5
CHANGES IN THE ELECTRICAL SYSTEM
Changes in the electrical system from chassis number 0E527418
5-24
BRIEF DESCRIPTION OF THE
RECIRCULATION VALVE
If switch C802 (air-conditioning recirculation
valve) is activated, a voltage is applied to point 1
of relays G257 and G258. As a result, pin 2 of
recirculation-valve motor B252 is connected to
earth and simultaneously pin 1 of B252 is
connected to the positive voltage. This will
activate motor B252 and close the recirculation
valve.
If C802 is not activated, no voltage is applied to
relays G257 and G258. As a result, the direction
of flow of the current through motor B252 is
reversed and the recirculation valve will open.
BRIEF DESCRIPTION OF THE
AIR-CONDITIONING SYSTEM
When the air-conditioning system is engaged
with switch C760, a voltage is applied to both
relay G279 and G267 through wire 4655, switch
E508 (air-conditioning compressor temperature
switch), E509 (air-conditioning high/low pressure
operating switch) and wire 4657.
As a result, the heater fan (B015) will start
operating in position 1 and the air-conditioning is
activated.
SEE THE SYSTEM MANUAL FOR MORE
INFORMATION
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