ES AWH11-V5+, User Manual

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3. Usage
50
An external Close/Open signal from other control devices can be connected to the ES and GND port shown on the below
picture on indoor PCB, to switch ON/OFF the working of complete heat pump unit, if this parameter is set to 1:
When the input external signal is "close" type, unit works
;
When the input external signal is "open" type, unit stops.
Meaning Range Default Value
Parameter No.
1
0
0 (invalid), 1(valid)
External ON OFF Switch
For example, when the parameter 0=1, the unit
works in testing mode. If port ES and GND are
short-connected, the relay EVW output 230V,
and the LED lamp near the relay will light.
Meaning Range Default Value
Parameter No.
0 (invalid), 1 - 60 (checking
time, in seconds)
2 60
Water Flow Switch
This parameter is used to set whether the system has a water flow switch or not, and if yes, how many seconds after unit
circulation pump starts, unit starts to check the statue of the water flow switch.
If it is set to "0", unit will not check the statue of the flow switch.
If it is set to any value except "0", unit starts to check the statue of flow switch after unit circulation pump starts for this
set time. If flow switch is in "open" statue at this time, unit will show failure code 00 P7, which means "not enough water
flow rate".
Note:
If unit circulation pump is OFF, flow switch should in "open" statue as there should has no flow in the system. If
not, unit will take it as the failure of flow switch itself, and give out correspondent failure code 00 Eb.
Parameter No.
Meaning Range
Default Value
Heating Buffer Tank
3
0 0(no), 1(yes)
This parameter is used to set whether the system has a buffer tank for heating operation. It is more related to the control
of "circulation pump for heating system".
If there has no buffer tank included in the heating system, circulation pump for heating system
”
will work only when the
unit works in heating mode. And the circulation pump works for 1 minute after stops for every 6 minutes to read the
temperature in the distribution system.
If there has a buffer tank included in the heating system, "circulation pump for heating system" will work whenever the
unit has the demand for heating operation.
ES HS CS
HW SH
CS
HS ES
HW
SH