Heat Source Unit Heat Exchanger Capacity Control Patterns - Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook

[ VII Control ]

(2) Heat source unit heat exchanger capacity control patterns

Model
P72-P120 models
HWE09080
Operation
Operation mode
pattern
Cooling 1
2
3
4
5
6
7
8
Heating 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Solenoid valve
SV4a SV4b SV4d
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON ON OFF
ON ON OFF
ON ON OFF
ON ON OFF
ON OFF
ON OFF
ON OFF
ON OFF
ON ON
ON ON
ON ON
ON ON
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON ON OFF
ON ON OFF
ON ON OFF
ON ON OFF
- 147 -
SV7a SV7b
ON ON
OFF ON
ON OFF
OFF OFF
ON ON
OFF ON
ON OFF
OFF OFF
ON ON ON
ON OFF ON
ON ON OFF
ON OFF OFF
ON ON ON
ON OFF ON
ON ON OFF
ON OFF OFF
ON ON
OFF ON
ON OFF
ON ON
OFF ON
ON OFF
OFF OFF
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