Gree GMV-450WM/B-X - Page 97

GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
94
If no quit button operations are performed on the master unit for 30 minutes, the function setting
automatically quits and the unit restores the current status.
Step 6: If the n9 IDU address query is selected, the display is as follows:
LED1
LED2
LED3
Function
Code
Display
Mode
Number of IDUs
(Thousands-place
Hundreds-place)
Display
Mode
Number of IDUs
(Tens-place
Ones-place)
Display
Mode
n9
On
00
On
00
Blinking
The digital LED2 displays the number of IDUs (thousands-place hundreds-place) and the digital LED3
displays the number of IDUs (tens-place ones place). For example, if the number of IDUs is 75, "0075" is
displayed.
If no button operations are performed on the master unit for five minutes, the function setting
automatically quits and the unit restores the current status.
Note: The online IDU quantity query function applies to a single refrigerating system only.
Step 7: If the n6 fault query is selected, the display is as follows. Enter the to-be-confirmed status of fault
query.
LED1
LED2
LED3
Function
Code
Display
Mode
Current
Progress/Mode
Display
Mode
Current
Status
Display
Mode
n6
Blinking
00
Blinking
00
Blinking
Press "SW7" on the master unit to confirm fault query.
Select a fault to be queried by pressing "SW1 (UP)" or "SW2 (DOWN)". LED3 alternately displays the
historical fault code and module address in an interval of one second in the sequence of fault records.
LED2 displays the fault sequence number. If there not historical faults, LED2 and LED3 display ―00‖ by
default. Up to five historical faults can be queried. The faults that can be queried are as follows:
Code
Code
E1
High-pressure protection
P9
Inverter compressor out-of-step
protection
E3
Low-pressure protection
C2
Communication failure between the
master unit and inverter compressor
driver
U4
Lack of refrigerant protection
P8
Over-high temperature protection for
inverter compressor driver module
E2
Discharge low-temperature protection
P7
Temperature sensor failure of inverter
compressor driver module
J9
Over-low pressure ratio protection
PF
Charge circuit failure of inverter
compressor driver
J8
Over-high pressure ratio protection
HL
DC bus line over-low voltage
protection for inverter outdoor fan
driver
J7
Four-way valve leakage protection
HH
DC bus line over-high voltage protection
for inverter outdoor fan driver
E5
High-temperature protection of
compressor 1
H6
Inverter outdoor fan driver IPM module
protection
E6
High-temperature protection of
compressor 2
HJ
Inverter outdoor fan startup failure
J2
Over-current protection of compressor
2
HE
Inverter outdoor fan phase lack
protection
EU
Top high-temperature protection of
compressor 1
H3
Inverter outdoor fan driver module
reset
Eb
Top high-temperature protection of
compressor 2
H5
Inverter outdoor fan over-current
protection
PL
DC bus line over-low voltage protection
for inverter compressor driver
HC
Current detection circuit failure of
inverter outdoor fan driver
PH
DC bus line over-high voltage
H9
Inverter outdoor fan out-of-step