Samsung ASHM070VE Service Manual page 13

C) The load delay time has the error of ±9
sec according to the communication
delay time.
4 . B room 4 way valve contro l
When changing over the heating to cooling
in case of B and C room, the 4 way valve is
immediately changed over.
3-2-4 Pulse operated expansion valve control
1 . To use the fixed step under each condition
of operation
2 . The step of dry mode is same as that of
cooling operation.
3 . Maintain the current operation step during
the protection contro l .
4 . If B/C is under the cooling / dry mode, the
step is 136+α/136. (α= 32 step).
5 . When the operation is off, the step is
144/144 step (for balancing the pre s s u re ) .
Samsung Electronics
Operating Instructions and Installation
6 . The initial positioning of pulse operated
expansion valve is performed when any one
room is on while 3 rooms are off .
7 . For initial positioning, close the 512 step
and move it to setting step.
8 . When one of pulse operated expansion
valve B and C completes its initial
positioning, the other one starts the initial
p o s i t i o n i n g .
3-2-5 Bypass valve control
1 . When one room is under the comp on
condition between the B/C , the valve is on.
2 . When both rooms are under the comp on
condition between the B/C , the valve is off .
3 . When B comp is under the defrost opera-
tion, it shall be in accordance with 1) and 2).
4 . When B room is under heating condition, it
is always off .
5 . When the bypass valve is off, it is off after
the positioning completion of pulse operat-
ed expansion valve.
3-5