Gree Fengyun Series Manual page 39

6.1.4 Protection
6.1.4.1 Antifreeze Protection
If it is detected that the system is under antifreeze protection under cooling mode, the compressor and outdoor fan
will be stopped, the indoor fan and the swing motor will maintain its original operating status.. When antifreeze protection
is released and the compressor has stopped for 3 minutes, the controller will run at the preset mode. It don't shielded the
key signal during antifreeze protection.
6.1.4.2 Anti High-temp Protection
Undre heating mode, if it is detected that the pipe temp. of evaporator is too high, the outdoor fan will be stopped;
when the pipe temp. resumes normal, the outdoor fan will resume running.
6.1.4.3 System high-pressure protection
If high-pressure protection is detected ,all loads will be turned off,all key-press and remote control signals will be shielded, and the
Run Indicator will blink. When compressor is detected free of high-pressure protection, the shield function will be released, the Run
Indicator will keep blinking.To restore the operation, it is required to press ON/OFF key to switch off the unit and indicator before
pressing ON/OFF key again.
6.1.4.4 System low-pressure protection
1. After compressor has started for several minutes and started to check the low-pressure switch signal, if it has detected that the
low-pressure switch opened, that the whole unit will stop, the running indicator will blink,after 3mins and low pressure resumed, the
unit will back to run; if there are twice low-pressure protection continuously act, that the running indicator blink and will not
resume automatically, in order to remind the user there is air leakage; Only if the low pressure resumed, then press ON/
OFF button to turn off the unit, then repress ON/OFF button to resume to run;(if cooling only unit has no low-pressure switch,
connect the circuit directly.)
2. When turn to the manual switch to TEST position, it will carry out the test running, and shield the low-pressure protection;
3. When compressor stops, if it detected for 30s continuously that the low-pressure switch is opened, the whole unit will stop,the
running indicator will blink,and it can not resume automatically, it need to press ON/OFF button to turn off the unit, then repress
ON/OFF button to resume to run.
6.1.4.5 Overcurrent protection
When the compressor is turned on, if it has detected that the current exceed the stated value, the unit will stop as the indoor ambient
temp. has arrived at the setting temp., after the compressor has stopped for 3mins, it will resume to run in the original running state,
if the protections is more than 6 times (If compressor has continuously work more than 6mins, the protection times will reset),
the running indicator will blink, it can not resume to run automatically, it is need to press ON/OFF button to turn off the unit,
then repress ON/OF button to resume to work.
6.1.4.6 Communication malfunction
When it is detected that the indoor and outdoor units have communication malfunction , the running indicator will blink,
the unit will be stopped as the indoor ambient temperature has arrived the setting temperature .
6.1.4.7 Indicator display
S ta te
H ig h -p re s s u re p ro te ctio n
L o w -p re s s u re p ro te ctio n
Ove r cu rre n t p ro te ctio n
C o m m u n ica tio n m a lfu n ctio n
N o rm a l co m m u n ica tio n
When there are several malfunctions existed at the same time, it will display the high level malfunction in priority by a
sequence as: communication malfunction air exhaust protection
low pressure protection.
In d ica to r d is p la y
Ou td o o r m a lfu n ctio n in d ica to r 1 tu rn s
o n , in d o o r ru n in d ica to r blinks
Ou td o o r m a lfu n ctio n in d ica to r 3 tu rn s
o n , in d o o r ru n in d ica to r blinks
Ou td o o r m a lfu n ctio n in d ica to r 2 tu rn s
o n , in d o o r ru n in d ica to r blinks
Ou td o o r m a lfu n ctio n in d ica to rs 1 ,2 ,3
tu rn o n , in d o o r ru n in d ica to r b l i n k s
Ou td o o r in d ica to r 4 ,5 b l i n k i n t u r n
over current protection
Fengyun Series
R e m a rk:
In d o o r Run in d ica to r tu rn o ff 3 s a n d
b l i n k s o n ce
ind o o r R u n in d ica to r t u r n o f f 3 s a n d
b l i n k s 3 t i m e s
In d o o r in d ica to r tu rn o ff 3 s a n d blinks
five tim e s
In d o o r in d ica to r tu rn o ff 3 s a n d blinks
six tim e s
high pressure protection