TCM FB-8 Series, Service Manual

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3. TROUBLESHOOTING GUIDE
(2) Load-handling system (including trucks with an Orbitr
ol steering system) (1/3)
Error code on display
Error description
Problem
Resetting
Error code conditions
LED code
Page
blinks.
Load-handling system neutral interlock
The load handling system won’
t work.
Lift lock solenoid OFF
.
Turn the key switch ON when: •
the load-handling levers are in neutral.
When the key switch is turned ON: •
A
load-handling signal is present (i.e., the
seat switch is ON).
01
58
402
Pump motor inverter unit temp. abnormal
The load handling system won’
t work.
The temp. drops to less than 109°C [228°F].
The temp. rises above 109°C [228°F].
34
58
403
Pump motor inverter unit temp. too high
The load handling system works (but the output current is limited).
The temp. drops to 90°C [194°F] or below
.
The temp. rises above 94°C [201°F].
33
58
404
Pump motor inverter unit thermosensor 1 (TMD1)
AD input range abnormal
The load-handling output is limited.
Automatically resets when the input returns to normal.
The thermosensor voltage drops below 0.2
V
or rises above 4.92
V.
31
58
Pump motor inverter unit thermosensor 2 (TMD2)
AD input range abnormal
32
405
Pump motor temp. abnormal
The load handling system won’
t work.
The temp. drops to less than 115°C [31
1°F].
The temp. rises above 155°C [31
1°F].
37
58
406
Pump motor temp. too high
The load handling system works (but the output current is limited).
The temp. drops to 135°C [275°F] or below
.
The temp. rises above 145°C [293°F].
36
58
407
Pump motor thermosensor defective AD input range abnormal
The load-handling output is limited.
Automatically resets when the input returns to normal.
The thermosensor voltage drops below 0.15 V
or rises above 4.92
V.
35
59
410
Rotation sensor defective •
The
A
or B phase pulse is missing.
•
The
A
and B phase pulses are missing.
The load handling system won’
t work.
Automatically resets when the input returns to normal.
A
load-handling signal (including operation
of the steering wheel during OBT) is present an
d
sp
ee
d
pu
ls
e
in
pu
ts
(b
ot
h
A
a
nd
B
p
ha
se
s)
are absent. The current equivalent to the maximum torque (i.e., the torque command is for more than 60% of full current) continues for 15 seconds or longer
.
73
59
Rotation sensor defective Bearing defective (Stall signals detected continuously)
The load-handling output is limited.
Automatically resets when the input returns to normal.
74
59
412
Lift potentiometer defective
The load handling system won’
t work.
Automatically resets when the input returns to normal.
The lift potentiometer output voltage drops below 0.2
V
or rises above 4.8
V.
06
59