. UNIT OPERATION
6
Parameter Checking and setting
Please press key M+
▲ for 3 seconds and enter to parameter setting mode as show below.
“01”is parameter code,“78”is parameter values. Other items’ parameters meaning are the same with above
picture showed.
Parameter list:
NO. Name
range/meaning
default status remark
00
power off auto restart
0
：
not restart
；
1
：
Auto restart
1 check/set
01
hot water temp return differential
2~15
℃，
minus return differential 2
℃
check/set
02
air conditioning return differential
2~15
℃，
minus return differential 2
℃
check/set
03
defrost start temp.
-20~5
℃
0
℃
check/set
04
water source anti-freeze temp.
-20~5
℃
2
℃
check/set
05
antifreeze exist temp.
-5
℃
～
5
℃
5
℃
check/set
06
defrost exist temp.
10~35
℃
30
℃
check/set
08
Interval between 2 defrosts
15~99 mins
35
check/set
09
ambient temp of DHW backup
electrical heater start
-20~20
℃
0
℃
check/set
10
ambient temp of AC backup
electrical heater start
-20~20
℃
0
℃
check/set
11 reserved
12
Exhaust gas protection temp.
100~129
℃
/2
57 check/set
13 reserved
14 function
parameter
0
：
G3 is seasonal switch valve
；
1
：
G3 is solar pre-heat valve
；
0 check/set
19
adjust fixed running rate
0~100 HZ
50HZ
check/set
20
Run set rate
1
：
practical running
；
0
：
manual rate running
1
check/set
Note
：
Usage of 14. Function parameter: (As per solar application 1)
when this parameter is 1, when air conditioning heating run, it will compare solar water tank temp with air conditioning returned
water temp, when solar water tank temp is 5 or more degree higher than air conditioning returned temp, the 3-way valve G3
electricity supply will be on; when solar water tank temp - air conditioning returned temp is less than 2 centigrade, G3 electricity
supply will be off. This function is to use solar to preheat for room heating and DHW tank water.
When this parameter is 0, G3 is seasonal switch valve, when the heat pump is working for heating, G3 is on, when heat pump is
working for cooling, G3 is off.
Normally use one 3-way valve with 3 wires. 2 wires are always connected with electricity supply and 1 signal wire is connected
with heat pump G3 terminal port to enable function.
7
