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7-7-7. 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) 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 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.
NOTE 5) The case heater output is for both the compressor and accumulator heaters.
7-segment
SW02
display [B]
SV2
1
[ 2 ]
2
[ 5 ]
3
[ 41 ]
4
[ 42 ]
5
[ 43 ]
6
[ 3A ]
7
[ 3b ]
8
[ 3C ]
9
[ 3d ]
10
[ 3– ]
11
[ 61 ]
12~15
16
ALL
* If the outdoor unit has no valve, then 7-segment display [B] shows [ – – ].
[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
SV5
SV41 SV42 SV43 SV3A SV3B SV3C SV3D SV3E SV3F SV61
O
-
-
-
-
O
-
-
-
-
O
-
-
-
-
O
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
O
O
O
O
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
O
-
-
-
-
O
-
-
-
-
O
-
-
-
-
O
-
-
-
-
-
O
O
O
-
-
-
-
-
-
-
-
O
O
O
O
– 153 –
-
O
-
-
-
O
-
-
-
O
-
-
-
O
-
-
-
O
-
-
-
O
-
-
-
O
-
-
O
O
-
O
O
-
O
-
-
O
-
O
-
O
-
-
O
O
O
O
Case heater
output relay
O
O
O
O
O
O
O
O
O
O
O
O
O
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Troubleshooting
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