trouble shooting in the electrical system trouble shooting on every lawn tractor,circuit on every...
TRANSCRIPT
Trouble shootingTrouble shootingIn theIn the
Electrical SystemElectrical System
TROUBLE SHOOTING
On every lawn tractor,On every lawn tractor, the safety circuitcircuit work in two ways:
These are?These are?
Starting circuitStarting circuit&&
Work safety circuitWork safety circuit
Lawn-tractors and Rider Models
Starting circuitStarting circuitBy preventing the engine from starting if all the safety requirements have not been
met
Work safety circuitWork safety circuitStopping the engine if even just one of the
safety requirements is lacking.
TROUBLE SHOOTING
Lawn-tractors and Rider Models
Ignition Switch ConfigurationIgnition Switch Configuration
PCB FEEDING ENGINE STARTING
The ignition works as a simple switch.Lights and „Engine Grounding“ are managed by PCB.
TROUBLE SHOOTING
Lawn-tractors and Rider Models
Ignition Switch ConfigurationIgnition Switch Configurationfor SD98/108 Modelsfor SD98/108 Models
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Lawn-tractors and Rider Models
There are electrical parts common to all PCB There are electrical parts common to all PCB on every lawn tractor.on every lawn tractor.
(not for (not for 63 63 andand 98/108 98/108 withwith GGP EnginesGGP Engines Model)Model)
These are?These are?Protectors
They breaks the circuit if there is a fault in the electrical system. It results in the stopping of the engine and:
an audible signal (for 102/122...) which can only be stopped by turning the key (OFF position).
the lamp‘s turning off (for 92 and 72).
TROUBLE SHOOTING
Lawn-tractors and Rider Models
on 98/108 Series NO signals, No lamps.
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Lawn-tractors and Rider Models
PCB (type)Self-resetting PROTECTION
Self-resetting protection ATTIVATION
Battery terminal crossed
PROTECTION
6327722354/0 (Elect. START)
27722357/0 (manual START) NO N/A NO
72 25722415/1 YESfailure of the LED to light
or switching off during work
YES
NJ92-NJ10225722430/1 (1 LED)25722431/0 (6 LED) YES ? YES
25722433/0 (GGPEngine) NO N/A YES82722429/0 (B&S/HONDA
Engine) YESNO visible or audible
SIGNALS YES
102-122
25722413/1 (6-7-8 LED)82722420/2 (No LCD Type A)
82722421/2 (LCD Type B)82722423/2 (LCD Type C)82722422/3 (LCD Type D)
YES
It is signalled by a beep, except in cases where the battery is missing, flat or
with the terminal crossed.
YES
2-4WD102-122
82722423/2 (LCD Type C)82722422/3 (LCD Type D) YES
It is signalled by a beep, except in cases where the battery is missing, flat or
with the terminal crossed.
YES
SD98-SD108
ELECTRONIC CARDS (PCB) INFO
MODEL
FEATURES (from 2010/2011)
TROUBLE SHOOTING
Lawn-tractors and Rider Models
PCB (type)Self-resetting PROTECTION
Self-resetting protection ATTIVATION
Battery terminal crossed
PROTECTION
6327722354/0 (Elect. START)
27722357/0 (manual START) NO N/A NO
72 25722415/1 YESfailure of the LED to light
or switching off during work
YES
NJ92-NJ10225722430/1 (1 LED)25722431/0 (6 LED) YES ? YES
25722433/0 (GGPEngine) NO N/A YES82722429/0 (B&S/HONDA
Engine) YESNO visible or audible
SIGNALS YES
102-122
25722413/1 (6-7-8 LED)82722420/2 (No LCD Type A)
82722421/2 (LCD Type B)82722423/2 (LCD Type C)82722422/3 (LCD Type D)
YES
It is signalled by a beep, except in cases where the battery is missing, flat or
with the terminal crossed.
