Manual Operation Of Valves - Toshiba HFC R407C Service Manual

Valve and sensor function and operation
Outdoor unit - valve operation
Outdoor operation mode
Cooling operation Outdoor main heat
exchanger
Sub heat exchanger
Heating operation -
Simultaneous Outdoor main heat
cooling-dominant exchanger
operation Sub heat exchanger
Simultaneous Expansion valve
heating-dominant Capillary
operation

Manual operation of valves

Note: 1. Ensure that the system is OFF before valves are manually operated.
2. Valves will reassume their required position unless electrically isolated.
a. Multi Controller
Display switch Valve
position
0 PMV A
1 PMV B
2 PMV C
3 PMV D
b. Outdoor unit
SW1 SW2 Short point
0 N/A TP1
1
0 TP2
1
2 0 TP3
Note:
During Manual/Automatic operation of outdoor valves, SV17 will not be energised. To confirm operation of SV17 operation is as follows: Energised valve
when compressor ON.
Valve operation
20SF SV15 SV13 SV14 SV16 SV17 PMV2
OFF OFF
ON ON
ON OFF
OFF OFF
ON ON
ON OFF
ON OFF
Short point
TP 1
Selected valve is fully opened for 2
minutes.
Operation
Valves will automatically assume
their required position after 2
minutes.
Push SW04
Press SW03
ON OFF OFF ON
ON OFF OFF ON
OFF ON OFF ON
OFF OFF OFF ON
OFF OFF OFF ON
OFF ON OFF ON
OFF OFF ON 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)
-
-
-
Opening degree
control
Opening degree
control
-
-
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