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13HPD SERIES
Table 11. Defrost Control Board (DCB) Inputs, Outputs and Configurable Settings
DCB
Location
DCB Label or
Description
Purpose
Function
P1
TEST
Test Mode
See Test Mode on page 22 for further details.
P1
30, 60, 90
Defrost Temperature
Termination (Jumper) Pins
The DCB as illustrated in figure 28 has valid selections which
are: 30, 60, and 90°F (−1, 16 and 32°C). The shunt
termination pin is factory set at 50°F (10°C). If the
temperature shunt is not installed, the default termination
temperature is 90°F (32°C).
P2
W1
24VAC Thermostat Input /
Output
24VAC input/output from indoor thermostat to indoor unit.
C
24VAC Common
24VAC common
L
Thermostat Service Light
Thermostat service light connection.
R
24VAC
24VAC
O
Thermostat Input
Reversing valve solenoid.
Y1
Thermostat Input
Controls the operation of the unit.
P5
DELAY
Delay Mode
The DCB has a field−selectable function to reduce
occasional sounds that may occur while the unit is cycling in
and out of the defrost mode. When a jumper is installed on
the DELAY pins, the compressor will be cycled off for 30
seconds going in and out of the defrost mode. Units are
shipped with jumper installed on DELAY pins.
NOTE − The 30 second off cycle is NOT functional when
jumpering the TEST pins on P1.
P6
TST, PS DF, C, R, O, Y1
Factory Test Connectors
Factory Use Only.
DS1
RED LED
Diagnostic LED
Valid states for DCB’s two LEDs are OFF, ON and
FLASHING which indicate diagnostics conditions that are
described in table 10.
DS2
GREEN LED
FAN
TWO CONNECTORS
Condenser Fan Operation
These two connections provide power for the condenser fan.
O OUT
O OUT
24VAC output
24VAC output connection for reversing valve.
LO−PS
LO−PS
Low−Pressure Switch
Not Used.
DF
DF
Defrost Thermostat
Defrost thermostat connection points.
Y1 OUT
Y1 OUT
24VAC Common Output
24VAC common output, switched for enabling compressor
contactor.
HS−PS
HS−PS
High−Pressure Switch
(Optional)
Not Used.
L
L
Line output
24VAC service light output.
24V
24V
24VAC output
Not Used.
