GMV DC Inverter VRF
56
Instruction for each stage progress at the time of debugging
——
Debugging
code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
07_indoor unit
componets
inspection
db
ON
07
ON
XXXX/cor
respoding
error
code
ON
The system detected an indoor unit fault.
XXXX indicates engineering number of fault
indoor unit, and the corresponding fault code is
displayed 2s later. For example, if there is D5
fault in the No. 100 indoor unit, LED3 displays
as follows: 01 (after 2s) 00 (after 2s) d5, and
they will be displayed circularly.
db
ON
07
ON
OC
ON
The system detected that there's no outdoor
unit fault. Enter into the next step
automatically.
08_compress
or reheat
comfirmation
db
ON
08
ON
U0
ON
Preheat time for compressor is insufficient.
db
ON
08
ON
OC
ON
Preheat time for compressor is enough. Enter
into the next step automatically.
09_refrigerant
judge before
startup
db
ON
09
ON
U4
ON
The system refrigerant is insufficient. Please
charge the refrigerant until the fault is
eliminated.
db
ON
09
ON
OC
ON
The system refrigerant judge is normal. Enter
into the next step automatically.
10_ status
judgment of
main pipeline
before
starting
db
ON
10
ON
ON
ON
Starting up the operation.
db
ON
10
ON
U6
ON
Main pipeline status is abnormal.
db
ON
10
ON
OC
ON
Main pipeline status is normal.
11_ reserved
function
db
ON
11
ON
AE
ON
——
12_ reserved
function
db
ON
12
ON
01
ON
——
13~15_pilot
run stage
db
ON
13/14/1
5
ON
AC
ON
Test run under heating mode.
db
ON
13/14/1
5
ON
AH
ON
Test run under cooling mode.
db
ON
13/14/1
5
ON
Correspo
nding
error
code
ON
There is fault in the pilot run stage.
Note: fault module display.
db
ON
13/14/1
5
ON
J0
ON
There is fault in the pilot run stage.
Note: non-fault module display.
db
ON
13/14/1
5
ON
XXXX/U8
ON
The system detected the indoor unit's pipeline
is abnormal. XXXX indicates the engineering
number of fault indoor unit. Error code U8 is
displayed after 2s. For example, if the U8 fault
occurs in the No. 100 indoor unit, LED3
displays as follows: 01 (after 2s) 00 (after 2s)
U8, and they will be displayed circularly.
Note: In the pilot run stage, the unit will display corresponding procedures according to actual
circumstances.
