20 BAS-SVX44A-EN
Power, System Tests, and Software Reset
System Tests
The system test mode is used to run diagnostics on the thermostat to verify that the unit is
functioning properly.
Referring to Table 6, p. 22, to run a system test:
1. Remove the thermostat cover as shown in the section,“Mounting the Backplate,” p. 10.
2. Press and hold the Configuration button
(refer to Figure 17, p. 21) for 3 seconds. The
configuration/test icon ( ) displays and the thermostat is now in Configuration
Setup
Mode.
3. Press and hold the Configuration button
for 3 seconds again to activate System Test Mode
indicated by the blinking parameter/test icon. When activating system test mode, the first
system test number displayed is always 01.
The test number is changed with the Up ( ) or Down ( ) arrows in the center of the display
screen.
Note: The OK button ( ) functions the same as the Up arrow and steps to the next
higher test number.
The test value is changed with the Up ( ) or Down ( ) arrows on the right-hand side of
the display screen.
Note: Changing
a test value will start/stop the test as described in Table 6. Refer to
Figure 17 for arrow locations and Table 6, p. 22 for a list of test values and test
value descriptions.
4. Exit the System
Test Mode and return to the Home screen by:
a. Pressing the Configuration button
momentarily (less than 3 seconds).
b. Touching and holding for 2 seconds.
c. Powering down the thermostat and then powering it up again.
d. Waiting for a 10-minute time out after the last touch.
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).
3 E3;
• Permanent data error. Access error or checksum error is detected.
4 E0;
• Temperature sensor error. Checks internal and/or external temperature sensor depending on
setting of configuration option 0210.
5
E1;
• Humidity sensor error. Checks internal or external humidity sensor depending on setting of
configuration option 0200.
6 E5;
• Real Time Clock (RTC) Error.
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