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If you want to set parameters then need Combine with "M”.
Reset operation:
In the shutdown, press and hold the " " "M" button for 10 seconds to restore the default value of the
parameter.
5.4 Parameter setting table and Fault code:
Short press "M" to query the status parameters of the unit
Parameter Meaning Range Default value Remarks
A Inlet/Return Water Temp. -19
～
99
℃
b Coil Temp. -19
～
99
℃
c Ambient Temp. -19
～
99
℃
d Exhaust gas Temp.
0
～
120
℃
E Return Water Temp. Setting value in
Heating mode
15
℃～
40
℃
27
℃
Adjustable
F Defrosting period 10
～
80Min 40 Min Adjustable
G Exits defrost time 5
～
30Min 8 Min Adjustable
H Return Water Temp. Setting value in
cooling mode 8
℃～
28
℃
27
℃
Adjustable
J Temp. Difference to Restart heat
pump 1
℃～
10
℃
2
℃
Adjustable
L With/Without Brown-out Protection 0
～
1 1 Adjustable
O Anti-freeze protection value of
Ambient Temp. -10
℃～
15
℃
-5
℃
Adjustable
P Coil Temp. to entering defrosting
-19
℃～
0
℃
-1
℃
Adjustable
t Coil Temp. To Quit Defrosting
1
℃～
30
℃
20
℃
Adjustable
U Exhaust Temp. protection value 80~120
℃
110
℃
Adjustable
5.5 Fault code
Protection / Error Code
Inlet water temperature sensor failure P1
Coil Pipe sensor failure P2
Ambient temperature sensor failure P3
Ambient temperature too low E4
Exhaust gas temperature sensor failure P4