10-M5
ME8200, ME9000, WSM
CABIN
(2) Air Conditioner Main Relay and Compressor Relay
Remove the outer roof and the relays are visible at
the ceiling center of the cabin : A/C main relay (9) and
compressor relay (5). The blower fan is adjusted for the
air flow rate by a signal from the fan switch on the control
panel.
Among the air conditioner components, current flows
to the blower motor (10) and magnetic clutch. If all of
these current were to be passed through the main switch
(3) and supplied, the current would be too large for the
main switch (3) so that there will be danger or burning out
the main switch contact. If the current were to be passed
directly from the battery (1), forgetting to turn off the
blower motor could result in a discharged battery.
To protect against such trouble, A/C main relay (9)
has been provided. A/C main relay (9) has been made
so that when current flows through its coil, the contact
close to supply the power from the battery. By employing
A/C main relay (9), the current flowing through the main
switch (3) has been decreased as only a small current is
required to actuate the relay. Thus there will be no
danger of burning out the switch contact, and when the
main switch is opened, the relay contact will open at the
same time. This action stops the current flow in the air
conditioner circuit so that there will also be no chance of
the battery discharging.
W1013975
(1) Battery
(2) Slow Blow Fuse
(3) Main Switch
(4) A/C Switch (Air Conditioner)
(5) Compressor Relay
(6) Thermo Switch
(7) A/C Pressure Switch
(8) Compressor
(9) A/C Main Relay
(10) Blower Motor
(11) Blower Resistance
(12) Blower Switch
(13) Blower High Relay
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