Gree GMV6 Series

Gree GMV6 DC Inverter VRF Units Service Manual
64
in the order of time.
Operations:
In fault query status, press the SW1 up button and the SW2 down button. LED3 circularly displays
the code and address of the faulty module in history in the order of time (at an interval of 1s), and LED2
displays the fault sequence number. If there is no historical fault, LED2 and LED3 display "00" by default.
Up to five latest historical faults can be queried. Faults that can be stored and queried are as follows:
1
High pressure protection
20
Inverter compressor over-current protection
2 Low pressure protection 21
Current detection circuit fault of the inverter
compressor driver
3 Lack-of-refrigerant protection 22
Loss of synchronization protection for the
inverter compressor
4 Air discharge low temperature protection 23
Communication fault between the primary
controller and inverter compressor driver
5 Over low pressure ratio protection 24
Over temperature protection for the inverter
compressor driver module.
6 Over high pressure ratio protection 25
Temperature sensor fault of the inverter
compressor driver module.
7 Four-way valve air backflow protection 26
Charging loop fault of the inverter compressor
driver.
8 High pressure low protection 27
Under voltage protection for DC bus of the
inverter outdoor fan driver
9 High temperature protection for compressor 1 28
Over voltage protection for DC bus of the inverter
outdoor fan driver
10 High temperature protection for compressor 2 29
IPM module protection for the inverter outdoor
fan driver.
11
Compressor 2 over-current protection
30
Inverter outdoor fan startup failure.
12
Shell roof high temperature protection for
compressor 1
31 Inverter outdoor fan phase loss protection.
13
Shell roof high temperature protection for
compressor 2
32 Inverter outdoor fan driver module reset.
14
Under voltage protection for the DC bus of
inverter compressor driver
33 Inverter outdoor fan over-current protection.
15
Over voltage protection for DC bus of the inverter
compressor driver.
34
Current detection circuit fault of the inverter
outdoor fan driver.
16
IPM module protection for the inverter
compressor driver.
35
Loss of synchronization protection for the
inverter outdoor fan.
17 Inverter compressor startup failure 36
Communication fault between the primary
controller and inverter outdoor fan driver.
18 Inverter compressor phase loss protection. 37
Over temperature protection for the inverter
outdoor fan driver module.
19 Inverter compressor driver module reset. 38
Temperature sensor fault of the inverter outdoor
fan driver module.
The figure below shows the
Debug
page.
LED1
LED2
LED3
Function Code
Display status
Sequence
Display status
Current status
Display status
n6
On
01
On
Historical fault/module
address
Alternated
n6
On
02
On
Alternated
n6
On
03
On
Alternated
n6
On
04
On
Alternated
n6
On
05
On
Alternated
If historical faults are less than five, after the last fault is displayed, LED2 and LED3 display 00,
indicating no more fault.
In fault query status, press and hold the SW3 confirm button for over 5 seconds to clear all historical