Outdoor Unit Control; Compressor Startup Control; Compressor Output Control - Haier InoSens MRV SI AU032FSEUA Service Manual

16. Outdoor Unit Control

16.1 Compressor startup control

After receiving the outdoor startup instruction, outdoor open SV1 30 seconds and then standby. When startup, the
compressor will keep for 3 min at 45rps (when Ta<40°C) or 3 min at 40rps (when Ta>=40°C). In cooling mode, meet
running 1min & (Td-CT)≥20°C or Ps≤0.1MPa (or max. running time is 3min),quite the startup control;
In heating mode, meet running 1min and & (Td-CT)≥20°C or Ps≤0.1MPa (or max. running time is 3min), quite the
startup control;
During startup, the high pressure protection, high exhaust protection and current protection is priority and the low
exhaust up frequency protection is shielded.

16.2 Compressor output control

Compressor Pd/Ps control, control the compressor frequency to output appropriate cooling/heating capacity.
The control at the end of the startup control.
16.2.1 In cooling mode:
According to the ambient temperature select target Ps automatically
Effect priority mode
Mode
Target Ps Setting value -R°C
Target Ps (set by dip
switch)
Target Ps Setting value +2°C
R value setting: Ta<-5°C, Target Ps: setting value -8°C
-5°C≤Ta<12°C, Target Ps is the slope value of setting value and (setting value -8°C)
16.2.2 In heating mode:
According to the piping length to select target Pd and also according to the ambient temperature select target Pd
automatically
Effect priority mode
Mode
Target Pd Setting value +3°C
Target Pd Setting value +2°C
Target Pd
(set by dip switch)
Target Pd
Energy-saving mode
(default)
Setting value -R°C
0
Setting value +2°C
Energy-saving mode
(default)
Setting value +3°C
Setting value +2°C
48
Setting value -2°C Setting value -2°C
Outdoor ambient
temperature
Ta≤12°C
2 12°C<Ta<40°C
Ta≥40°C
Outdoor ambient
temperature
Ta≥15°C
Ta≥7°C
46 Ta≥-5°C
Ta<-5°C
54
Ps correction
during running
During running:
correct the Ps
according to the
compression ratio
Pd correction during
running
During running:
correct the Pd
according to the
compression ratio