Hisense HZX-4.0AEC Operation Installation Maintenance Manual page 32

6 .4.3 Cooling or H eating Operation Mode Setting
By utilizing this function, the cooling or heating operation mode can be changed by giving a contact signal
from the outside to the unit. The operation mode is followed by the field-supplied switch or the remote
control switch, which is used last.
(In Case of "Cooling or Heating Operation Mode Setting Change by External Input" Signal Input to
Terminal board 
COM
Control by R.C.S (Heat)
Control by R.C.S (Cool)
Operation Mode of Unit Heat
NOTES:
1. This function can not be used together with the following functions; "Remote Control ON/OFF Function 2",
and "Cancellation of Commands from Remote Control Switch after Forced Stoppage".
2. Remote Control Switch is required for this function.
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Wiring Diagram Example
Heat
Signal to
Cool
Cool
(Setting indication 07)
HEAT
X1
Time Chart
COOL
Power
Source
X1
Control Circuit
)