20
BAS-SVX44C-EN
Power, System Tests, and Software Reset
This section provides information about:
•
Applying power
•
Power-up test
•
System tests
Applying Power
Restore power to the HVAC equipment. The thermostat initiates a power-up test and will display an error,
if one is detected (refer to the sections,
and
). If no errors are
detected, the home screen appears as shown in
.
Figure 16. Home screens
Power-up Test
The power-up test is performed any time power is applied to the thermostat. At the start of the power-up
test, the thermostat screen will display the following sequence of events,
in order
:
•
All icons for approximately 1.5 seconds and then;
•
The firmware version for 1.5 seconds (
in the clock digit location
), and finally;
•
Self-testing.
If an error is detected, the error code will display whereby, the user can bypass the error by pressing the
Cancel
icon (
). Once the self-testing has completed checking for any errors, the thermostat will display
the
Home
screen.
During the test, the configuration/test icon (
) blinks on the LCD screen indicating a test is in progress.
lists the sequence of tests that occurs:
Note:
For a detailed list and descriptions of error codes, refer to the section,
Example of Home Screen:
Heat Only
Example of Home Screen:
Auto Heat/Cool
Table 5. Error code test sequence
Test
Sequence
Error Code and Description
1
E4;
• Operating range is 18 to 32 Vrms.
• Low error detection is less than 16.6, ±8.5%.
• High error detection is greater than 34, ±8.5%
2
E7;
• Memory error (
write and read 0x55 and 0xAA failed
).
Summary of Contents for BAYSTAT152A
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