DC Inverter Air
3.2. Electrical Control of Outdoor Unit and Troubleshooting
1) Main Control Board of Outdoor Unit(36K 48K 60K )
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Description of Main Control Board of Outdoor Unit
1 — Low‐wind output of AC motor of outdoor unit,220‐240V
2 — Mid‐wind output of AC motor of outdoor unit, 220‐240V
3 — High‐wind output of AC motor of outdoor unit, 220‐240V
4 — N output of motherboard of outdoor unit
5 — Main reserved output of outdoor unit, 220‐240V
6 — Heating belt of compressor, 220‐240V
7 — Motherboard reserved output of outdoor unit,220‐240V
8 — Communication interface between outdoor unit and indoor unit, RS‐485 signal
9 — OTC Interface
10— Monitoring interface of outdoor unit (RS‐485 signal)
11— LWE2 Outdoor electronic expansion valve
12— LWE1 outdoor electronic expansion valve (reserved)
13— Communication terminal between outdoor unit motherboard and IPM module, RS‐485 signals
14— Outdoor unit capacity (model) PID
15— TC, Condenser coil temperature sensor input,
TABM(T4), outdoor ambient temperature sensor input
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