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W-2WAY ECO-i SYSTEM
Trouble Diagnosis
7. Test Pin
When the test pin on the outdoor unit control PCB is short-circuited, each part can be operated individually.
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After turning OFF the main unit power, short circuit the test pin (CN022, WHT), then turn the power back ON.
Output is performed in the sequence shown in the table below, for 0.5 seconds each.
Output Operation Output Operation
1 Relay RY024 4-way valve (205) 11 Relay RY012 Save valve (SAVE)
2—— 12——
3 — — 13 Relay RY003 Crank case 2 (CH2)
4 — — 14 Relay RY002 Crank case 1 (CH1)
5 Relay RY005 Bypass valve (BPV)
6 Relay RY007 Recovery valve (ORVR)
7——
8——
9 Relay RY017 Refrigerant balance valve (RBV)
10 Relay RY016 Refrigerant adjustment valve (RCV)