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TK 56171-2-OP-EN
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The unit may be temporarily shut down if a Prevent Alarm is active. The
unit will remain shut down for a timed restart interval or until the fault
conditions are corrected and then restart if necessary.
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If the unit is in a temporary shutdown, Alarm Code 84 will be present
along with the associated Prevent Alarm.
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In some cases, the unit will restart with reduced performance to
determine if continued operation is possible.
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If the unit is operating with reduced performance, Alarm Code 85 may
also be present.
If the alarm does not reoccur with reduced performance, the unit will return
to full performance. In general, if the alarm condition occurs a specified
number of times in a specified time interval, the alarm is set as a Shutdown
Alarm and no further restarts are possible.
N
No
otte
e:: If the Restart After Shutdown feature in the Guarded Access Menu is
set for CONTINUOUS, an unlimited number of restart attempts are
allowed.
Zone Specific Prevent Alarms
A zone specific Prevent Alarm will force the affected zone into a temporary
shutdown, but allow the unit to continue to run as required by the host unit
or other zones.
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A small alarm icon will appear next to the affected zone.
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If installed, the optional remote indicator light will indicate an alarm
condition exists.
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If zone specific Prevent Alarms occur in all zones, the unit will be forced
into a unit level prevent shut down.
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The TemperatureWatch screen is disabled any time a zone specific
Prevent Alarm is active.
Unit Level Shutdown Alarms
Shutdown Alarms are indicated by all of the following:
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The unit will be shut down.
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The alarm icon will appear.
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The display and backlight will flash on and off.
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The display will switch from normal to inverted and back (light areas
become dark and dark areas become light.)
