GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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(2) Press SW2 (▼) on the controlling unit and select n5. Short press SW7 to show the following
information:
(3) When project number deviation is to be confirmed, short press SW7 confirmation button to enter
the project number deviation status as shown in the following:
IDU project numbers in all systems will automatically deviate. The conflict will be solved in about 1
minute and the system will work properly.
The automatic deviation function only works when it is enabled on the controlling unit in the system,
of which the centralized control address is 00000.
Note:
When there are only a few conflicting IDUs, manual setting is recommended. This method
only applies to conflicting IDUs and does only affect other IDUs' project numbers.
In case of many conflicting IDUs, auto deviation is recommended. This method is faster, but may
change project numbers of normal IDUs. This method applies for the first commissioning after
installation.
Communication
failure between main
control board and
inverter compressor
drive
1.The control board is powered off;
2.The compressor drive board is powered
off;
3.The communication cable between the
control board and compressor drive board
is not connected;
4.The compressor drive board's dial
switch SA201 is wrong.
1.Check the power supply of the control
board. Replace the control board if it works
properly;
2.Check the power supply of the drive
board. Replace the drive board if it works
properly;
3.Connect the main board and drive board
using the communication cable;
4.Adjust the dial switch of the compressor
drive board.
Compressor drive
module reset
protection
1.The compressor drive board is faulty.
1.Replace the compressor drive board.
Inverter compressor
over-current
protection
1.The drive board's IPM module is
damaged;
2.The compressor's UVW cable is not
connected properly;
3.The compressor is damaged.
1.Replace the compressor drive board;
2.Reconnect the compressor's UVW cable;
3.Replace the compressor.
Compressor drive
IPM module
protection
1.The drive board's IPM module is
damaged;
2.The compressor's UVW cable is not
connected properly;
3.The compressor is damaged.
1.Replace the compressor drive board;
2.Reconnect the compressor's UVW cable;
3.Replace the compressor.
Compressor drive
temperature sensor
fault
1.The compressor drive board is faulty.
1.Replace the compressor drive board.
Compressor drive
IPM
over-temperature
protection
1.The compressor drive board is faulty;
2.Thermal gel is not applied evenly on the
IPM module;
3.The IPM module is not screwed
properly.
1.Replace the compressor drive board;
2.Apply thermal gel evenly on the IPM
module;
3.Screw the IPM module properly.
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