Carrier 42HWG009 Technical Data & Service Manual page 32

3) 42HWG018/024 & HWG455C/605C-SERIES INDOOR UNIT
LEGEND
K: RELAY
TB: TERMINAL BLOCK
TP: THERMAL PROTECTOR
CN: CONNECTOR
EC1: FAN MOTOR CAPACITOR
IDC Th: INDOOR COIL THERMISTOR
IDFM: INDOOR FAN MOTOR
FCU: FAN COIL UNIT
CDU: CONDENSING UNIT
RA Th: ROOM AIR THERMISTOR
MOV: METAL OXIDE VARISTOR
CB: TIME DELAY FUSE or CIRCUIT BREAKER
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MSW: MAIN SWITCH
HS: HALL (RPM) SENSOR
TRANS: TRANSFORMER
COMP: COMPRESSOR
STM: STEP MOTOR