Sanyo 2-WAY ECO-i SPW-KR74GXH56A - Test Pin

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7. Test Pin
W-2WAY ECO-i SYSTEM
Trouble Diagnosis
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, white), 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 Supercooling valve 1 (SCV1) 11 Relay RY012 Save valve (SAVE)
2 Relay RY025 Supercooling valve 2 (SCV2) 12 Relay RY023 Pressure balance valve 2 (PBV2)
3 Relay RY021 Discharge valve 2 (DCV2) 13 Relay RY003 Crank case 2 (CH2)
4 Relay RY020 Discharge valve 1 (DCV1) 14 Relay RY002 Crank case 1 (CH1)
5 Relay RY005 Bypass valve (BPV) 15 Relay RY019 Supercooling valve 3 (SCV3)
6 Relay RY007 Recovery valve (ORVR) 16 Relay RY026 Discharge valve 3 (DCV3)
7 Relay RY006 Balance valve (BALV) 17 Relay RY027 Pressure balance valve 3 (PBV3)
8 Relay RY022 Pressure balance valve 1 (PBV1) 18 Relay RY004 Crank case 3 (CH3)
9 Relay RY017 Refrigerant balance valve (RBV)
10 Relay RY016 Refrigerant adjustment valve (RCV)
W-2WAYECO-iSYSTEMEng5.indd29W-2WAYECO-iSYSTEMEng5.indd29 2008/09/0217:46:482008/09/0217:46:48