If there are 6 continuous times of protection, compressor will stop and can not restart by itself
and send signal of error to indoor unit. It can only be restart by pressing “ON/OFF” button. In
operation if operating time of compressor is over 7 minutes, the number of times will be zero
cleared.
(2) frequency demultiplying, limitation of current control
If current of whole unit is high, frequency of compressor will be demultiplied or limited. If normal
current value is detected, whole unit restore to operate normally.
6.1.3.5 Communication failure
When there is no right signal from indoor unit for continuous 3 minutes or no right signal from
driving slug within 60s, communication failure happens. Outdoor unit will closes down.
6.1.3.6 Module protection
Compressor will detect signal of module protection right away after it starts. Compressor closes
down in module protection status as if room temperature reaches the set value. And relevant error is
displayed. Compressor restores to run after stopping for 3 minutes.
If there are 6 continuous times of protection, compressor will stop and can not restart by itself. It
can only be restart by pressing “ON/OFF” button. In operation if operating time of compressor is
over 7 minutes, the number of times will be zero
6.1.3.7 overheating protection of module
When IPM temperature is too high, frequency of compressor will be demultiplied or limited. Wen
IPM temperature is beyond maximum, compressor closes down. The whole unit can only restart
when IPM temperature returns to norm and compressor has been stopping for 3 minutes.
If 3 times of IPM temperature protection happens in 1 hour, compressor will stop and can not
restart by itself. It can only be restart by pressing “ON/OFF” button.
6.1.3.8 overloading protection of compressor
When overloading switch of compressor operates, it will closes down as if room temperature
reaches set value. Whole unit can only restart when compressor has been stopping for 3 minutes
and overload switch resets.
6.1.3.9 PFC protection
When air conditioner starts in cooling, heating or dehumidifying mode, compressor starts and
frequency rises to 30hz. PFC protection is on after it runs for 30s.
Compressor closes down in whatever condition, PFC and compressor closes down at the same
time.
PFC protection signal will be detected once after PFC starts; when PFC protection is on, PFC and
compressor closes down at the same time.
PFC restores automatically 3 minutes later after failure happens
6.1.3.10 Testing of malfunction of temp. sensor and IPM overheating
(1) In stand-by status outdoor tube temperature sensor, ambient temperature sensor and sensing
device error of overheating IPM are not under detection.
(2) error of temp. sensor of exhausting gas and error of IPM overheating will be under detection after
the whole unit is on and compressor operates for continuous 3 minutes.
(3) within 10 minutes after compressor starts or within 10 minutes after defrosting or oil returning in
heating mode, error of outdoor tube temp. sensor are not under detection.
(4) when error of IPM overheating or failure of temp. sensor is detected, whole unit will closes down
immediately.
-12-