YES
2-4WD102-122
82722423/2 (LCD Type C)82722422/3 (LCD Type D) YES
It is signalled by a beep, except in cases where the battery is missing, flat or
with the terminal crossed.
YES
SD98-SD108
ELECTRONIC CARDS (PCB) INFO
MODEL
FEATURES (from 2010/2011)
NOTA : l'intervento della protezione autoripristinante è associabile a TUTTE le casistiche dove c'è una sovratensione
NOTE : in general the attivation of the SELF RESETTING PROTECTION is caused by an OVERVOLTAGE on the circuit
· Battery terminal crossed
· Short circuit to earth (microswitches)
· Overvoltage from a malfunction in the regulator
· Sulphated battery
Activation of the protection
Trouble shooting within the starting circuitTrouble shooting within the starting circuit(not for (not for 6363 Model) Model)
Possible reasons :Possible reasons :
1.1. Check the battery (battery terminals corroded or with Check the battery (battery terminals corroded or with poor contact)poor contact)
2.2. Check the connectors and wiring of the microswitches Check the connectors and wiring of the microswitches (Short circuit to ground).(Short circuit to ground).
... in position «ON» or after a few seconds use:
TROUBLE SHOOTING
Lawn-tractors and Rider Models
The cause of the fault should be ascertained and dealt with to avoid re-activating the protection device.
Trouble shooting within the starting circuitTrouble shooting within the starting circuit(not for (not for 6363 Model) Model)
Possible reasons :Possible reasons :
1.1. Poor or missing ground contact on the charge regulator Poor or missing ground contact on the charge regulator or on the PCBor on the PCB
2.2. Overvoltage from a malfunction in the regulatorOvervoltage from a malfunction in the regulator
... after several minutes’ use:
3.3. Battery disconnected or faulty during useBattery disconnected or faulty during use
Activation of the protection
TROUBLE SHOOTING
Lawn-tractors and Rider Models
Starting CircuitStarting CircuitWhat must be given to start the tractor?What must be given to start the tractor?
(From a safety point of view)(From a safety point of view)
the transmission is in “neutral”;the transmission is in “neutral”;the blades are not engaged;the blades are not engaged;
andandthe operator is seated or the parking the operator is seated or the parking
brake is engaged.brake is engaged.TROUBLE SHOOTING
Lawn-tractors and Rider Models
On every lawn tractor On every lawn tractor when the operator is SEATED, the operator safety switch plunger must be fully depressed.
MICROSWITCH
TROUBLE SHOOTING
Lawn-tractors and Rider Models
MICROSWITCH
On every lawn tractor On every lawn tractor when the blades are NOT ENGAGED, the BLADES safety switch plunger must be fully
depressed.
Blade Engagement Lever
FOR ELECTROMAGNETIC CLUTCH MODEL, THERE IS A BUTTON (SWITCH) ON THE DASHBOARD
BLADES ARE NOT ENGAGED
TROUBLE SHOOTING
Lawn-tractors and Rider Models
MICROSWITCH
On every lawn tractor On every lawn tractor when the parking brake IS NOT ENGAGEDIS NOT ENGAGED, the BRAKE safety switch plunger must be fully depressed.
PARKING BRAKE IS NOT ENGAGED
TROUBLE SHOOTING
Lawn-tractors and Rider Models
On Hydrostatic Transmission On Hydrostatic Transmission when the transmission IS NOT IS NOT ENGAGEDENGAGED, the safety switch plunger must be fully depressed.
MICROSWITCH
TROUBLE SHOOTING
Lawn-tractors and Rider Models
At last, GEAR TRANSMISSION safety switch, for PEERLESS transmission (on starting configuration) must be depressed too
MICROSWITCH is positioned inside of the transmission
TROUBLE SHOOTING
Lawn-tractors and Rider Models
STARTER
ENGINE
BATTERY
SOLENOID
BATTERYBATTERY
IGNITION SWITCH
NC - 3
NO - 2C
START
BLADES SWITCH
NC - 3
NO - 2C
NC - 3
NO - 2C
NEUTRAL SWITCH
SEAT SWITCHBRAKE SWITCH
TROUBLE SHOOTING
Trouble shooting within the starting circuitTrouble shooting within the starting circuit
If the engine cranks but does not start, when If the engine cranks but does not start, when turning the ignition key to the start position, the turning the ignition key to the start position, the
electrical starting circuit is...?electrical starting circuit is...?
