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Debugging
—
code
LED1
Progress
Display
Code
db
06_outdoor
unit
components
inspection
db
db
07_indoor
unit
components
inspection
db
db
08_compress
or preheat
db
confirmation
db
09_refrigerant
judge before
start up
db
10_status
db
judgment of
db
main pipeline
before
db
starting
11_reserved
db
function
12_reserved
db
function
db
db
db
13~15_pilot
run stage
db
db
Note: In the pilot run stage, the unit will display corresponding procedures according to actual
circumstances.
When master module displays as below, the complete unit has conducted the debugging and it
stays at the standby status.
Instruction for each stage progress at the time of debugging
Progress code
LED2
Display
Code
status
status
correspod
ON
06
ON
ON
06
ON
XXXX/cor
respoding
07
ON
ON
ON
07
ON
ON
08
ON
ON
08
ON
ON
09
ON
ON
09
ON
ON
10
ON
ON
10
ON
ON
10
ON
ON
11
ON
ON
12
ON
13/14/1
ON
ON
5
13/14/1
ON
ON
5
13/14/1
ON
ON
5
13/14/1
ON
ON
5
13/14/1
ON
ON
5
Status code
LED3
Display
Code
status
The system has detected the fault of outdoor
ing error
ON
unit' components.
code
The system detected that there's no outdoor
OC
ON
unit fault. Enter into the next step
automatically.
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
error
ON
D5 fault in the No. 100 indoor unit, LED3
code
displays as follows: 01 (after 2s) 00 (after 2s)
d5, and they will be displayed circularly.
The system detected that there's no outdoor
OC
ON
unit fault. Enter into the next step
automatically.
U0
ON
Preheat time for compressor is insufficient.
Preheat time for compressor is enough. Enter
OC
ON
into the next step automatically.
The system refrigerant is insufficient. Please
U4
ON
charge the refrigerant until the fault is
eliminated.
The system refrigerant judge is normal. Enter
OC
ON
into the next step automatically.
ON
ON
Starting up the operation.
U6
ON
Main pipeline status is abnormal.
OC
ON
Main pipeline status is normal.
AE
ON
—
01
ON
—
AC
ON
Test run under heating mode.
AH
ON
Test run under cooling mode.
Correspo
nding
There is fault in the pilot run stage.
ON
error
Note: fault module display.
code
There is fault in the pilot run stage.
J0
ON
Note: non-fault module display.
The system detected the indoor unit's pipeline
is abnormal. XXXX indicates the engineering
number of fault indoor unit. Error code U8 is
XXXX/U8
ON
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.
53
GMV DC Inverter VRF
Meaning
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