Copyright Goodheart-Willcox Co., Inc. 222
________5. Which of the following will prevent the compressor in the following system from
operating?
L1
1
2
3
C
Thermostat
Run capacitor
Run capacitor
Compressor
C
S
R
Fan motor
HIGH
MEDIUM
LOW
L1 N
Selector
switch
Switch positions
Off None
Low fan L1-3
Medium fan
High fan
Low cool
Medium cool
High cool
Common
L1-2
L1-1
L1-C-3
L1-C-2
L1-C-1 Overload
Goodheart-Willcox Publisher
A. The thermostat is in the closed position.
B. The L1-C contacts on the selector switch are open.
C. The L1-2 contacts on the selector switch are open.
D. The overload is in the closed position.
Critical Thinking
Refer to the fi gure below to answer question 1.
L1 N
HIGH
LOW
RC
IFR
Indoor fan motor Fan switch
R G
Space
thermostat
24 V
X-FRMR
Goodheart-Willcox Publisher
1. Why is it that both the high and low motor speeds cannot be energized at the same time?
________5. Which of the following will prevent the compressor in the following system from
operating?
L1
1
2
3
C
Thermostat
Run capacitor
Run capacitor
Compressor
C
S
R
Fan motor
HIGH
MEDIUM
LOW
L1 N
Selector
switch
Switch positions
Off None
Low fan L1-3
Medium fan
High fan
Low cool
Medium cool
High cool
Common
L1-2
L1-1
L1-C-3
L1-C-2
L1-C-1 Overload
Goodheart-Willcox Publisher
A. The thermostat is in the closed position.
B. The L1-C contacts on the selector switch are open.
C. The L1-2 contacts on the selector switch are open.
D. The overload is in the closed position.
Critical Thinking
Refer to the fi gure below to answer question 1.
L1 N
HIGH
LOW
RC
IFR
Indoor fan motor Fan switch
R G
Space
thermostat
24 V
X-FRMR
Goodheart-Willcox Publisher
1. Why is it that both the high and low motor speeds cannot be energized at the same time?