Gree GMV6 DC Inverter VRF Units Service Manual
24
If an abnormality is detected, it will stay in the current state and manual troubleshooting is required.
The corresponding faults are as below:
—
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Display
status
Code
Display
status
Code
Display
status
Display
status
07_ indoor unit
componets inspection
db
ON
07
ON
XXXX/
correspodin
g error code
ON
The system detected that
there’s fault for indoor
unit’s parts.
XXXX indicates the engineering no. of fault indoor unit. 3s later, the corresponding error code will be
displayed. For example, if d5 fault occurs for No.100 indoor unit, LED3 displays as below: 01 (2s later)
00(2s later) d5, and they will display like that circularly.
Refer to the part of “Troubleshooting” for the corresponding troubleshooting method.
Step 11:
The debugging step 08 is “compressor preheat confirmation”.
If the preheat time has reached for 2h, the display is as below. Then it will enter into the next step for
inspection.
—
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
08_compressor
preheat confirmation
db
ON
08
ON
OC
ON
Compressor’s preheat time has
reached 2h, and then it will enter
into the next step.
If the preheat time for compressor hasn’t reached 2h, there will be abnormal phenomenon. The
display is as below.
—
Debugging code Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
08_compressor preheat
confirmation
db
ON
08
ON
U0
ON
The preheat time for compressor
hasn’t reached 2h.
Step 12:
Unit debugging step 09 is “refrigerant judgment before startup”.
If the amount of refrigerant inside the system satisfies the requirements for starting the operation,
the display is as below. Then it will automatically enter into the next step.
—
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
09_refrigerant
judgement before
startup
db
ON
09
ON
0C
ON
The system refrigerant judgment is
normal. It will automatically enter
into the next step.
If there is no refrigerant in the system or the amount of refrigerant does not meet the requirements
for starting operation, the unit will display U4 “Refrigerant-lacking protection”, as shown below. The unit
will enter into the next step. At this time, it is necessary to check whether there is a leak or charge some
refrigerant until the abnormality is eliminated.