COMFORT-AIRE Century VMH-SV Series Service Manual page 22

No. Name
1 Power Supply
2 S
3 4-WAY
4 HEAT1
5 AC-FAN
6 HEAT2
7 PMV
8 TP T4 T3
9 DC-FAN
10 TESTPORT
11 FAN_IPM
12 EE_PORT
U
13 V
W
14 COMP_IPM
Note: This section is for reference only. Please take practicality as standard.
CN#
CN6 Earth: connect to Ground
CN7 N_in: connect to N-line (208-230V AC input)
CN8 L_in: connect to L-line (208-230V AC input)
CN2 S: connect to indoor unit communication
CN60 connect to 4 way valve, 208-230V AC when is ON.
CN16 connect to compressor heater, 208-230V AC when is ON
CN5 connect to AC fan
CN19 connect to chassis heater, 208-230V AC when is ON
CN18 connect to Electric Expansion Valve
connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust
CN17
temp. sensor TP
CN41 connect to DC fan
CN23 used for testing
IPM2 IPM for DC fan
CN505 EEPROM programer port
CN27 connect to compressor
CN28 0V AC (standby)
CN29 200-300V AC (running)
IPM1 IPM for compressor
Meaning