Haier J Series Service Manual page 20

When the outdoor unit is shut down, the valve is opened completely for 2 minutes, and then
begin initialization.
The scope of refrigerationg valve
The scope of heating valve
The valves are adjusted according to the degree of superheat
7.1.2 Four way control
For the details of defrosting four-way valve control, see the defrosting process.
Four way working in other ways:
Under the mode of heating, open the four-way valve, when the compressor is not started or
changed to non-heating mode, make sure the compressor is stoped for 2 minutes, and then
close the four-way valve.
7.1.3 Protection function
7.1.3.1 TTC high temperature-preventing
Once the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing
sensor malfunction must alarmafter10minutes during which the compressor is started (during the
course of self-detection, there's no such limitation)
TTC
TTC>=116
more than 3 minutes
TTC< 92℃
If there are three failures in three minutes,
TC high temperature-preventing control of the indoor heating unit
7.1.3.2
Tpg_indoor is the highest value of the effective indoor unit (start it and it is in accord with the
running state).
The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the
temperature is higher than 54 , decrease the rotate speed of the compressor and do the high
temperature-preventing protection of the indoor heat exchanger; if the temperature of the indoor
heat exchanger is lower than 44 , recover to the normal control.
lasts for 20 seconds. Overheating protection of air-blowing,
Compressor start to restore normal control
90-----480 steps
70-----480 steps
protection
abnormal stop
Electric control contact (normal operation)
alarm malfunction to the indoor, others don't last.
18
Functions and control
SHa SHa.
Maintain current frequency
compressor stops for
Domestic air conditioner