Mitsubishi Electric CITY MULTI P500YMF-C, Руководство по обслуживанию

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–98–
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