Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 156

[5-3 HBC Control ]
5-3-4 Valve Block (VB3) Water Flow Path Switching Control
The following table shows the control pattern of the valve block in different operation modes to switch the water flow.
(1) Cooling-only Thermo-ON, Cooling-only Thermo-OFF, Cooling-only test run, Heating-only Ther-
mo ON, and Heating-only Thermo OFF
Outdoor unit operation mode
Cooling-only Thermo-ON
Heating-only Thermo ON
Cooling-only Thermo-OFF
Heating-only Thermo OFF
Cooling-only test run
(2) Heating-main Thermo-ON, Heating-main Thermo-OFF, Cooling-main Thermo-ON, and Cooling-
main Thermo-OFF
Outdoor unit operation mode
Heating-main Thermo-ON
Cooling-main Thermo-ON
Heating-main Thermo-OFF
Cooling-main Thermo-OFF
<Designated degree of valve opening>
- 1: 800 pulse
- 2: 85~700 pulses
- 3: 900~1600 pulses
BS_05_M
Connected indoor unit VB3 command value
operation mode
Stop
Fan
Thermo-ON
Thermo-OFF
Stop
Fan
Thermo-OFF
Stop
Fan
Thermo-ON
Thermo-OFF
Connected indoor unit VB3 command value
operation mode
Stop
Fan
Cooling Thermo-ON
Cooling Thermo-OFF
Heating Thermo-ON
Heating Thermo-OFF
Stop
Fan
Cooling Thermo-OFF
Heating Thermo-OFF
for opening
1
1
2 or 3
1
1
1
1
1
1
2 or 3
1
for opening
1
1
2
1
3
1
1
1
1
1
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chapter 5 -