TCM FB30-7 - Page 52

3. CONTROL SYSTEM
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No.
25
[ 502]
26
27
[ 502]
28
41
[ 308]
42
[ 308]
67
[ 502]
69
[ 303]
Problem
Traveling motor temp.
rises abnormally
Traveling controller
temp. abnormal
Traveling motor thermo
sensor output defective
Traveling motor
temperature abnormal
Traveling speed sensor A
output defective
Traveling speed sensor B
output defective
Traveling inching over.
* This error code might
also occur due to an
improper operation by
the operator.
Quick charge function
defective
(Defective capacitor
charge on traveling
capacitor board)
Error
The truck can move.
(This error is detected
when the traveling
controller temp. exceeds
110°C, and the current
is restricted to cause low
output.)
The truck won’t move.
(The error is detected
when the temperature
exceeds 115°C, and
truck does not move.)
The truck moves in a
usual way.
(like at normal
temperature)
The truck won’t move.
(The error is detected
when the temperature
exceeds 155°C, and
truck does not move.)
The truck won’t move.
The truck won’t move.
The truck won’t move.
Put F/R direction switch
in neutral, turn off
accelerator and brake
switch. If the problem
persists, go to the
Remedy section.
The truck moves
normally.
(This error is also
detected when the error
code 01 occurs.)
Contactor ON timing is
too late.
Remedy
Proceed with remedy in numerical order of encircled numbers.
① Cool down traveling motor.
② Check the resistance/voltage of traveling motor
thermo sensor, and change if needed.
③ Check harness between CN11-3, 4 (CPU board)
and traveling motor thermo sensor, and repair or
change if needed.
① Cool down the controller.
②  CheckTMDU,TMDVandTMDWforloose
ttingscrews.
③ Check the resistance/voltage of thermo sensor
(THD), and change the sensor if needed.
④ Check harness between CN7-5, 11 (CPU board)
and thermo sensor (THD), and repair or change if
needed.
⑤ Check harness between CN9-6 (CPU board) and
CN1R-6 (power supply board), and repair or
change if needed.
① Check traveling motor thermo sensor voltage,
and change if needed.
② Check harness between CN11-3, 4 (CPU board)
and traveling motor thermo sensor, and repair or
change if needed.
① Cool down the traveling motor.
② Check the resistance/voltage of traveling motor
thermo sensor, and change if needed.
③ Check harness between CN11-3, 4 (CPU board)
and traveling motor thermo sensor, and repair or
change if needed.
① Check harness between CN2-3, 4 (CPU board)
and traveling speed sensor A, and repair or
change if needed.
② Check traveling speed sensor A and repair or
change if needed.
③ Change traveling motor.
(The engagement of sensor and slit plate inside
motor is improper.)
① Check harness between CN11-5, 6 (CPU board)
and traveling speed sensor B, and repair or
change if needed.
② Check traveling speed sensor B and repair or
change if needed.
③ Change traveling motor.
(The engagement of sensor and slit plate inside
motor is improper.)
① Put the F/R direction switch in neutral, turn the
accelerator and brake off.
② Check accelerator, brake and direction switch for
shoring, and repair or change if needed.
③ Check the circuit connectors for looseness. Check
harnesses, and repair or change if needed.
① If the truck won’t move, check the error code 01
rst.
② Change CPU board (quick charge driving Tr and
resistance defective)
Reset
The
traveling
motor will
restore to
normal
when its
temperature
drops below
145°C.
The
controller
will restore
to normal
when its
temperature
drops below
115°C.
Restore to
normal.
The truck
will restore
to normal
when the
temperature
drops
below
165°C.
Restore to
normal.
Restore to
normal.
Turn off
accelerator,
F/R switch
and brake.
Turn off
key switch.
Remarks
Thermo sensor (THD)
voltage under normal
condition:
0.2 V to 4.95 V
The resistance/voltage
of thermo sensor under
normal condition:
10.7 kΩ/3.5 V (±10%) at
25°C
Thermo sensor (THD)
voltage under normal
condition:
0.2 V to 4.95 V
The resistance/voltage
of thermo sensor under
normal condition:
20 kΩ/4.0 V (±10%) at
25°C
Thermo sensor voltage
when the error is detected:
less than 0.2 V and more
than 4.95 V
Thermo sensor voltage
under normal condition:
0.2 V to 4.95 V
The resistance/voltage
of thermo sensor under
normal condition:
10.7 kΩ/3.5 V (±10%) at
25°C
This error code is
displayed when more than
the stall current x 0.7/10
seconds occurs.
The contactor ON timing
is delayed by turning the
key switch ON with the
capacitor not fully charged.
In addition, an arc occurs
when the contactor turns
on, promoting the wear of
contactor.
Numbers in brackets are error codes that appear on the meter panel.