Toshiba MAR-C104M8-1-PE Service Manual page 54

10.4 Outdoor unit – Valve operation.
For the 2-Pipe MAR-M104HTM8-1-PE only cooling operation, heating operation and valve 20SF are applicable.
Outdoor Operation Mode
Cooling operation
Heating operation
Simultaneous
cooling-dominant
operation
Simultaneous
heating-dominant
operation
10.5 Manual operation of valves.
Note: 1. Ensure that the system is OFF before valves are manually operated.
2. Valves will re-assume their required position unless electrically isolated.
a. Multi controller
Display switch
position
PMV A
0
PMV B
1
PMV C
2
PMV D
3
b. Outdoor unit – (3-Pipe ONLY)
Short Point
SW1 SW2
0
1
N/A
0
1
2 0
Outdoor main heat
exchanger
Sub heat exchanger
–
Outdoor main heat
exchanger
Sub heat exchanger
Expansion valve
Capillary
Valve
Selected valve is fully opened for 2
minutes.
TP1
Valves will automatically assume
their required position after two
TP2
TP3
20SF SV15 SV13 SV14 SV16
OFF OFF ON
ON ON ON
ON OFF OFF
OFF OFF OFF
ON ON OFF
ON OFF OFF
ON OFF OFF
Short point
TP 1
Operation
minutes.
Push SW04
Press SW03
57
OFF OFF
OFF OFF
ON OFF
Opening degree
OFF OFF
control
Opening degree
OFF OFF
control
ON OFF
OFF ON
TP 2
Selected valve is fully closed for 2
minutes.
Function
PMV 1 fully open for 2 minutes.
PMV 2 fully open for 2 minutes.
PMV 1 fully closed for 2 minutes.
PMV 2 fully closed for 2 minutes.
Solenoid valves manually energised
in sequence when pressed
Solenoid valves automatically
energised in sequence
(1 second intervals)
PMV2
–
–
–
–
–