Carrier 50HCQ07 Installation Instructions Manual page 20

Table 3 — 50HCQ Defrost Board I/O and Jumper Configurations
POINT NAME
INPUTS
G Fan
Y1 Cool 1
Y2 Cool 2
W1 Heat 1
W2 Heat 2
R Power
C Common
DFT 1
DFT 2
OUTPUTS
IFO Fan On
OF OD Fan On
RVS1
RVS2
COMP 1
COMP2
HEAT 2
COM
CONFIGURATION
Select Jumper
2 Compressor
SPEED-UP CONFIGURATION
Speed-Up Jumper
Speed-Up Jumper
NOTES:
1. Jumper for 1-3 seconds: Factory Test — The defrost interval timing
is reduced by a factor of 0.1 seconds/minute based on the posi-
tions of DIP switches SW1 and SW2 (i.e. 90 minutes will be
reduced to 9 seconds).
1 2

1

0
30 minutes
(factory default)
Fig. 30 — Defrost Control Board Location
TYPE OF I/O CONNECTION PIN NUMBER
DI, 24 vac
DI, 24 vac
DI, 24 vac
DI, 24 vac
DI, 24 vac
24 vac
24 vac
DI, 24 vac
DI, 24 vac
DO, 24 vac
DO, 24 vac
DO, 24 vac
DO, 24 vac
DO, 24 vac
DO, 24 vac
DO, 24 vac
24 vac
24 vac
24 vac
—
—
Table 4 — DIP Switch Positions
1 2

1 1

0 0
60 minutes
UNIT CONNECTION
P2-3
P2-5
P2-4
P2-7
P2-6
P3-1 CONTL BRD-8
P3-2 CONTL BRD-4
DFT-1 to DFT-1
DFT-2 to DFT-2
P3-9 REHEAT/HP-2
OF
P3-7 to P3-5
P3-6 to P3-4
P3-10 FPT1-REHEAT/HP-6
P3-8 FPT2-REHEAT/HP-8
E-HEAT
P3-3
P1-1
P1-3
JMP17
JMP18
2. Jumper for 5-20 seconds: Forced Defrost — Defrost runs for 30
seconds if DFT2 is open.
1 2
1
 
0
90 minutes
20
NOTE
CTB-G
CTB-Y1
CTB-Y2
CTB-W1
CTB-W2
—
—
OFR
— Energize in COOL
— Energize in COOL
TB4-1
TB4-3
—
— Use for 50TCQD
—
—
1 2
 
1
0
120 minutes Fan Delay
3

On
Off