Gree U-Match 6 Series

GREE U-Match 6 SERIES UNIT SERVICE MANUAL
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2.2.3 Protection Control
2.2.3.1 High Pressure Protection Control (Only for 100/125/140/160 units)
System will enable high pressure protection control if the high pressure switch is detected open for
continuously a little time. Under high pressure protection, system will be shut down and display error code
E1.
When high pressure protection occurs for the first time, system will restore operation if the high
pressure switch is detected to be reclosed for continuously a little time. When high pressure protection
occurs for the second time in a certain time period, system will not restore operation. You need to
manually turn off the unit and clear the error before restarting up the unit. (If high pressure protection
occurs frequently, please send for professional personnel to repair.)
2.2.3.2 Low Pressure Protection Control (Only for 100/125/140/160 units)
System will enable low pressure protection control if the low pressure switch is detected open for
continuously a little time. Under low pressure protection, system will be shut down and display error code
E3. When low pressure protection occurs, system will restore operation if the low pressure switch is
detected to be reclosed within a few minutes after shutdown. If low pressure protection occurs for several
times in a period of time, system will not restore operation automatically. You need to manually turn off the
unit before restarting up the unit.
2.2.3.3 High Temperature Prevention Control
Under heating mode, system will enable high temperature prevention control if the temperature
sensed by indoor tube temperature sensor reaches a certain value. When high temperature prevention
control is enabled, outdoor fan will slow down.
2.2.3.4 Overload protection function
Overload protection function in cooling and dehumidification mode. Motor overload protection and
overcurrent protection Overload protection: When the motor's load exceeds the motor's capacity, the
temperature increases, and the motor current exceeds the rated value. The value of overload protection is
far below the value of overcurrent protection, but it prevents the device overload than the normal load.