Outdoor Unit Electronic Control Valves [Mov1, Mov2, Mov3, Mov4] - Sanyo ECO-i 3-WAY MULTI SYSTEM Service Manual

7. Outdoor Unit Electronic Control Valves
[MOV1, MOV2, MOV3, MOV4]
7-1. Types of Electronic Control Valves
[SPW-C0705DZH8, C0905DZH8, C1155DZH8, C1305DZH8, C1405DZH8]
Capacity
Electronic
control valve 1
Electronic
control valve 2
Electronic
control valve
Electronic
control valve 3
Electronic
control valve 4
7-2. Power Initialization
If no indoor units have started (even once) after the power was turned ON, the outdoor unit electronic control valve
operates at 480 pulses.
7-3. Heat Exchanger Controlled by Each Electronic Control Valve
The configuration of the heat exchangers is different depending on the capacity of the outdoor unit. MOV3 is not
present in types 1155 and below.
Heat exchanger 2
Front
Operation of electronic control valves during normal unit operation
All indoor units in Cooling mode
All indoor units in Heating mode
Outdoor heat
Mixed
exchanger condenser
heating/
cooling
Outdoor heat
operation
exchanger evaporator
●
When all indoor units are operating in Cooling mode or Heating mode, all outdoor unit heat exchangers are used
if even one of the compressors in that outdoor unit is operating.
●
During mixed heating/cooling operation, the number of heat exchangers used varies according to the conditions
of the indoor units. However, heat exchanger 1 at the outdoor unit which contains the inverter compressor with
the lowest amount of operating time is always used.
●
SH control controls the difference between the liquid temperature and gas temperature to 1 ~ 5°C.
●
During heating mode SH operation, refrigerant may not flow to the heat exchanger.
0705
Heat exchanger Heat exchanger
1 valve 1 valve
Heat exchanger Heat exchanger
2 valve 2 valve
None
For SC circuit For SC circuit
Types 0705, 0905, 1155
Heat exchanger
status
Condensor
Stopped
Evaporator 45~480
Stopped
Condensor 50~480
Stopped
Evaporator 45~480
Stopped
0905 1155
Heat exchanger
1 valve
Heat exchanger
2 valve
None None
For SC circuit
Heat exchanger 3
Heat
exchanger 1
Front
Types 1305, 1405
MOV1 MOV2 MOV3
480 480 480
0 0 0
15~480 15~480
0 0 0
50~480 480
0 0 0
15~480 15~480
0 0 0
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3-WAY ECO-i SYSTEM
Control Functions
1305 1405
Heat exchanger Heat exchanger
1 valve 1 valve
Heat exchanger Heat exchanger
2 valve 2 valve
Heat exchanger Heat exchanger
3 valve 3 valve
For SC circuit For SC circuit
Heat exchanger 1
Heat exchanger 2
Remarks
Maximum fl ow control
Refrigerant shut-off
SH control
Refrigerant shut-off
Heat exchanger capacity control
Refrigerant shut-off
SH control
Refrigerant shut-off
1