i. 0H7: Incorrect Number of IDUs
1. Error display:
ODU display: 0H7
2. Applicable models:
38VMA***HDS5-1 (208/230V-3Ph-60Hz)
38VMA***HDS6-1 (460V-3Ph-60Hz)
3. Error definition:
The number of physically connected indoor units to an outdoor unit does not match the ENC3 + S12 setting.
4. Possible causes:
• Incorrect number of IDUs set for the main board of the ODU
• Duplicated addresses exist for the IDUs in the system
• IDU power is OFF
• The communication line between IDU and ODU or some IDUs are installed incorrectly
• Damaged individual main board of IDU
• Damaged main board of ODU
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