Error Codes - Aprilaire 8800 Safety & Installation Instructions

ERROR CODES

If the thermostat enters an error mode, all outputs are turned off. The thermostat attempts to recover every 10 minutes.
If the error does not clear, use the reset button. This will return all settings back to factory default.
Error code Message
01
"SENSOR ERROR"
02
03 "RH SENSOR ERROR"
04 "EEPROM ERROR"
05 "SENSOR ERROR"
18
Error Description
Open temperature sensor circuit
Shorted temperature sensor circuit
Invalid response from the RH sensor
Error in permanent memory
All controlling support modules are unresponsive and
the built-in sensor is not used as a backup option
SpECIfICATIONS
Operating: 32° to 120°F (0° to 48.9°C)
Temperature
Shipping: -30° to 150°F (-34.4° to 65.5°C)
Relative humidity Operating: 5% to 90% R.H. (non-condensing)
Operating voltage 24VAC (18 – 30VAC)
Maximum: 2.5A (total), 1.0A (single output)
Current
Maximum surge current: 5A
Battery back-up AA size alkaline battery x 2
Outdoor & Remote temperature sensor Maximum distance: 300 feet
Room temperature measurement Display range: 32° to 99°F (0° to 40°C)
Outdoor temperature measurement Display range: -20° to 130°F (-30° to 55°C)
Heat: 40° to 90°F (4° to 32°C)
Setpoint temperature range
Cool: 50° to 99°F (10° to 37°C)
Humidification: 10% to 90% R.H.
Setpoint humidity range
Dehumidification: 10% to 90% R.H.
Environment
Electrical
Thermal
19