RT-SVP011E-EN 101
Troubleshooting
VFD Relief Fan Locked
Motor – X
where X is “1”, “2” or
“3”
Unit Warning Latching*
Relief fan X indicates something has blocked the rotor
from turning. Ice is a common one in some
applications. (Motor Auto Reset)
Failure of fan X with other fans available: No action.
Failure of fan X with the other fans not-available:
Relief damper is closed, relief fan commanded off and
the Economizing will be disable and the outside air
damper will be driven to the active minimum
position.
* The Latching behavior for this
diagnostic is latched
in the drive. When the drive diagnostics are reset this
diagnostic will be cleared in the Symbio™ 800
controller by setting its persistence to Non-Latching.
Local
VFD Relief Fan Motor
Ov
erheated – X
where X is “1”, “2” or
“3”
Unit Warning Latching*
Relief fan X indicates motor thermocouples have
reached a too-high temperature. Typically caused by
excessively high ambient temp. (Motor Manual
Reset)
Failure of fan X with other fans available: No action.
Failure of fan X with the other fans not-available:
R
elief damper is closed, relief fan commanded off and
the Economizing will be disable and the outside air
damper will be driven to the active minimum
position.
* The Latching behavior for this
diagnostic is latched
in the drive. When the drive diagnostics are reset this
diagnostic will be cleared in the Symbio™ 800
controller by setting its persistence to Non-Latching.
Local
VFD Relief Fan Power
Mo
d Overheated – X
where X is “1”, “2” or
“3”
Unit Warning Latching*
Relief fan X indicates rectifier thermocouple has
reached a too-high temperature. Typically caused by
excessively high ambient temp. (Motor Manual
Reset)
Failure of fan X with other fans available: No action.
Failure of fan X with the other fans not-available:
Relief damper is closed, relief fan commanded off and
the Economizing will be disable and the outside air
damper will be driven to the active minimum
position.
* The Latching behavior for this
diagnostic is latched
in the drive. When the drive diagnostics are reset this
diagnostic will be cleared in the Symbio™ 800
controller by setting its persistence to Non-Latching.
Local
Diagnostics Target Severity Persistence Condition / Response Reset Level
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