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Error Conditions
7
The zone panel continually monitors various components of the zone system and will display a message when the
following monitored conditions are detected.
COOL DISABLE
Cooling is disabled when Emergency Heat has been
selected on a heat pump system
Selecting emergency heat from a thermostat (See Installer
Option 21) in heat mode will disable compressor cooling in all
zones. To enable cooling, turn Emergency Heat Off at the panel
and/or the priority thermostat calling for emergency heat and
make a call other than emergency heat from the priority thermostat.
High Plenum Temperature (PLENUM HI)
Displayed when the Plenum Temperature is exceeded during
equipment heating operation. All heating stages will be turned off
and the fan will be turned on until the plenum temperature returns
to the normal range. Service the system immediately to prevent
potential damage.
17
Low Plenum Temperature (PLENUM LO)
Displayed when the Plenum Temperature is too low during
equipment cooling operation. All cooling stages will be turned off
and the fan will be turned on until the plenum temperature returns
to the normal range. Service the system immediately to prevent
potential damage.
(continued)
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