Main Functions And Control Specification Of Outdoor Unit; Outdoor Unit Operation Frequency And Control - Haier HSU12 Service Manual

5.2 Main functions and control specification of outdoor unit

Sensor Code Definition: Tai= Indoor Ambient Temperature, Tao=Outdoor Ambient Temperature,
Tc1=Indoor Coil, Td= Air Discharge, Te= Outdoor Coil, Ts=Air Intake

5.2.1 Outdoor Unit Operation Frequency and Control

Compressor Operation Frequency Range:
Outdoor Temperature
Heating Hz
Defrosting Hz
Outdoor Temperature
Cooling Hz
Regardless of target frequency of indoor unit, each time when compressor is from off to on, it
must maintain 60Hz,90Hz for one minute (Frequency will be immediately decreased under the
condition that outdoor unit air discharge temperature overheating protection is activated or over
current of compressor) then the compressor will operate towards target frequency. This process
does not exist in normal operation of unit.
When completing compressor startup operation, it will operate as per frequency of indoor unit.
After 2 minutes, compressor operation frequency will be compensated as per relevant conditions.
When completing compressor startup operation, it will operate as per frequency of indoor unit.
After 2 minutes, compressor operation frequency will be compensated as per relevant conditions.
Rapid Frequency Increase/Decrease Speed 1 ----------1Hz/s
Slow Frequency Increase/Decrease Speed 2 -----------1Hz/10s
HSU12/18VHJ(DB)
4
20 110
23
20 50
5
4 18
20 90
80
23 32
20 70
Domestic Air Conditioner
18
20 53
32
20 95