Lennox ComfortSense 8500 Installation And Setup Manual page 24

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Table 9. System Status Descriptions
Description
When either of following error occur, this icon would be displayed.
• Some RTU compr. Locked
• All RTU compr. Locked
• RTU fault state - fault detected
• CS fault state - fault detected
There are communication errors.
Lost communications with host.
There are no communication errors.
When RTU state is warm-up mode coming out of an unoccupied state,
this icon will be displayed.
When RTU state is cool-down mode coming out of an unoccupied
state, this icon will be displayed.
Fresh air tempering heating
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