Gree GMV-120WM/B-F

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
164
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.
Fault
code
Fault
Possible reasons
Solution
C2
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.
P3
Compressor drive
module reset protection
1. The compressor drive board is faulty.
1. Replace the compressor drive
board.
P5
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.
P6
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.
P7
Compressor drive
temperature sensor fault
1. The compressor drive board is faulty.
1. Replace the compressor drive
board.
P8
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.
P9
Inverter compressor
out-of-step protection
1. The compressor drive board is faulty.
2. The compressor is damaged.
1. Replace the compressor drive
board.
2. Replace the compressor.
PH
Compressor drive DC
bus high voltage
protection
1. Does the voltage of the input power
cable of the whole system exceed 465 V;
2. The compressor drive board is faulty.
1. Lower the voltage of the input
power cable to the required range;
2. Replace the compressor drive
board.
PL
Compressor drive DC
bus low voltage
protection
1. Is the voltage of the input power cable of
the whole system lower than 200 V;
2. The compressor drive board is faulty.
1. Elevate the voltage of the input
power cable to the required range;
2. Replace the compressor drive
board.
PC
Compressor drive
current check circuit
fault
1. The compressor drive board is faulty.
1. Replace the compressor drive
board.
PF
Compressor drive
recharging circuit fault
1. Is the voltage of the input power cable of
the whole system lower than 200 V;
2. The compressor drive board is faulty.
1. Elevate the voltage of the input
power cable to the required range;
2. Replace the compressor drive
board.
PJ
Inverter compressor
starting failure
1. The drive board is damaged;
2. The compressor's UVW cable is not
1. Replace the compressor drive
board;