Page 1301 - Workshop Manual - Aumark (BJ1051)

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Circuit-System circuit diagram

System summarization
· The current of battery is divided into two circuits after it passes main fuse F/L0: one circuit passes fuse F/L1 to the
R18 contact of main relay of condenser blower, and it is prepared for the work of condenser fan; the second circuit
passes F/L4 to R14 contact of IG power supply relay and to R13 contact of heater relay through fuse F16 to
provide power supply to blower separately. Current passes IG power supply relay when the ignition switch is
turned on, and R14 electromagnetic coil is grounded; electromagnetic coil will generate magnetic field, and
contacts of relay R14 will be closed; current of battery goes to fuse F/L4 through main fuse F/L0; through the
contact of relay R14 and fuse F18, it will be divided into 3 circuits: one circuit to the electromagnetic coil of AC
main relay R36; the second circuit goes to the electromagnetic coil of main relay R18 of condenser blower and the
electromagnetic coil of condenser relay R16; the third coil pass the contact of AC cut off relay R35 to the No. 4 pin
of AC switch, to electromagnetic coil of heater relay R13, to fuse F22, to the contact of AC main relay R36, to No.
4 pin of signal amplifier, to the contact of electromagnetic clutch relay R15, to the No. 2 pin of AC pressure
switch, and through the high voltage switch and low voltage switch inside of AC pressure switch to the No. 4pni of
AC pressure switch; and then to the No. 3 pin of signal amplifier and the electromagnetic coil of electromagnetic
clutch relay R15, prepare to run the AC.
Idle state of the AC
· Idle state of the condenser fan
IG power supply relay will be electrified when the ignition switch is turned on; the current passes fuse F18 and is
divided into 2 circuits, one circuit goes the electromagnetic coil of condenser relay R16 and to the No. 1 pin of AC
pressure switch; to the No.3 pin of AC pressure switch to ground through middle voltage switch; electromagnetic
coil will produce magnetic field and contacts of relay R16 will be closed (30 and 87 is connected); another circuit
goes to the electromagnetic coil of main relay R18 of condenser fan; electromagnetic coil will produce magnetic
field and contacts of relay R18 will be closed; then current goes through the contacts to fuse F28, to No.3 pin of
condenser fan, to No. 4 pin of condenser fan and contact of condenser relay R16 through fan motor; to the contact
of condenser regulation relay R17 through the contacts of relay R16 (30 and 87); prepare to run the condenser at
low speed.

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