Test Pin - Sanyo CHDXR09663* Service Manual

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 4-way valve (205)
2 — —
3 — —
4 — —
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)
Operation
11
12
13
14
5 - 29
Output
Relay RY012 Save valve (SAVE)
— —
Relay RY003 Crank case 2 (CH2)
Relay RY002 Crank case 1 (CH1)
W-2WAY ECO-i SYSTEM
Trouble Diagnosis
Operation
5