Relay Board - Carrier CAPRI-280 Operation And Service Manual

1.9 Relay Board -- Electronically Commutated DC Motors with 2-speed Input Signal
+
1
K1
2
3
K2
EF2 EF1
4
EF3 EF4
D2 D6
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a. Relays
K1 Energizes evaporator fans 1 & 2.
K2 Energizes evaporator fans 3 & 4.
K3 Energizes evaporator fan 5.
K4 Energizes evaporator fan 6.
K5 Provides the evaporator fan high output
signal.
K 6 Provides the condenser fan high output
signal. (Not used).
K 7 Energizes condenser fans 1 & 2.
K 8 Energizes condenser fans 3 & 4.
K 9 Not used
K10 Not used
K13 Energizes the A/C clutch.
K14 Energizes unloader 1.
K15 Energizes unloader 2.
K16 Energizes the high low pressure failure.
K17 Energizes the heat solenoid valve.
K18 Energizes the alarm output.
K19 Energizes the booster pump.
K20 Energizes the motor fail light.
b. Thermal Circuit Breakers 24V
CB 1 Evaporator fan #1.
CB 2 Evaporator fan #2.
CB 3 Evaporator fan #3.
CB 4 Evaporator fan #4.
CB 5 Evaporator fan #5.
CB 6 Evaporator fan #6.
CB 7 Condenser fan #1.
CB 8 Condenser fan #2.
CB 9 Condenser fan #3.
CB10 Condenser fan #4.
CB11 Spare.
CB12 Spare.
CB13 A/c clutch, unloaders 1&2
motor fail, heat valve, pressure fail
& spare output.
5
K3 K7
6
K4 D81
K8
EF HIGH
SIGNAL
D14 D17 D26
EF6 EF5
Figure 1-5 Relay Board
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
15 Amp.
7
K9
K6
8
CF2 CF1
9
K10
10
D37 D38 D41
CF2 CF2
K24 K22 K21 K23
c. Connectors
EF1-EF6 Evaporator Fans.
CF1-CF4 Condenser Fans.
JP1 External evaporator & condenser fan
thermal overload connections.
JP2 Logic board connector.
JP3 Booster pump.
JP4 A/C Clutch, Pressure fault output,
Compressor High Pressure Switch.
JP5 High pressure fail, motor fail output,
heat valve.
JP6 Unloaders 1 & 2.
EF-HIGH SIGNAL
CF-HIGH SIGNAL
d. LEDS
D 2 Evaporator fans 1 & 2 are energized.
D 6 Evaporator fans 3 & 4 are energized.
D14 Evaporator fan 5 is energized.
D17 Evaporator fan 6 is energized.
D26 Condenser fans 1 & 2 energized.
D30 Condenser fans 3 & 4 energized.
D38 Condenser fans 5 & 6 energized. (Not used).
D51 A/C clutch output active.
D54 Unloader 1 output active.
D57 Unloader 2 output active.
D60 High low pressure failure.
D63 Heat valve output active.
D66 Alarm output active.
D69
D72 Motor fail light.
D81 Evaporator fans on high.
D85 Condenser fans on high. (Not used).
1-7
JP6
13 K14 K15
11
K16 K17
12
JP5
K18 K20
D85
JP4
CF
K13
K19
HIGH
SIGNAL
JP3
CF6 CF5
JP1
Output to the evaporator
fans to operate on high
speed.
Output to condenser fans to
operate on high speed.
(Not used)
D57
D54
D63
D60
D72
D66
D51
D69
JP2
T-283