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Dc Inverter VRF plus Water Heater Solution Service Manual CONTROL
78
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.
When the evaporator temperature sensor is in trouble, the evaporator temperature is measured lower than -30
℃
or higer than 100
℃
for one minute continuously,, the evaporator temperature sensor error signal will disappear,
and the indoor unit will operate as the former state.
◆
The measure times should not be accumulatived
Fault Type
Error Code
Indoor ambient temperature sensor error
F0
Indoor tube-inlet sensor error
F1
Indoor tube sensor error
F2
Indoor tube-exit sensor error
F2
1m
1m
1m
1m
<1m
上限值
下限值
t
感温包
温度
感温包故
障状态
故障产生
故障恢复
故障产生
故障恢复
9) Address setting of indoor unit
Indoor unit at the same units must have exclusive address to operate, so you should set the address when
installing the indoor unit.
The address of indoor unit at the same units is not allowed to repeat.
The address of the same indoor unit should conform to the address of remote controller.
The address setting of indoor unit and remote controller should use address DIP switch, which is set on the
mainboard of indoor unit and remote control, and has the sign of “address”.
Upper limit value
Lower limit value
Sensor fault state
Temperature
of sensor
Error
producing
Error
producing
Error resume
Error resume