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7. Test Pin
2WAY SYSTEM
Trouble Diagnosis
6
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 (CN048, white), then turn the power back ON.
Output is performed in the sequence shown in the table below, for 0.5 seconds each.
The asterisk (*) mark stands for the series of “3Way”.
Operation
Operation
Output
1
Relay RY012 Supercooling valve 1 (SCV1)
11 Relay RY008 Save valve (SAVE)
Output
2
Relay RY013 Supercooling valve 2 (SCV2) *
*
*
*
*
*
*
*
12 Relay RY019 Pressure balance valve 2 (PBV2)
3
Relay RY016 Discharge valve 2 (DCV2)
13 Relay RY002 Crankcase 2 (CH2)
4
Relay RY015 Discharge valve 1 (DCV1)
14 Relay RY001 Crankcase 1 (CH1)
5
Relay RY014 Bypass valve (BPV)
15 Relay RY014 Supercooling valve 3 (SCV3)
6
Relay RY006 Recovery valve (ORVR)
16 Relay RY017 Discharge valve 3 (DCV3)
7
Relay RY005 Balance valve (BALV)
17 Relay RY020 Pressure balance valve 3 (PBV3)
8
Relay RY018 Pressure balance valve 1 (PBV1)
18 Relay RY003 Crankcase 3 (CH3)
9
Relay RY011 Refrigerant balance valve (RBV)
10 Relay RY010 Refrigerant adjustment valve (RCV)
SM830186-00̲2WAY ECO-i.indb 31
SM830186-00̲2WAY ECO-i.indb 31
2010/12/25 8:47:28
2010/12/25 8:47:28
