Gree FLEXX Series Service Manual

GREE DC INVERTER HEAT PUMP CONDENSING UNIT
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3.4.2 “E3” Compressor Low-pressure Protection, Refrigerant Shortage
Protection, Refrigerant Recovery Mode
Error display:
ODU mainboard LED displayer
Error judgment condition and method:
It is judged through the action of low pressure switch. If the low pressure switch is cut off, it is judged that low
pressure is too low and the system stops operation for protection.
Possible reason
：
■Cut-off valve of ODU is not fully opened;
■Low pressure sensor is abnormal;
■Outdoor or indoor fan is not working properly;
■IDU filter or air duct is blocked (cooling mode);
■Ambient temperature is too low;
■Refrigerant charging amount is insufficient;
■System pipeline is blocked;

Gree FLEXX Series Specifications

General

Type	Heat Pump
Series	FLEXX
SEER	Up to 20
HSPF	Up to 10
Refrigerant	R410A
Heating Operation Range	-22°F to 75°F
Cooling Operation Range	5°F to 122°F
Operating Temperature Range (Heating)	-22°F to 75°F
Operating Temperature Range (Cooling)	5°F to 122°F
Energy Efficiency Ratio (EER)	Up to 12.5
Dimensions (Outdoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Compressor Type	Inverter
Power Supply	208/230V, 1Ph, 60Hz
Noise Level	As low as 55 dB(A)