22
P24
Ambient Temp. to Start
Auxiliary Electric Heater
Reserved
Reserved
P25
Auxiliary Heating
Function in Defrosting Mode
Reserved
Reserved
P26
Low temperature protection value
-20
℃
~0
℃
(-22~32
℉
)
-20
℃（
-4
℉）
Note: In the above table, the actual value of the electronic expansion valve and the air speed
is 10 times of the parameter displayed value. For example, when the P20 defrost expansion
valve opening degree shows 30, the actual value at this time is 300 steps. When P30 fan manual
rotation speed shows 80, the actual value at this time is 800.
When the parameter value is
≤
-20, the display bit is not enough, only the value will be
displayed, and the "-" sign is omitted. If the parameter code 26 is-20, the display will be 2620.
2.3 Trouble shooting
system protection/ error indication
Error code
Error description
Solutions
Er 03
Water flow protection
Check water flow /switch, change the
switch if necessary
Er 04
Winter anti-freezing
Water pump will run automatically for
first grade antifreeze
Er 05
High pressure Protection
Measure the pressure value when heat
pump is heating(cooling), if it’s higher
than
44.0 bar
, it means heat pump has
got really higher pressure protection:
1. Detect EEV step, low pressure and
suction temp;
2. Detect the inlet/outlet water temp,;
3. Maybe there is some air in the
refrigeration system;
