Gree GWC30LB-D3DNA3G Service Manual page 25

Protection
②
Protection is the same as that under the cooling mode.
(3) Heating Mode
Working conditions and process of heating
①
If T Tpreset +3.6
amb.
will operate simultaneously, and the indoor fan will run at preset speed in the condition of preset cold air prevention.
If T T +9 , the compressor will stop, the outdoor fan will stop with a time lag of 60s, and the indoor fan will stop after
F
amb. preset
60- second blow at low speed
If T +3.6 F <T < T
preset amb.
Under this mode, the four-way valve is energized and temperature can be set within a range of 61 - 86 . The operating
symbol, the heating symbol and preset temperature are revealed on the display.
Condition and process of defrost
②
When duration of successive heating operation is more than 45 minutes, or accumulated heating time more than 90 minutes, and
one of the following conditions is reached, the unit will enter the defrost mode after 3 minutes.
41
F
outdoor am . outdoor pipe
B 28.4 F
outdoor am .
C 23 F 28.4
outdoor am .
D 14 F 23
outdoor am .
14 F
outdoor am . outdoor pipe
fter energi ation when defrosting for the first time
defrosting the
compensation
a. outdoor pipe 35.6
At that time, the indoor fan stops and the compressor stops, and after 60 seconds the outer fan will stop, and then after 30
seconds, the four-way valve will stop. After 30 seconds, the compressor is initiated for raising the frequency to defrost freq u ency.
When the compressor has operated under defrost mode for 10 minutes, or T
operation. After 30 seconds, the compressor will stop. And after another 30 seconds, the four-way valve will be opened, and af t er
60 seconds, the compressor and the outer fan will be started, the indoor fan will run under preset cold air prevention conditio ns,
and H1 will be displayed at temperature display area on the display panel. Defrost frequency is 70Hz.
3.Protection
Cold air prevention
The unit is started under heating mode (the compressor is ON):
① In the case of T
indoor amb.
a time lag of 2 minutes. Within 2 minutes, if T
low speed, the indoor fan will be converted to operation at preset speed. Within 1-minute low speed operation or 2-minute non-
operation, if T >108
tube
In the case of T
②
indoor amb.
converted to preset speed. Within one-minute low speed operation, if T
Note: T indicated in
indoor amb.
start the compressor is performed according to the program, or after the unit is withdrawn from defrost, the indoor ambient temperature
before the defrost symbol is cleared.
Total current up and frequency down protection
If the total current I
total
will run at reduced fre uency and if I
(4) Fan ode
nder the mode the indoor fan will run at preset speed and the compressor the outdoor fan the four-way al e and the electric
heater will stop.
nder the mode temperature can e set within a range of 61 - 86
(5) O ode
① Wor ing conditions and process of
nder O mode standard cooling temperature
a. Once energi ed if
mode and the run indicator will e right and if
22
, the unit enters heating mode, in which case the four-way valve, the compressor and the outdoor fan
F
+9 F , the unit will maintain its original operating status.
preset
28.4
F
F 17.6 F
outdoor pipe
F -
outdoor pipe compensation
-
compensation outdoor am
is determined y the
outdoor pipe
compensation 0 . outdoor pipe 35.6
F F
<75 F : if T 104 and the indoor fan is at stop state, the indoor fan will begin to run at low speed with
F
tube
>104 , the indoor fan also will run at low speed; and after 1-minute operation at
tube
, the fan will run at present speed.
F
75 : if T 108 , the indoor fan will run at low speed, and after one minute, the indoor fan will be F
F
tube
and refers to, under initially heating mode, the indoor ambient temperature before the command to
① ②
16A, frequency rise will be allowed; if I
20 the compressor will stop and the outdoor fan will stop with a time lag of 60s.
total
O mode
71.6 the unit will e started under heating mode if 71.6
F
am
am
-5.4 F
outdoor am
.-5.4 F
0 . If it is not the firstly time for
F
compensation
of last time uitting defrosting.
compensation 5.4
F
outer tube
F
>104 F
tube
17 fre uency rise will not e allowed if I
total
F .
is 77 F and standard heating temperature
preset
78.8 F the unit will e started under cooling mode.
F
50 , the compressor will be converted to 46Hz
F
, the indoor fan will be converted to preset speed.
total
is 68
preset
F . 78.8 the unit will run under fan
F
am
Service Manual
F
18 the compressor
F .