28
TK 56433-5-MM-EN
Battery Load Test
1. Verify battery voltage of at least 12.5v before load
testing.
2. Apply 50% Cold Cranking Amps (CCA) load for 15
seconds and verify minimum voltage of 9.6v.
Battery Cables
The units use 0-gauge battery cables to ensure reliable
starting in extremely cold weather. Verify the use of the
0-gauge battery cables when replacing the battery
cables. Refer to the unit Parts Manual for the correct
part numbers.
Base Controller
Figure 10.
SR-3 Base Controller
Base Controller Fuse Size & Function
Fuse
Size
Function
F2
15A
Power to On/Off Switch
F3
40A
Power to Fuel Sol Pull-In/Starter Solenoid
F4
None
or 2A
No fuse - all Bosch and TK alternators (See
Note)
2A fuse - all Prestolite alternators (See Note)
F5
60A
Preheat Circuit (See Note)
F6
15A
Power to Damper and High Speed Solenoids
Fuse
Size
Function
F7
2A
Switch On Power to CAN Bus
F8
5A
2A power to CAN Connector J12
F9
5A
2A power to CAN Connector J14
F10
10A
Power to On Relay (Right Position)
Bypass HMI Control of Power (Left Position)
F11
10A
Power to Auto Fresh Air Solenoid
F12
5A
2A power to CAN Connector J13
F13
2A
Power to Remote Lights
F15
P/S
On/Off Relay (See Note)
F20
2A
Power to Alternator Sense
F25
7.5A
Power to HPCO
Notes:
1.
Fuse F4 must be in place for Prestolite alternators to
charge. Fuse F4 must be removed for Bosch and
Thermo King alternators. Service Parts Base
Controllers are shipped without the F4 fuse.
2.
The F5 preheat fuse is a “slow blow” type fuse. It is
designed for use with the engine air pre-heater.
Always replace the fuse with the TK specified fuse.
Service Parts Base Controllers are shipped without
the F5 fuse.
3.
The device identified as F15 is a polyswitch. This
polyswitch provides over-current protection for the
On/Off relay. The polyswitch will reset automatically
and is not field repairable.
Fuse F10
There are three in-line fuse clips that allow for two
configurations of the F10 fuse. The right position is the
normal position. This position has a white bar below it
on the circuit board. When fuse F10 is installed in the
right position, control power is routed to the K9 On/Off
Relay contacts. The On/Off keys on the HMI Control
Panel energize and de-energize the K9 On/Off Relay.
When the K9 On/Off Relay is energized, power is
supplied through the normally open K9 contacts to turn
the unit on.
When fuse F10 is installed in the left position, power
bypasses the K9 On/Off relay contacts and the unit will
start and run without the HMI Control Panel connected.
T
Th
hiiss ffu
usse
e p
po
ossiittiio
on
n iiss ffo
orr e
em
me
errg
ge
en
nccy
y b
by
yp
pa
assss
o
op
pe
erra
attiio
on
n o
on
nlly
y.. Do not operate the unit with the F10
fuse installed in the left position unless absolutely
necessary.
IIm
mp
po
orrtta
an
ntt:: If fuse F10 is installed in the left position,
the unit may start and run. If the HMI
Control Panel is connected and functional,
the On and Off keys will still work. The Off
key will turn the unit off if fuse F10 is in the
left position, but the Base Controller will
remain powered up.