IntactIntact..
TROUBLE SHOOTING
Lawn-tractors and Rider Models
The dashboard (for The dashboard (for 102/122) or the pilot lamp (or the pilot lamp (for,92 and 72) ) remains offremains off when the ignition key is turned to when the ignition key is turned to
the the ONON position then the starting circuit is not working. position then the starting circuit is not working.What are the logical trouble shooting steps? What are the logical trouble shooting steps?
Trouble shooting within the starting circuitTrouble shooting within the starting circuit(not for (not for 6363 Model) Model)
1.1. Check and replace fuse 10 ACheck and replace fuse 10 A
2.2. Battery or card not earthed to frame... check (and put right) Battery or card not earthed to frame... check (and put right)
3.3. Check the battery (connection cables and battery’s condition)Check the battery (connection cables and battery’s condition)
TROUBLE SHOOTING
Lawn-tractors and Rider Models
The dashboard (for The dashboard (for 102/122) or the pilot lamp (for,or the pilot lamp (for,92 and 72) ) switches onswitches on when the ignition key is turned to the when the ignition key is turned to the STARTSTART position, but the starter does not turn or lacks position, but the starter does not turn or lacks
power.power.What are the logical trouble shooting steps? What are the logical trouble shooting steps?
Trouble shooting within the starting circuitTrouble shooting within the starting circuit
1.1. Check the battery charge.Check the battery charge.
2.2. Check (and put right) : badly earthed battery, or the starter relay or motor not Check (and put right) : badly earthed battery, or the starter relay or motor not earthedearthed
3.3. Check the starter relayCheck the starter relay
These trouble shooting steps + the ones with the key in the „ON“
position, are are OK for 63cm63cm
TROUBLE SHOOTING
Lawn-tractors and Rider Models
Work safety Work safety circuitcircuit
TROUBLE SHOOTING
Work safety CircuitWork safety Circuit
We can identify 3 „work situation“.We can identify 3 „work situation“.These are ...?These are ...?
1.1. When the Lawn-Tractor is cutting.When the Lawn-Tractor is cutting.
2 . When the Lawn-Tractor is moving (blade OFF).2 . When the Lawn-Tractor is moving (blade OFF).
3 . When the Engine is runing and Lawn-Tractor is standing 3 . When the Engine is runing and Lawn-Tractor is standing (blade OFF).(blade OFF).
TROUBLE SHOOTING
Lawn-tractors and Rider Models
Work safety CircuitWork safety Circuit
The operator is seatedThe operator is seated
What must be given that the engine continues to run What must be given that the engine continues to run when the Lawn-Tractor is cutting when the Lawn-Tractor is cutting ??
(From a safety point of view)(From a safety point of view)
The parking brake is not engaged.The parking brake is not engaged.
The grass-catcher or the stone-guard are fitted.The grass-catcher or the stone-guard are fitted.
TROUBLE SHOOTING
Lawn-tractors and Rider Models
On every lawn tractor (Side Discharge apart) On every lawn tractor (Side Discharge apart) when the grass-catcher or the stone-guard ARE FITTED, the safety switch plunger
must be fully depressed.
