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Debugging code Progress code
LED1
Progress
Display
Code
db
05_ detect
db
internal
communicatio
n
db
db
db
db
06_outdoor
unit's internal
components
confirmation
db
db
07_indoor unit
componets
inspection
db
db
08_compress
or reheat
comfirmation
db
db
09_refrigerant
judge before
startup
db
10_ status
db
judgment of
db
main pipeline
before
db
starting
11_ reserved
db
function
Instruction for each stage progress at the time of debugging
LED2
Display
Code
status
status
ON
05
ON
ON
05
ON
ON
05
ON
ON
05
ON
ON
05
ON
ON
06
ON
ON
06
ON
ON
07
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
GMV Heat Recovery DC Inverter VRF
Status code
LED3
Display
Code
status
C2
ON
C3
ON
CH
ON
CL
ON
OC
ON
corresponding
ON
error code
OC
ON
XXXX/
correspoding
ON
error code
OC
ON
U0
ON
OC
ON
U4
ON
OC
ON
ON
ON
U6
ON
OC
ON
AE
ON
58
Meaning
The system has detected
"communication malfunction between
main control and inverter compressor
driver".
The system has detected
"communication malfunction between
main control and inverter fan driver".
Indoor/outdoor unit's "rated capacity
ratio is too high."
Indoor/outdoor unit's "rated capacity
ratio is too low".
System inspection is finished. Enter
into the next step automatically.
The system has detected the fault of
outdoor unit' components.
The system detected that there's no
outdoor 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 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.
The system detected that there's no
outdoor unit fault. Enter into the next
step automatically.
Preheat time for compressor is
insufficient.
Preheat time for compressor is enough.
Enter into the next step automatically.
The system refrigerant is insufficient.
Please charge the refrigerant until the
fault is eliminated.
The system refrigerant judge is normal.
Enter into the next step automatically.
Starting up the operation
Main pipeline status is abnormal
Main pipeline status is normal
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