Gree DC Inverter Multi VRF

DC INVERTER MULTI VRF CONTROL
53
the flooding signal disappears.
水泵关
压缩机关
非制冷
制冷
非制冷
制冷停机
压缩机开
压缩机关
5m 5m
水泵开
水泵关 水泵关
水泵开
t
8
s
10m
t
水泵关
水泵开
水泵关
水满信号无效
水满信号有效
水满信号消除
6) Anti- frosting operating undercooling and drying operation
When evaporator temperature is too low under cooling and drying operation, in order to avoid indoor unit frosting
and affect the cooling effect, you should carry out anti frosting operating at approproate time.
Under cooling and drying mode, after the compressor starts for T
Compressor
(minutes), when continuously
measuring that the T
Tube-inlet temperature
≤T
Frosting temperature
of evaporator for T
antifrosting
,, the antifreezing protection will
operate and the indoor fan and swing fan will keep the former state; when the T
Tube-inlet temperature
≤T
Frosting temperature
,
the LED will not light and the controller will operate as setting mode.
The parameter of T
Compressor
, T
Defending frost
, T
Frosting temperature
and T
Reset temperature
will be different according to the model,
as shown:
Model T
Compressor
(m)
T
Defending frost
(m)
T
Frosting temperature
(℃)
T
Reset temperature
(℃)
Series of
cassete and
duct type
15 10 -4 15
Series of wall
mounted
type
6 3 0 10
7) Controling of indoor electronic expansion valve
◆ Reset control of indoor electronic expansion valve
When the indoor unit is energized, it will automatically carry out the electronic expansion valve reposition action,
to make the electronic expansion valve return the initial position, and ensure the accuracy of expansion valve’s
action.
Controling of superheat◆ ing degree in cooling mode
In the operation process of cooling and drying , to keep suitable superheating degree, the unit will control the jaw
opening of indoor electronic expansion valve according to the difference between entry temperature and setting
superheating value of indoor unit evaporator.It will be detected every 40 seconds. This process will stop when
powering off, stop after reaching temperature point and malfunction.
Controlling of ◆ supercooling degree in heating mode
In the operation process of heating, to keep suitable supercooling degree, the unit will control the jaw opening of
indoor electronic expansion valve according to the difference between entry temperature and setting supercooling
value of indoor unit evaporator. It will be detected every 40 seconds. This process will stop when powering off, stop
after reaching temperature point and malfunction.
8) Controling of sensor test
◆ Ambient temp. sensor
When the ambient temperature is measured lower than -20℃ or higer than 100℃ for one minute continuously,
the ambient sensor error signal will be sent(error code: F0), and then indoor unit will stop for abnormity.
When the environment sensor is in trouble, the environment temperature is tested lower than -20℃ or higer
than 100℃ for one minute continuously, the ambient sensor error signal will disappear, and indoor unit will operate
as the former state.
Evaporator temp sensor◆
When the evaporator temperature is measured lower than -30℃ or higer than 100℃ for one minute
continuously,the evaporator temp sensor error signal will be sent (error code: F0), and then indoor unit will stop for
abnormity.
Cooling
Non-cooling
Non-cooling
Cooling stop
Compressor start
Compressor stop
Compressor stop
Pump start
Pump start
Pump start
Pump stop Pump stop
Pump
stop
Pump stop Pump stop
Water full signal is disappears
Water full
signal is
invalid
Water full
signal is valid