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2.4.3 Defrosting Process
If it is detected the defoeting is required,and if the compressor running frequency is a little higher,the frequency will first
reduced to some level and then the compressor and indoor fan stop,50s later,outdoor fan stops meanwhile,4-way valve
stops after 45-second delay.The compressor will restart with 90Hz of running frequency in 55s to defrost.Upon defrsoting
is completed,compressor running frequency will decrease to 60Hz, and 4-way valve and outdoor fan will start,10s later,
compressor will run with increased frequency required by capacity.Indoor fan will run in 2 min at most.
If compressor is stopped for malfunction in heating mode,the indoor fan will run by blowing exhaust heat.
3 Current Protection Function in Cooling/Heating/Dehumidifying/Auto Mode
3.1 Overload pretection
When Ttube is detected too high, the compressor will run in limited or dropped frequency.When Ttube goes on rising over the stated value,
the compressor will stop.If Ttube resumes normal, so does the complete unit according to capacity requirements.
If 6 successive times ofoverload protection happens,the compressor won't resume running except pressing ON/OFFbutton.
In running process,if the comprssor has runfor 7 min,the times of overload protection will be cleared.
3.2 Delay pretection for compressor
Once be stopped, the compressor can not be restarted within 3mins.
3.3 Exhaust Temperature Pretection
If it is detected by the outdoor controller that the exhaust temperature is too high, the compressor will run in limited or dropped frequency.
If the exhaust temperature goes on rising over the stated value, the compressor will stop and it is detected that the exhaust temperature
has resumed normal, the compressor will resume running according to capacity requirements.
If 6 successive times ofoverload protection happens,the compressor won't resume running except pressing ON/OFFbutton.
In running process,if the comprssor has runfor 7 min,the times of overload protection will be cleared.
3.4 Current Protection Function
1.Overload protection
If total current is detected over the stated value, the unit will be stopped as the indoor room temperature meet the preset
value,after the compressor has stopped for 3 minutes, it will resume its original operating status automatically.
If 6 successive times ofoverload protection happens,the compressor won't resume running except pressing ON/OFFbutton.
In running process,if the comprssor has runfor 7 min,the times of overload protection will be cleared.
2.Current dropped frequency or limited frequency control:
The controller will drop the compressor frequency or prohibit the compressor frequency rising according to the change of total current.
3.5 Communication Malfunction
There is communication malfunction if it can not receiving correct signal for 3 minutes continuously, in which case, the outdoor
unit will stop.
3.6 Module Protection
When module is in protection, the compressor will be stopped as the indoor room temperature meet the preset value, after the
compressor has stopped for 3 minutes, it will resume its original operating status automatically.
If 6 successive times ofoverload protection happens,the compressor won't resume running except pressing ON/OFFbutton.
In running process,if the comprssor has runfor 7 min,the times of overload protection will be cleared.
3.7 Overheat Protection of Module
If it is detected the IPM temperature is too high, the compressor will run in limited or dropped frequency.If the IPM temperature goes on
rising over the stated value, the compressor will stop .When the IPM temperature resumes normal, and the compressor has stopped
for 3 min., the complete unit will resume running.
If 3 successive times of IPM protection in an hourhappens,the compressor won't resume running except pressing ON/OFFbutton.
3.8 OverloadProtection for compressor
If compressor oveload is detected,the indoor unit will stop as the indoor room temperature meet the preset value.If the
compressor has stopped for 3 min. ,it should be reset to start.
3.9 9 PFC Protection
If start the unit in cooling,heating and dehumidifying mode,the compressor will operate in the frequency of 30Hz,and then
PFC occurs after 30s.
At any time of stopping compressor,PFC will stop with the compressor at the same time.
Once PFC starts,protection signal will be detected soon.During PFC protection,PFC stops with the compressor at the
same time.
PFC will resume operation automatically after 3min when malfunction happens to it.
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