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XP21
HEAT PUMP
CONTROL (A175)
CONTROL BOX
FAN MOTOR CONTROL (A177) —
PULSE-WIDTH MODULATION (PWM)
JUMPER
OFF
JUMPER
ON
J2
LED
CFM Profile Pin Select
VERIFY DC VOLTAGE OUTPUT USING FAN PWM OUT AND
COM TERMINALS. SEE TABLE 9 FOR OPTIMAL DC
VOLTAGE BASED ON CFM PROFILE USED.
COM
FAN PWM OUT
FAN PWM OUT
PARK
COM
J2
GREEN
RED
BROWN
RED
BLACK
RED
RED
GREEN
FAN MOTOR
CONTROL
YELLOW
BLACK
YELLOW
BLUE
SEE TABLE 9 FOR CFM PROFILE
SELECTION OPTIONS.
YELLOW
YELLOW
YELLOW
HIGH PRESSURE SWITCH (S4)
YELLOW
B4 FAN
MOTOR
HEAT PUMP CONTROL
Figure 5. Fan Motor Control, Wiring, Jumper Settings, Testing and LED Location
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