TCM FB30-8 - Fast Charge Resistance (Rch); MC Contactor

- 20 -
2. ELECTRICAL PARTS AND PROCEDURES FOR CHECKING
2.2.5 MC CONTACTOR
Checking procedure
① Check the mechanical action
Check the contactors separately.
•
Visually check the contacts, coil and connectors for damage
•
or remarkable discoloration.
Replace any failed MC contactor with a new one.
•
② Checking the coil
Remove the coil wiring connector.
•
Set the multimeter to the resistance range of x100 Ω and
•
measure the resistance between the terminals.
Determine whether the contactor is defective or not according to the resistance value measured.
•
Resistance value (key switch OFF, battery connectors disconnected, at 20°C [68°F])
Resistance Judgment
about 20 Ω Good
∞ Defective (replace contactor with a new one)
③ Checking the contacts
Check the contacts visually, replacing any contactor with a new one if any of the contact has a
•
severely rough surface or serious wear.
Wear limit: 0.5 mm [0.0197 in.]
2.2.6 FAST CHARGE RESISTANCE (RCH)
The capacitor inside the inverter unit is charged through the fast
charge resistance (RCH) by the battery, to prevent erroneous detection
of a short-circuit in the main circuit.
Checking procedure
① Visually check the RCH for damage or remarkable discoloration.
② Set the multimeter to the resistance range of x100 Ω and measure
the resistance between the terminals.
③ Determine whether the RCH is defective or not according to the resistance value measured.
Resistance Judgment
about 39 Ω Good
0 Ω Defective (short circuit)
∞ Defective (circuit open)
コンタクタ
CONTACTOR