Condenser Fan Motor: Description and Operation

RADIATOR FAN AND CONDENSER FAN

SYSTEM OUTLINE

The radiator fan motor and A/C condenser fan motor operates according to the water temp. SW No.1, water temp. SW No.2, A/C single pressure SW, and the A/C system condition. The FAN NO.1 relay, FAN NO.2 relay, FAN NO.3 relay are turned on/off, to operate the fan motors at low speed (In series), or high speed (In parallel).

1. LOW SPEED OPERATION
Either when the A/C system is operating, or when the water temp. SW No.2 is on, the radiator fan motor and NC condenser fan motor operates at low speed.

2. HIGH SPEED OPERATION
Either when the A/C system is operating, or when the water temp. SW No.2 is on, if the water temp. SW No.1 or NC single pressure SW is on, the radiator fan motor and A/C condenser fan motor operates at high speed.