Solenoid Valve Forced Open/Close Function In Outdoor Unit - Toshiba Super MMU-AP0091H 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 opera-
tion on the interface P .C. board in the outdoor unit to using this function, check there is no refrigerant clogging
with ON/OFF operation of the solenoid valve.
[Operation]
1. Set the switch on the interface P .C. board SW01 to [ 2 ], SW02 to [ 1 ], SW03 to [ 3 ].
2. When [H. ] is displayed in 7-segment display [A], keep pushing the switch SW04 for 2 seconds or more.
3. From when [ 2 ] is displayed in 7-segment display [B], SV2 is turned on.
4. After then, ON and OFF of each solenoid valve are exchanged by changing the setup number of the switch
SW02.
(ON/OFF output pattern of each solenoid valve is as 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 kept with the same
number for 5 seconds or more.
NOTE 2) The mark [
NOTE 3) The mark [—] in the table indicates ON/OFF of the solenoid valve is controlled based upon the
specifications of the air conditioner.
NOTE 4) The mark [
this operation.
NOTE 5) The case heater outputs heat air for both compressor and accumulator heaters.
7-segment display
SW02
[B]
1 [ 2
2 [ 5
3 [ 4–
4 [ 3A
5 [ 3b
6 [ 3C
7 [ 3d
8 [ 3E
9 [ 3–
10 to 15 [
16 [ ALL
[Clear]
Return numbers of SW01, SW02, and SW03 on the interface P .C. board to [1/1/1] each.
NOTE) As this function is not based on the specified general control, be sure to release this mode after
operation.
¡
] in the table indicates the corresponding solenoid valve is forcedly turned on.
l
] in the table indicates the corresponding solenoid valve is forcedly turned off with
Operation pattern of solenoid valve
SV2 SV5
¡
] —
¡
] —
] — —
] — —
] — —
] — —
] — —
] — —
] — —
] — —
¡ ¡
]
SV41 SV42 SV3A SV3B SV3C SV3D SV3E
— — — —
— — — —
¡ ¡
— —
¡
— — —
¡
— — —
— — — —
— — — —
— — — —
¡ ¡
— —
— — — —
¡ ¡ ¡ ¡
122
Case heater
output relay
¡
— —
¡
— —
¡
— —
¡
— —
¡
— —
¡ ¡
—
¡ ¡
—
l
— —
¡
— —
¡
— —
¡ ¡ ¡
¡
¡
¡
¡
¡
¡
¡
¡
¡
¡
¡