48
BAS-SVX44C-EN
Other Functional Components
Compressor Protection
Compressor protection prevents damage to the compressor of either an air conditioning or heat pump
system. Damage could occur if the compressor is restarted too soon after shutdown. This feature causes
the compressor to delay between 0 to 10 minutes, depending on previous state of compressor (
ON
or
OFF
), and Configuration Option Number 0182.
Note:
The Heat/Cool algorithm will add anywhere from 0 to 5 minutes and Configuration Option Number
0182 can add an additional 0 to 5 minutes, depending on the setting.
A time delay is activated after the compressor turns
OFF
. During the delay (when there is a call for cool
or heat pump heat), either Cool/ Heat indicator icons will blink on the LCD screen for a duration of 1.5
seconds
ON
and 0.5 seconds
OFF
. When this time expires, either
Cool Mode
or
Heat Mode
displays solid
on the screen and the compressor turns
ON
.
The delay timer is also activated upon initial startup and after power interruptions.
Permanent Memory Data
When setting up the thermostat, the schedule and configuration values are stored to permanent memory.
These permanent values are restored each time at startup. If a Checksum error occurs in permanent
memory, the factory default preset parameters are used and are stored to permanent memory.
The entire permanent memory data can be reset manually back to factory default data using Configuration
Option Number 0300.
Note:
In instances where there is a loss of two (2) power cycles, the firmware limits the EEPROM write
to five (5) writes of data for 24 hours. Thereafter, the EEPROM write capability is disabled. After
24 hours, the counter resets and allows five more 2-cycle power loss EEPROM writes for the next
24 hours.
Compressor and Auxiliary Heat Lockout
This function is available with only Configuration Option Number 0210 set to 2 and with one or both
Configuration Option Numbers 0220 and 0221 set to some other setting except zero (0). Compressor and
auxiliary heat is used for heat pump systems with more heat stages than cool stages. When the
temperature from an outdoor sensor is:
•
Above the auxiliary lockout point, only the compressor will operate on a call for heat.
•
Below the compressor lockout point, only the auxiliary heat will operate on a call for heat.
•
Between the compressor and auxiliary lockout points, the compressor and auxiliary heat will operate
on a call for heat.
Summary of Contents for BAYSTAT152A
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