Gree Ultra Heat GMV-VQ72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION
108
Code
Display
status
Code
Display
status
Code
Display
status
07_Detect
indoor
components
XXXX/
Error
code Light
System detects error on indoor
components. XXXX means the
project code of IDU with error. 3s
later, related error code will be
displayed.
Elimination methods of above errors can be found in Troubleshooting.
Step 13: Progress 08
is ―Confirm preheated compressor‖.
At first, make sure that the ODU valves connecting with IDU are opening. Main board will display:
——
Debugging code Progress code Status code
Progress
LED1 LED2 LED3
Code Display status Code Display status Code Display status
08_Confirm preheated
compressor
db Light 08 Light on Light
If the ODU valves connecting with IDU have been opened manually, then press SW4 confirmation
button on the master unit to confirm it.
If ODU compressors have been preheated for more than 8h, system will display as below and start
next progress.
——
Debugging code Progress code Status code
progress
LED1 LED2 LED3
Code Display status code Display status Code Display status
08_Confirm preheated
compressor
db Light 08 Light oC Light
If less than 8h of preheat time is detected, system will give error alarm and display as below. Then
press SW4 confirmation button and SW2 button at the same time to skip the wait time and start next
progress. But this will cause force start of the compressor, which may damage the compressor.
——
Debugging code Progress code Status code
Progress
LED1 LED2 LED3
Code Display status Code Display status Code Display status
08_Confirm preheated
compressor
db Light 08 Light
U0/
Preheat
time
Blink
Step 14: Progress 09
is ―Refrigerant judgments before startup‖.
If the refrigerant quantity inside the system meets the requirement of operation startup, system will
display as below and start next progress.
——
Debugging code Progress code Status code
progress
LED1 LED2 LED3
Code Display status code Display status Code Display status
09_Refrigerant
judgments before
startup
db Light 09 Light oC Light
If there‘s no or not enough refrigerant in the system to meet the requirement of operation startup,
system will display U4 ―refrigerant shortage protection‖ and fails to start next progress. Then check if
there‘s any leakage or add refrigerant inside until error eliminates.