Mars Comfort-Aire Century VCD-SA Series Service Manual page 82

W2
W1/E
O/B
Y
G
L
C
R
DH
THERMOSTAT
DH R C L G Y1
INDOOR UNIT
S4-2 DIP switch o
Perform disconnection and
short-circuit to achieve
partition, control or dehumidi cation
• Wiring for 3H and 2C thermostat
E
O/B
Y2
Y1
G
L
C
R
DH
THERMOSTAT
DH R C L G Y1
INDOOR UNIT
S4-2 DIP switch o
Perform disconnection and
short-circuit to achieve
partition, control or dehumidi cation
• Wiring for 3H and 2C thermostat
W1/E
O/B
Y2
Y1
G
L
C
R
DH
THERMOSTAT
DH R C L G Y1
INDOOR UNIT
S4-2 DIP switch o
Perform disconnection and
short-circuit to achieve
partition, control or dehumidi cation
• Wiring for 2H and 2C thermostat
O/B
Y2
Y1
G
C
R
THERMOSTAT
C
DH R L G Y1
INDOOR UNIT
• Wiring for 2H and 1C thermostat
B W W1 W2 E R C Y1 Y2 B W D
OUTDOOR UNIT
S4-1 DIP switch o
Disconnect and short
circuit to realize heating
segment
R C Y1 Y2 B W D
B W W1 W2 E
OUTDOOR UNIT
Emergency heating control two groups
of electric heating at the same time
B W W1 W2 E R C Y1 Y2 B W D
S4-1 DIP switch o
Disconnect and short
circuit to realize heating
segment
R C Y1 Y2 B W D
B W W1 W2 E
OUTDOOR UNIT
 10. Engineering of Electrical Wring
W/E
O/B
Y
G
C
R
THERMOSTAT
C
DH R L G
INDOOR UNIT
L
• Wiring for 1H and 1C thermostat
O/B
Y
G
C
R
THERMOSTAT
DH R C L G
INDOOR UNIT
• Wiring for 1H and 1C thermostat
L
W
Y
G
C
R
THERMOSTAT
DH R C L G
INDOOR UNIT
Note:
When the indoor and outdoor unit is connected without
communication (connection mode C), indoor sensor fault
and fan fault, the indoor unit plate outputs L signal to the
temperature controller, and the temperature controller
shall send out stop command to the outdoor unit .
L
If the temperature controller provided by the customer
is not equipped with the output stop instruction of the
outdoor unit , the outdoor units are not allowed to run
in the non-communication mode. Please use connection
mode B.
3. Optional function wiring
3.1 Condensate overflow switch
The unit will accommodate a remote condensate overflow
switch. To enable, remote jumper J1, and connect the
L
installer provided condensate overflow device to CN5 per
below. When an overflow condition is present, the device
should open connection signaling the unit to turn off the
system.
Service Manual - VCDxxSA
R C Y1 Y2
Y1 B W W1 W2 E
OUTDOOR UNIT
S4-1 DIP switch o
Disconnect and short
circuit to realize heating
segment
B W W1 W2 E R C Y1 Y2
Y1
OUTDOOR UNIT
B W W1 W2 E R C Y1 Y2
Y1
OUTDOOR UNIT

B W D L
B W D L
B W D L