Service manual

Electrical Service Manual V4.0
2
2-3
CURTIS 1203A CONTROLLER
DIAGNOSIS
Machine will not
turn o
n
Attach a DC Volt
meter to t
he B+
and B
- terminals
on t
he controller
Was there
at least 23.5 v
olts
between
B+ and B-
Measure the
voltage at the
batter
y pack
Was there
at least 23.5 volt
s
at the battery
pack
Repair battery
cab
les or mail
breaker
Charge or replace
batteries
Attach the (-) lead of a DC
voltmet
er to the B(-) terminal.
Wi
th the (+) lead measure the
voltage at the RED w
ire on the
6 p
in connector on the Curtis
control with the main power
sw
itch “ON”
Was there
within 0.2 V
olts of
batter
y voltage?
Replace the
con
troller
Attach the (-) lead of a DC voltmeter
to the B(-) terminal. With the (+) lead
measure the voltage at the RED wire
wire on the main power switch with
the swi
tch “ON”
Was there
within 0.2 V
olts of
batter
y voltage?
Repair the red wire
between the switch and
controller
Attach the (-) lead of a DC voltmeter
to the B(-) t
erminal. With the (+) lead
measure t
he voltage at the YELLOW
wire wir
e on the main power switch.
Was there
within 0.2 V
olts of
batter
y voltage?
Replace the MAIN
power switch
Attach the (-) lead of a DC
voltmet
er to the B(-) terminal.
With the (+) lead measure the
voltage at the YELLOW wire on
the (+) buss b
ar
Was there
w
ithin 0.2 Volts of
battery voltage?
Call the factory
Check the power
connection
s to the Main
breaker