Mitsubishi Electric PURY-P200 Service Handbook page 103

12. BC controller control (CMB-P
(1) SV A, SV B, SV
SV A, SV B, SV
Mode
Pipe
end connection
SV A
SV B
SV C
(2) SVM1 control
SVM comes on and off depending on the operation mode.
Operation mode
SVM1
✻2: The pressure difference (PS1, P3) is controlled every minute to stay constant.
(3) LEV control
The opening of LEV
Operation mode
LEV1
LEV2
Type
Type GA only
G, GA
LEV3
Type
LEV3a
GB
✻1: Superheat control
(G,GA:TH12,TH15, GB:TH22,TH25) is controlled every minute to stay constant.
✻2: The pressure difference (PS1, P3) is controlled every minute to stay constant.
✻3: The liquid level detected on the bases of liquid inlet temperature (TH11) is controlled every minute to stay constant.
✻4: It may exceed 110 due to a pressure rise on the liquid side (PS1).
(4) SVM2 control (Type GA only)
Operation mode
SVM2
G, CMB-P
C control
C comes on and off depending on the mode at the pipe end connection.
Cooling Heating
ON OFF
OFF
ON OFF
Cooling only Cooling main
Pressure difference
ON
control ✻2
(sj) is controlled based on the operation mode.
Cooling only Heating only
2000 110
Superheat Pressure difference
control ✻1 control ✻2
Superheat
60
control ✻1
- Every minute, the amount of superheat calculated on the bases of bypass outlet/inlet temperature
Cooling only Cooling main
OFF OFF
- 100 -
GA, CMB-P GB)
Stop
OFF
ON OFF
OFF
Heating only Heating main
OFF OFF
Cooling main Heating main
Liquid-level
110
control ✻4
✻3
Pressure difference
control ✻2
Pressure difference
control ✻2
Superheat
60
control ✻1
Heating only Heating main
Pressure difference Pressure difference
control ✻2 control ✻2
Defrost
OFF
OFF
OFF
Defrost Stop
ON OFF
Defrost Stop
2000 1200
G:1000
600
G:2000
60 60
Defrost Stop
OFF OFF