Circuit Board Function And Troubleshooting; Hk61Ga001 And Hk61Ga003 Pcb; Printed Circuit Board Component Layout And Description - Carrier FA4ANF Service Manual

NOTES:
1. Use copper wire (75¡c min) only between disconnect switch and unit.
2. To be wired in accordance with nec and local codes.
3. If any of the original wire, as supplied, must be replaced, use the same or
4. Replace low voltage fuse with no greater than 5 AMP fuse.
5. (2) Speed Motor uses HI (BLK) and LOW (RED).
6. Smaller heaters will have fewer components.
7. Connect R to R, G to G, etc., see outdoor instructions for details.
8. Cooling controls wiring not used with electric heaters.
IF FAN RUNS CONTINUOUSLY:
1. If PCB has no low-voltage power, check blue and black fan
leads. These may be switched at sequencer/relay.
2. If PCB has low-voltage power, check fan relay to see if it is
opening and closing. It may be stuck in the normally-closed
position due to debris in relay.
TRANSFORMER FAILURE:
1. Check 208-v and 230-v transformer connections. They may be
miswired.

CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING

HK61GA001 and HK61GA003 Circuit Boards
This section of the service manual describes the HK61GA001 and
HK61GA003 printed-circuit boards (PCB) by examining the
functional operation of the printed-circuit board's components.
Step 1—PCB Component Layout and Description
Layout of the actual printed-circuit boards are depicted in
Fig. 6 and Fig. 7.
1. The low-voltage terminal board is used to connect the indoor
thermostat to the low, 24-v side of the transformer, and to
serve as a junction between the indoor thermostat and the
outdoor section.
SCHEMATIC DIAGRAM
SEE RATING PLATE FOR VOLTS & HERTZ
FIELD POWER WIRING
COOLING CONTROLS
ELECTRIC HEAT
SEE NOTE #1
L1
L1
DISCONNECT PER NEC
GND
SEE NOTE #6
YEL
YEL
LS2 HTR2 BLK
8
RELAY 1
YEL
HTR1 BLK
LS1
4
BLU
YEL
BLU
BLK
SPT
NC
G
NO R
FR
YEL
F
T
YEL 1
PCB
C
YEL
CAP
230V
COM 208V
COM
BRN BRN
RED
YEL
HI
BLK
TRAN
FM
BRN
GRN/YEL
LO RED
GND
equivalent type wire.
This compartment must be closed except
when servicing.
ROTATION
Fig. 3B—FF1D Typical Wiring Diagram
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V TO GROUND
NE CONVIENT PAS AUX INSTALLATIONS DE PLUS DE 150 V A LA TERRE
COMPONENT ARRANGEMENT
L2
L2
HTR
SYSTEM TRANSFORMER: 40.0VA
REMAINING VA AVAILABLE: 31.6VA
RELAY 1
BLK
8 6
BLK
2
4
6
0
BLK
REC
2
RELAY 1
BLK
L2 L1
22 VDC COIL
DISC
R E C 60A 60A
BLK
VIO
ORN
RED-LOW
GRY
RED BLK-HI
GND
GRN/YEL-GND
ORN
GRY
SEE NOTE #5
RED
VIO
FAN MOTOR THERMALLY PROTECTED
BRN
R W G
C CAP
COM
DISC
SEE NOTE #7
BARRIER
F
FM
INDOOR
OUTDOOR
THERMOSTAT
UNIT
FR
GND
HTR
LS
PCB
REC
SPT
TRAN
MINIMUM MOTOR SPEED SELECTION
FAN COIL SIZE
MOTOR SPEED ONE HTR
324494-101 REV. A MOTOR SPEED TWO HTR
2. Break off the tabs.
a. W2-3 — Used to control (stage) the second stage of electric
heat. The first stage controlling electric heat and the indoor
fan are interlocked through diodes.
b. W2-E — Used to control (stage) the third stage of electric
heat.
3. A fuse is used to protect the low-voltage transformer.
4. AUX 1 and AUX 2 are connections for the latent capacity
control, delay off kit, 2-speed kit and air conditioning acces-
sories.
5. F1, F2, F3, and F4 are connections for the indoor fan.
6. EAC1 and EAC2 are 240-v connections, which parallel fan
lead connections, for the electronic air cleaner.
7. L1 and L2 are 240-v connections which parallel power input.
8. T1, T2 and T3 are connections for the primary, high-voltage
side of the transformer.
9. The fan relay is controlled by the thermostat and turns the fan
on and off.
10. A plug is used as the connection for the PCB power and
electric heaters. Note the pin numbers on the plug.
11. Diodes provide DC power for the fan relay and the first stage
of electric heat: W2, W3 or E.
6
CAUTION:
ATTENTION:
LS
LS
HTR
FAN COIL/HEATER: 8.4VA
COM
RED
24 V
208 V
BRN 230 V
1
C
T
1
F
R
G
NC
PCB
NO
FR
SPT
GND
BRN
FM
CAP
BRN
YEL-COM
LEGEND
CAPACITOR
COMMON
DISCONNECT
FUSE
FAN MOTOR
FIELD POWER WIRING
PCB FAN RELAY
EQUIPMENT GROUND
HEATER
LIMIT SWITCH
MARKED TERMINAL
PLUG AND RECEPTACLE
PRINTED CIRCUIT BOARD
RECTIFIER
FAN SPEED TAP LOCATION
TRANSFORMER
UNMARKED TERMINAL
018 024 030
LO LO LO
LO LO LO
A98229