Solenoid Valve Forced Open / Close Function In Outdoor Unit - Toshiba MCY-MHP0305HT-C Service Manual

8-7-7. Solenoid valve forced open / close function in outdoor unit

This function is provided to forcedly open each solenoid valve mounted in the outdoor unit by the switch operation
on the interface P.C. board in the outdoor unit. Use this function to check there is no refrigerant clogging with ON
/ OFF operation of the solenoid valve.
[Operation]
(1) Set the switches SW01 / SW02 / SW03 on the interface P.C. board of the outdoor unit to [2/1/3].
(2) When [H. r.] is displayed in 7-segment display [A], keep pressing the switch SW04 for 2 seconds or more.
(3) [ 2 ] is displayed in 7-segment display [B] and SV2 ON.
(4) After then, ON and OFF of solenoid valve are exchanged by changing the setup number of the switch
SW02.
(ON / OFF output pattern of each solenoid valve is as shown below.)
NOTE 1) Display in 7-segment display [B] is exchanged just when the number of SW02 has been changed; on the
other hand, the solenoid valve output is exchanged when SW02 has been kept with the same number for
5 seconds or more.
NOTE 2) The mark [O] in the table indicates that the corresponding solenoid valve is forcedly turned on.
NOTE 3) The mark [-] in the table indicates that ON / OFF of the solenoid valve is controlled based upon the
specifications of the air conditioner.
NOTE 4) The mark [×] in the table indicates that the corresponding solenoid valve is forcedly turned off with this
operation.
7-segment display
SW02
[B]
1 [ 2 ]
2 [ 4 ]
15 [ oFF ]
[ ALL ]
1 6
[Clear]
Return switches SW01 / SW02 / SW03 on the interface P.C. board to [1/1/1].
NOTE) As this function is not based on the specified general control, be sure to release this mode after checking.
Operation pattern of solenoid valve
SV2 SV4
O -
- O
O O
80
103