Carrier 38MHRC Service Manual page 32

38MHRC: Service Manual
PCB DIAGRAMS (COOLING ONLY) (CONT)
No. Name
1 Power Supply
2 S
3 4-WAY
4 AC-FAN
5 HEAT2
6 TP T4 T3
7 PMV
8 HEAT1
9 DC-FAN
10 TESTPORT
11 FAN_IPM
12 COMP_IPM
13 U
V
W
14 EE_PORT
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 37 —Size 24K (208/230V)
Table 15 — LED Codes
CN#
Earth: connect to Ground
CN6
N_in: connect to N-line (208-230V AC input)
CN7
L_in: connect to L-line (208-230V AC input)
CN8
CN2 S: connect to indoor unit communication
Connect to 4 way valve, 208-230V AC when is ON.
CN60
Connect to AC fan
CN5
Connect to chassis heater, 208-230V AC when is ON
CN19
CN17 Connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust temp. sensor TP
CN18 Connect to Electric Expansion Valve
Connect to compressor heater, 208-230V AC when is ON
CN16
Connect to DC fan
CN414
Used for testing
CN23
IPM501 IPM for DC fan
IPM for compressor
IPM1
Connect to compressor
CN27
0V AC (standby)
CN28
CN29 200-300V AC (running)
CN505 EEPROM programmer port
Meaning
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