Mitsubishi FB13PNT, Quick Start Manual

Page: 83 / 292

1-70 1-70
CHAPTER 1 CONTROLLER CHAPTER 1 CONTROLLER
8 8..5 5 C Ch he ecck kiin ng I g In nv ve errtte err
8 8..6 6 R Re eg ge en ne erra attiio on n C Ch he ecck k
CAUTION CAUTION
Disconnect the battery plug and discharge the inverters before working on electrical system. Disconnect the battery plug and discharge the inverters before working on electrical system.
(1) (1) Disco Disconnect nnect all five all five powe power cabl r cables fro es from P, N, U m P, N, U, V and W , V and W
terminals. terminals.
(2) (2) Chec Check the re k the resista sistance be nce betwee tween the ter n the terminal a minal as shown i s shown in n
the following table. the following table.
500963 500963
- -
+ +
Positive Positive
probe probe
N Neg egat atiive p ve pro robe be Re Resi sist stan ance ( ce (o ohm hm))
N N
U U
1 k to 1 k to
∞ ∞
V V
W W
U U
P P V V
V V
Note: Short- or Note: Short- or open-circuits of the inverter MOSFET can be determined with this check. Other internal faults cannot be open-circuits of the inverter MOSFET can be determined with this check. Other internal faults cannot be
determined with this check. determined with this check.
The AC m The AC motor uses otor uses a common a common circuit fo circuit for current r current flow in bo flow in both loading a th loading and regener nd regeneration. The ation. The following pro following procedure w cedure will check th ill check the e
regenerat regeneration ion operation. operation.
(1) (1) Plac Place the cla e the clamp amm mp ammeter o eter onto th nto the cable c e cable connec onnected to ted to
the inverter's the inverter's
(1) (1) term terminal (u inal (use DC cu se DC curren rrent rang t range). Th e). This is pos is is positive itive
direction as current flows from the battery to the direction as current flows from the battery to the
inverter.
inverter.
(2) (2) Run the t Run the truck fo ruck forwar rward. With t d. With the dir he directio ection lever s n lever shifte hifted d
in F position, release the accelerator pedal. Then in F position, release the accelerator pedal. Then
perform a full-reverse operation.
perform a full-reverse operation.
(3) (3) The cla The clamp amm mp ammete eter shoul r should show a n d show a negat egative val ive value. Thi ue. Thiss
value becomes the value becomes the regenerat regeneration current. ion current.
500964 500964
Clamp ammeter Clamp ammeter
setting direction setting direction
Energy is generated when a motor is rotated by an external force. The regeneration power is produced when this energy is Energy is generated when a motor is rotated by an external force. The regeneration power is produced when this energy is
larger than the one that
larger than the one that is consumed by the controller and is consumed by the controller and motor. This means that the motor. This means that the regeneratio regeneration current is not n current is not measured if measured if
the speed or load changes gradually. the speed or load changes gradually.