48 BAS-SVX44A-EN
Error Codes and Exceptions
Error Codes
Error codes indicate a possible need for technical assistance. Error codes display where the time
of day is located. When an error occurs, the error code will blink first (for 3 seconds) and then blink
the time of day (for 1 second) and back to the error code in 4-second intervals.
During normal operation, the errors will be displayed in the following priority:
E4 > E0 > E1 > E3 > E5 > E7; only the highest priority code will display. If there are multiple error
codes, once the first code is cleared, the next code will display according to priority. The following
table provides a list of codes and descriptions:
Table 11.Error codes
Code Description of Occurrence
E0; Internal/External
Thermistor
(Refer to 0210)
• 0210= 0,1, or 2; Local internal thermistor resistance is less that 714 (209°F [98.3°C]) or greater than
561 k (-53.3°F [-47.5°C])
• 0210= 3; Remote external thermistor (S1, S2) resistance is less than 714 (209°F [98.3°C]) or greater than
561 k (-53.3°F [-47.5°C])
• 0210= 4; Either local or remote thermistor resistance is less than 714 (209°F [98.3°C]) or greater than
561 k (-53.3°F [-47.5°C])
Note: When the thermistor used for control is out of range, then all Cool/Heat outputs turn OFF. The Fan AUTO mode turns
OFF the fan. The Fan ON mode will allow the fan to continue to run.
Note: For Configuration Option Number 0210= 4 and only one of the thermistors is out of range, the firmware will bypass
averaging and only use the thermistor that is within an acceptable range to control Cool and Heat. When both thermistors
return to range, the temperature averaging resumes. E0 will flash if either is out of range.
Note: For settings that use both internal/external thermistors, if the thermistor used for control is in range, then normal operation
should continue. However, EO should flash until the out-of-range thermistor is fixed.
Note: For resistance >561 Ohms, tolerance is ±7%. For resistance <714 Ohms, tolerance is ±3%.
E1; Internal/External
Humidity Sensor
(Refer to 0200)
• 0200= 0; This error check is disabled.
• 0200= 1; Invalid, no communication, or 100% humidity with internal humidity sensor. “--”displays in the humidity display
location for invalid or no communication. “99” will blink in the humidity display location for 100% humidity reading.
• 0200= 2; Current reading is out of range and is less than 4 mA or greater than 19.94 mA (100% humidity reading). For readings
less than 4mA, “--” will blink in the humidity display location. For 100% humidity readings, “99” will blink in the humidity display
location.
Note: Blink rate for humidity Out of Range or error E1 display is 1.5 seconds ON and 0.5 seconds OFF.
E2 Reserved
E3;Permanent Data Permanent data error. Access error or checksum error is detected.
E4;Input Voltage Out
of Range
• Input voltage out of range and is either too low or too high.
• 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%
E5; Real Time Clock
(RTC)
RTC (Real Time Clock) Error.
E6 Reserved
E7; Memory • Memory error (write and read 0x55 and 0xAA failed).
• Only checked during power-up test.
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