Gree GMV6 DC Inverter VRF Units Service Manual
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Meaning
Progress
Code
Display
Code
Display
Code
Display
07_indoor unit’s
parts inspection
db ON 07 ON OC ON
The system detected
that there’s no fault for
indoor unit’s parts. Then
it will automatically
enter into the next step.
If an abnormality is detected, it will stay in the current state and manual troubleshooting is required.
The corresponding faults are as below:
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Meaning
Progress
Code
Display
Code
Display
Display
07_indoor unit’s parts
inspection
db ON 07 ON
XXXX/
correspodin
ON
The system detected that
there’s fault for indoor
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.
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Meaning
Progress
Code
Display
Code
Display
Code
Display
08_compressor
preheat confirmation
db ON 08 ON OC ON
Compressor’s preheat time has
reached 2h, and then it will enter
If the preheat time for compressor hasn’t reached 2h, there will be abnormal phenomenon. The
display is as below.
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Meaning
Progress
Code
Display
Code
Display
Code
Display
08_compressor
db ON 08 ON U0 ON
The preheat time for compressor
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.
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Meaning
Progress
Code
Display
Code
Display
Code
Display
09_refrigerant
judgement before
db ON 09 ON 0C ON
The system refrigerant judgment is
normal. It will automatically enter