MITSUBISHI ELECTRIC P500YMF-C User Manual
Page 100
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1
B
A
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
4) BC controller transformer
Solenoid valves (SVA, SVB, SVC, SVM1)
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.
(SVM1)
SVM is turned on and off in accordance with operation mode.
Note 2 : (SVA, SVB, SVC)
(SVM1)
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
Operation Mode
Cooling-only
Cooling-principal
Heating-only Heating-principal
Defrosting
Stopped
SVM1
ON
OFF
OFF
OFF
ON
OFF