Electrical System; Electrical Circuit - Kubota B1830 Workshop Manual

B1830,B2230,B2530,B3030, WSM

4. ELECTRICAL SYSTEM

[1] ELECTRICAL CIRCUIT

(1) Battery
(2) Slow Blow Fuse
(3) Main Switch
(4) Diode
The process of the magnetic clutch being engaged is shown below.
Main Switch (3) ON → A/C Switch (9) ON → Blower Switch (9) ON (Low, medium or high) → Compressor Relay
Contact (5) → Thermostat (Thermo Switch) (7) ON (the thermostat temperature is more than 4 °C (39.2 °F)) →
Pressure Switch (5) ON (if refrigerant pressure is between 0.196 MPa (2.0 kgf/cm
2
(30.0 kgf/cm , 426 psi) → Compressor Magnet Clutch (6) engaged.
(5) Compressor Relay
(6) Compressor Magnet Clutch
(7) Thermo Switch
10-M21
(8) Pressure Switch
(9) A/C Blower Switch
(10) Diode
CABIN
(11) A/C Blower Relay
(12) A/C Blower Motor
(13) A/C Blower Resistor
2
, 28.4 psi) and 2.94 MPa
9Y1210003CAM0027US0
KiSC issued 05, 2012 A