Integrated Fuse Board (IFB)
The Integrated Fuse Board (IFB) is located on the
inside of the front frame wall, beside the traction
and lift motor controllers. The IFB can be accessed
by removing the operator compartment covers. See
Figure 12. The IFB is used to pre-charge the power
amplifiers in the motor controllers when the bat-
tery is connected to the lift truck. When the key
switch is turned to the ON position, the IFB closes
the K1 relay on the IFB to provide power to the lift
truck logic circuits.
NOTE:
The IFB is voltage specific to the lift truck.
Though some are similar in appearance, not all
IFBs are interchangeable. Refer to the Parts Man-
ual when replacing the IFB for proper part selec-
tion.
The IFB also provides power for electrical compo-
nents and optional equipment that may be installed
on the lift truck. IFBs are specific for 24 volt and 36
volt lift trucks, and may be identified by the part
number located on the IFB connector. See Fig-
ure 12. All IFBs for 36-volt units are equipped with
a 24-volt regulator to power 24-volt accessories. An
optional 12-volt regulator is available on both 24-
and 36-volt IFBs depending on truck options.
1. 7.5 AMP FUSE (JP2)
2. 10 AMP FUSES (FOUR PLACES)
3. IDENTIFICATION LABEL ON CONNECTOR
Figure 12. Integrated Fuse Board (IFB)
NOTE:
The integrated fuse board is not repairable.
If damaged, it must be replaced. Check the IFB for
signs of damaged or burned components. Fuses are
the only replaceable component on the IFB.
Fuses
WARNING
Making repairs with the battery connected can
cause a short circuit. Disconnect the battery by
separating the connectors before opening the
electrical compartment covers or inspecting/
repairing the electrical system. High current flow
during a short circuit can cause injury or parts
damage.
The fuses are found on the IFB. See Figure 12. The
condition of the fuses can often be checked visually.
If unsure of condition, check fuses for continuity
with an ohmmeter.
1.
Completely lower the mast and park the lift
truck in a safe, level location. Turn the key
switch to the OFF position and disconnect the
battery. Discharge the capacitors. See Dis-
charging the Internal Capacitors.
2.
Remove the two screws securing the plastic
cover on the IFB for access to the fuses.
3.
Test the fuses using an ohmmeter to check
fuses:
a.
Infinite Resistance = Defective Fuse
b.
Continuity = Fuse Ok
4.
Replace any defective fuse with a proper rated
fuse. See Figure 12.
REPLACE
1.
Move the lift truck to a safe, level area and
completely lower the mast. Turn the key switch
to the OFF position and attach a DO NOT OP-
ERATE tag to the control handle. Block the
drive wheel to prevent unexpected movement.
Integrated Fuse Board (IFB)
2200 SRM 1612
20
