Minuteman SCV28 Operation Service Parts Care Download

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SCV 28/32 FAULT / DIAGNOSTIC CODES

Code

Technical

Description

Probable Cause

Service Action

0705

2.5V reference

error

0706

High switch

reference

error

All 070x codes – Wiring short

circuit between potentiometer

Hi and Lo reference.

Check for wiring short circuits on the 20-
way connector on the SCV, the 16-way

connector on the LCD (if used) and the

wiring to the front panel switches &

controls and those switches & controls

themselves.

0810

Potentiometer
Fault 1

All 081x codes – Throttle wiring
short or open circuits.

Check for wiring short circuits or broken wires
on the 20-way connector on the SCV, the 5
way connector on the LCD (if used) and the
wiring to the front panel speed / throttle
control and the speed / throttle control itself.

1500

Brake fault 1

All 150x codes – Check brake and
wiring for open or short circuit.

Check the traction motor connection on the
SCV and check the wiring from this connector
down to the traction motor and checking
connections all the way. Otherwise possible
fault in electro brake on traction motor or
possible controller fault.

1600

High battery
voltage

Voltage exceeds maximum.

Can be caused by poor or corroded
connections to the batteries or a battery
charger being connected.

7500

LCD Module
communications
timeout

Wiring fault on 6-way serial link
between SCV and LCD

Check the wiring and connectors on the 6 way
connections on the SCV and LCD.

7600

Brush motor
disconnected
error

Open circuit on brush motors or
brush motor wiring.

Check the brush motor connection on the SCV
and check the wiring from this connector down
to the brush motor and checking connections
all the way. Otherwise possible brush motor
fault.

7601

Brush current
foldback

Brush current overload (“thermal”
trip).

Incorrect programming, incorrectly specified
brush motor, brush motor developing a fault,
excessive resistance on brushes or brushes
pushing down too hard on floor.

7700

Vacuum motor
disconnected
error

Open circuit on vacuum motors or
vacuum motor wiring.

Check the vacuum motor connection on the
SCV and check the wiring from this connector
down to the vacuum motor and checking
connections all the way. Otherwise possible
vacuum motor fault.

7701

Vacuum current
foldback

Vacuum current overload
(“thermal” trip).

Incorrect programming, incorrectly specified
vacuum motor, vacuum motor developing a
fault, debris in vacuum motor or airways
blocked by debris.

7800

Motor fault 1

Open circuit on traction motor or
traction motor wiring.

Check the traction motor connection on the
SCV and check the wiring from this connector
down to the traction motor and checking
connections all the way. Otherwise possible
traction motor fault.

7801

Traction over
current error

Possible short circuit on traction
motor or wiring.

Check the traction motor connection on the
SCV and check the wiring from this connector
down to the traction motor and checking
connections all the way. Otherwise possible
traction motor fault.