wire broken
RANSOMES DIABLINE
GB-23