Relay Board (12--00371--01) - Carrier 68RM35-610 Operation And Service

1.3 RELAY BOARD (12- -00371- -01)
a. Relays
K1 Energizes evaporator fans in low speed
K2 Energizes evaporator fans in high speed
(not energized in low speed).
K 7 Energizes condenser fans in low speed
K 8 Energizes condenser in high speed
(not energized in low speed).
K13 Energizes the A/C clutch and liquid line
solenoid valve.
K14 Energizes unloader 1.
K15 Energizes unloader 2.
K16 Spare.
K17 Energizes reheat coolant valve
K18 Energizes the fault light output.
K19 Energizes the boost pump.
K20 Spare.
b. Connectors
JP1 Jumpers
JP2 Logic board connector.
JP3 Boost pump.
JP4 A/C clutch, liquid line solenoid valve and
fault output.
JP5 Floor blower relay.
JP6 Unloaders 1 & 2.
JP7 Evaporator fan relays.
JP8 24 Volt power input.
JP9 Condenser fan relays.
T--356
JP7
JP8
JP9
Figure 1-5 Relay Board (12- -00371- -01)
1--6
JP2
c. LEDS
D 2 Relay K2 output active (evaporator fan
high
speed relay energized)
D 6 Relay K1 output active (evaporator fan
relay
energized)
D26 Relay K7 output active (condenser fan
relay
energized)
D30 Relay K8 output active (condenser fan
high speed relay energized)
D51 A/C clutch and liquid line solenoid valve
output active.
D54 Unloader 1 output active.
D57 Unloader 2 output active.
D63 Heat output active (RCV).
D66 Fault output active.
D69 Boost pump output active.
D72 Floor blower output active.
d. Fuses
F1 Logic board
F7 Condenser motor contactors and speed
relays.
F13 All other control devices.
03/11