Gree Ultra Heat GMV-VQ72W/A-F, Service Manual, Page: 134 / 207

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial MAINTENANCE
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If project commissioning is not finished and all the IDUs
‘ project numbers need to be reset, click Set
All IDUs Project Number shown in Fig.2. As shown in Fig.6, the pop-up box comprises two parts:
Systems Selection, where you can choose the system to be reset; Settings box, where you can give the
resetting instruction.
Fig.6
Choose one or multiple systems in the Systems Selection box and click Set in the Settings box, as
shown in Fig.6. Click Set, as shown in Fig.7.
Fig.7
If the conflict is solved, the system will return to the normal status and IDUs can be operated as
shown in Fig.5.
2.2 Flowchart Analyzing
(1) High exhaust temperature protection (E4)
When the system shows high exhaust temperature protection for compressor, the IDU will show
high exhaust temperature fault E4.