Sanyo ECO-i CHDZR07263 Series Service Manual page 142

7. Test Pin
When the test pin on the outdoor unit control PCB is short-circuited, each part can be operated individually.
• 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
1 Relay RY024 Supercooling valve 1 (SCV1)
2 Relay RY025 Supercooling valve 2 (SCV2)
3 Relay RY021 Discharge valve 2 (DCV2)
4 Relay RY020 Discharge valve 1 (DCV1)
5 Relay RY005 Bypass valve (BPV)
6 Relay RY007 Recovery valve (ORVR)
7 Relay RY006 Balance valve (BALV)
Operation
8
9
10
11
12
13
14
5 - 29
Output
Relay RY022 Pressure balance valve 1 (PBV1)
Relay RY017 Refrigerant balance valve (RBV)
Relay RY016 Refrigerant adjustment valve (RCV)
Relay RY012 Save valve (SAVE)
Relay RY023 Pressure balance valve 2 (PBV2)
Relay RY003 Crank case 2 (CH2)
Relay RY002 Crank case 1 (CH1)
3-WAY ECO-i SYSTEM
Trouble Diagnosis
Operation
5