Toshiba R410A Service Manual page 109

8-7-4. Pulse Motor Valve (PMV) Forced Open/Close Function in Indoor Unit
This function is provided to fully open or close forcibly the PMV for 2 minutes in all indoor units, using the switch
operation on the interface P .C. board of the header unit.
This function is also used to open the PMV fully when turning off the power and executing an operation, for
example, vacuuming.
Operation
[Open fully]
Set the switch SW01 on the interface P .C. board of the header unit to [2], SW02 to [3], SW03 to [1] and push
SW04 for 2 seconds or more.
(Display shown on 7-segment display for 2 minutes as follows.) [P ] [ FF]
[Close fully]
Set the switch on the interface P .C. board of the header unit SW01 to [2], SW02 to [3], SW03 to [1] and push
SW05 for 2 seconds or more.
(Display shown on 7-segment display for one minute as follows.) [P ] [ 00]
[Clear]
After 2 minutes (1 minutes for "Close fully") have passed when setup has finished, the PMV automatically
returns to the normal operation.
8-7-5. Pulse Motor Valve (PMV) Forced Open Fully/Close fully Function in
Outdoor Unit
This function is provided to fully open or close fully the P .M.V. (PMV1/PMV2/PMV3) used in the outdoor unit for 2
minutes.
[Open fully]
Short-circuit CN30 on the interface P .C. board
of the header unit.
[Close fully]
Short-circuit CN31 on the interface P .C. board
of the header unit.
[Clear]
After 2 minutes, the opening returns to the
normal operation.
Be sure to remove the short circuit after confir-
mation.
I/F P.C. board
Check connector Check connector
CN30 CN31
[Operating method]
Select one of PMV1 or PMV2 to open. Turn SW12
bit 1 to OFF when handling (PMV1/PMV2), and turn
it to ON when selecting PMV3.
Enlarged diagram of switch position
SW12
Bit 1
109
OFF PMV1, PMV2
ON PMV3