Gree FLEXX Series Service Manual

GREE DC INVERTER HEAT PUMP CONDENSING UNIT
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4.4.3 How to replace the drive module of compressor
Step 1: First, make sure that power is cut off. Set the universal meter at the AC voltage and measure the
voltage between L1, L2, L3, and N. If each time the voltage is 0V (Errors may occur to the universal meter,
sometimes the voltage may not be 0V), proceed with the next step and put a sign on the power switch that reads
“Under maintenance, don’t switch on”.
Step 2: Measure the voltage between DC bus P and N on the drive board of the compressor. Set the
universal meter at the DC voltage and measure the voltage between P and N as shown below. If the voltage is
below 36V, proceed with the next step. In case that a universal meter is not available, disconnect power for 20min
and then continue with the next step.
Step 3: Remove all the wires on the drive board of the compressor.
Step 4: Remove the screws on the drive board of the compressor. The screws are located in the white circles
as shown above in the picture.
Step 5: Replace with a new compressor drive board. Before replacement, apply some silica gel on the IPM
module.
Step 6: Install the new compressor drive board. Fix the screws and connect the wires correctly.

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)