MICROSWITCH
TROUBLE SHOOTING
Lawn-tractors and Rider Models
NC - 3
NO - 2C
OPERATOR SWITCH
ENGINE
NC - 3
NO - 2C
BRAKE SWITCH
NC - 3
NO - 2C
NC - 3
NO - 2C
GRASS-CATCHER SWITCH
NC - 3
NO - 2C
NC - 3
NO - 2C
TROUBLE SHOOTING
Work safety CircuitWork safety Circuit
The operator is seatedThe operator is seated
What must be given that the engine continues to run What must be given that the engine continues to run when the Lawn-Tractor is movingwhen the Lawn-Tractor is moving ??
(From a safety point of view)(From a safety point of view)
The parking brake is not engaged.The parking brake is not engaged.
TROUBLE SHOOTING
Lawn-tractors and Rider Models
NC - 3
NO - 2C
OPERATOR SWITCH
ENGINE
NC - 3
NO - 2C
NC - 3
NO - 2C
BRAKE SWITCH
NC - 3
NO - 2C
TRANSMISSION ENGAGED
TROUBLE SHOOTING
Work safety CircuitWork safety Circuit
If the operator leaves his seat, the parking If the operator leaves his seat, the parking brake must be engagedbrake must be engaged
What must be given that the engine continues to run What must be given that the engine continues to run when the engine is runing and Lawn-Tractor is when the engine is runing and Lawn-Tractor is
standingstanding??(From a safety point of view)(From a safety point of view)
TROUBLE SHOOTING
Lawn-tractors and Rider Models
DOES THEDOES THELIGHTING CIRCUITLIGHTING CIRCUIT
USE SERIES ORUSE SERIES ORPARALLEL CIRCUITY ?PARALLEL CIRCUITY ?
PARALLELPARALLELTROUBLE SHOOTING
Lawn-tractors and Rider Models
HEAD LIGHTS
BATTERYBATTERYBATTERY
IGNITION SWITCH
3
1
2
ON
LIGHT SWITCH
Lighting CircuitLighting Circuit
Lights are glowingLights are glowing withoutwithout
the engine running!the engine running!
TROUBLE SHOOTING
The FUSESThe FUSES
Which others „safety catches“ break the circuit if Which others „safety catches“ break the circuit if there is a fault in the electrical system?there is a fault in the electrical system?
10 A fuse = protects the main and power circuits of the electronic circuit board.
25 A fuse = protects the battery charger circuit.
15 A fuse = protects the control motor circuit for grass bag dumper (where the Electric bag tipping control is FITTED).
TROUBLE SHOOTING
Lawn-tractors and Rider Models
5 A fuse = protects the 12 Volt auxiliary accessory socket (where is FITTED).
What are the logical trouble shooting steps, What are the logical trouble shooting steps, when the 10 A blows ?when the 10 A blows ?
Trouble shooting for Trouble shooting for FUSESFUSES
1.1. Find and replace the defective user (ignition block, Find and replace the defective user (ignition block, starter relay, headlamps and recharger connector)starter relay, headlamps and recharger connector)
2.2. Replace the panel/board group (PCB) with one that is Replace the panel/board group (PCB) with one that is known to work;known to work;
TROUBLE SHOOTING
Lawn-tractors and Rider Models
What are the logical trouble shooting steps, when the What are the logical trouble shooting steps, when the 25 A blows ? 25 A blows ?
1.1. Check the recharge circuit and replace fuseCheck the recharge circuit and replace fuse
Trouble shooting for Trouble shooting for FUSESFUSES
TROUBLE SHOOTING
Lawn-tractors and Rider Models
The electric system, the electronic card (PCB) The electric system, the electronic card (PCB) and the battery are protected by only one fuse.and the battery are protected by only one fuse.
Trouble shooting for Trouble shooting for FUSESFUSES
.... For .... For 63cm model63cm model
10 A10 A
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Lawn-tractors and Rider Models
So which So which MESSAGEMESSAGE can we focus on our can we focus on our troubleshooting?troubleshooting?
The operator CAN NEVER work on The operator CAN NEVER work on „UNSAFE “ condition.„UNSAFE “ condition.
TROUBLE SHOOTING
Lawn-tractors and Rider Models