38MHRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
31
PCB DIAGRAMS (COOLING ONLY) (CONT)
A210594
Fig. 36 —Size 12K (208/230V)
Table 14 — LED Codes
No. Name CN# Meaning
1
Power Supply
CN3 Earth: connect to Ground
CN1 N_in: connect to N-line (100-130V AC input)
CN2 L_in: connect to L-line (100-130V AC input)
2SCN16 S: connect to indoor unit communication
34-WAYCN60 Connect to 4 way valve, 100-130V AC when is ON.
4HEAT1CN17 Connect to compressor heater, 100-130V AC when is ON
5HEAT2CN15 Connect to chassis heater, 100-130V AC when is ON
6AC-FANCN25 Connect to AC fan
7 TESTPORT CN6 Used for testing
8 TP T4 T3 CN21 Connect to pipe temp. sensor T3, ambient temp. sensor T4, exhaust temp. sensor TP
9 DC-FAN CN7 Connect to DC fan
10 PMV CN31 Connect to Electric Expansion Valve
11 FAN_IPM IPM 501 IPM for DC fan
12 W CN28 Connect to compressor
V CN29 0V AC (standby)
U CN30 10-230V AC (running)
13 COMP_IPM IPM 1 IPM for compressor
14 BR1 BR1 Bridge
15 CN4 CN4_2
Connect to reactor
CN4_3
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