–112–
1
B
A
Solenoid valves (SVA, SVB, SVC, SVM)
Coordination signals output from the board and solenoid valve operations. *SVM is not built in depending on models.
Note 1 : (SVA, SVB, SVC)
SVA, SVB and SVC are turned on and off in accordance with operation mode.
(SVM)
SVM is turned on and off in accordance with operation mode.
Operation Mode
Cooling-only
Cooling-principal
Heating-only Heating-principal
Defrosting
Stopped
SVM
ON
OFF
OFF
OFF
ON
OFF
Note 2 : (SVA, SVB, SVC)
(SVM)
Measure temperature of piping on either side of SVA
1
-
A
Measure temperature at points marked “X”.
Measure temperature of piping on either side of SVB
1
-
B
4) BC controller transformer
Cooling
Heating
Stopped
Defrosting
SVA
ON
OFF
OFF
OFF
SVB
OFF
ON
OFF
OFF
SVC
ON
OFF
OFF
OFF
Mode
Branch port
Normal
Malfunction
CNTR(1)-(3)
Approximately 90
Ω
Open or shorted
CN03(1)-(3)
Approximately 1.7
Ω
* Disconnect the connector before measurement.
CNTR
CN03
BC Controller control board
Red
Blue
Brown
Brown
CMB-P-V-E
