Pulse Motor Valve (Pmv) Forced Open/Close Function And Solenoid Valve; Forced On Function In Outdoor Unit - Toshiba MMY-MUP0961HT6P-UL Service Manual

7-7-6. Pulse Motor Valve (PMV) Forced Open/Close Function and Solenoid valve Forced ON
Function in Outdoor Unit
The solenoid valves provided to outdoor units can be forced ON (open) by switching operations at the interface
P.C. board of the outdoor unit.
Also, the pulse motor valves (PMV1, PMV2, PMV3, PMV4) of the outdoor unit can be forced to full-open, half
open, and full-closed for two minutes.
Use this function to check for valve or PMV malfunctioning, clogging, and so forth.
[Control start method]
(1) Set the rotary switches [SW01/SW02/SW03] on the interface P.C. board of the outdoor unit to [2/1/3].
When [H.r ] is displayed, push the push-switch [SW04] for one second or longer, which changes the
display to [H. r – – –], and this control is started.
[Method to switch solenoid valve/PMV display]
Solenoid valve display is made immediately after starting control.
(1)
The 7-segment display is [H. r – – –].
Pushing the push-switsh [SW06] switches the display to [P.
(2)
which is PMV display.
Each time the push-switch [SW06] is pushed, the display
changes between solenoid valve display and pulse motor valve
(PMV) display.
[H. r – – –]
Solenoid valve
display
(3) Follow the method below for solenoid valve and PMV operations.
* Take care, as operations of each of the solenoid valve and PMV are
enabled, regardless of which is displayed.
[Method of operating solenoid valve (forced ON)
(1) Set the rotary switch [SW02] to 2, and five seconds later SV41 will come ON. [H.r
the 7-segment display in the solenoid valve display screen.
(2) Any desired solenoid valve can be forced ON by changing the setting No. of the rotary switch [SW02].
The following table shows the forced-ON/normal control patterns for each solenoid valve.
Rotary switch
SW01 SW02
1
2
3
4
2 5
6
7
8 ~ 15
16
[P. ∗ ∗ ∗ ∗]
long push SW06
PMV display
for 1 second
7-segment display
(solenoid valve
display)
SW03
[H.r – – –]
[H.r 4 1 ]
[H.r 4 2 ]
#
[H.r
Used in
[H.r 3 F ]
PMV
[H.r 3 – ]
operations
[H.r 5 B ]
[H.r – – –]
[H.r A L L]
],
Operation patterns of solenoid valve/heater
(✓: Forced ON, – : normal control)
SV41 SV42 SV3D
– –
✓
–
✓
–
3 D ] – –
– –
– –
– –
– –
✓ ✓
- 161 -
Start control /
PMV opening
switching
End control
SW04 SW05
SW01 SW02
Select solenoid valve
41] will be displayed in
Compressor 1, 2
SV3F SV5B
case heater
– – –
– – –
– – –
✓
– –
✓
– –
✓ ✓
–
✓
– –
– – –
✓ ✓ ✓
Solenoid valve /
PMV display
switching
SW06
SW03
Select PMV
✓
✓
✓
✓
✓
✓
✓
✓
✓