Carrier 50HCQA07 - Page 20

20
Fig. 30 — Defrost Control Board Location
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).
2. Jumper for 5-20 seconds: Forced Defrost — Defrost runs for 30
seconds if DFT2 is open.
Table 3 — 50HCQ Defrost Board I/O and Jumper Configurations
POINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTE
INPUTS
G Fan DI, 24 vac P2-3 CTB-G
Y1 Cool 1 DI, 24 vac P2-5 CTB-Y1
Y2 Cool 2 DI, 24 vac P2-4 CTB-Y2
W1 Heat 1 DI, 24 vac P2-7 CTB-W1
W2 Heat 2 DI, 24 vac P2-6 CTB-W2
R Power 24 vac P3-1 CONTL BRD-8
C Common 24 vac P3-2 CONTL BRD-4
DFT 1 DI, 24 vac DFT-1 to DFT-1 —
DFT 2 DI, 24 vac DFT-2 to DFT-2 —
OUTPUTS
IFO Fan On DO, 24 vac P3-9 REHEAT/HP-2
OF OD Fan On DO, 24 vac OF OFR
RVS1 DO, 24 vac P3-7 to P3-5 — Energize in COOL
RVS2 DO, 24 vac P3-6 to P3-4 — Energize in COOL
COMP 1 DO, 24 vac P3-10 FPT1-REHEAT/HP-6
COMP2 DO, 24 vac P3-8 FPT2-REHEAT/HP-8
HEAT 2 DO, 24 vac E-HEAT TB4-1
COM 24 vac P3-3 TB4-3
CONFIGURATION
Select Jumper 24 vac P1-1 —
2 Compressor 24 vac P1-3 — Use for 50TCQD
SPEED-UP CONFIGURATION
Speed-Up Jumper — JMP17 —
Speed-Up Jumper — JMP18 —
Table 4 — DIP Switch Positions
12 12 12 12 3
1  1  111  On
0  0  0 00Off
30 minutes
(factory default)
60 minutes 90 minutes 120 minutes Fan Delay