Troubleshooting Guide - Aprilaire 62 Safety And Installation Instructions Manual

• Turn the knob to "Test/Reset." The "Humidifier On" light
will illuminate. After 5 seconds, the green "Humidifier On"
light will blink, indicating a system reset.
• If the humidifier control and humidifier are set up properly,
the solenoid valve should click and the HVAC blower should
activate.
• If the humidifier does not activate with the humidifier
control in the "Test/Reset" position, refer to the

troubleshooting guide.

• If HVAC blower does not activate with the humidifier
control in the "Test/Reset" position, refer to the
troubleshooting guide.
8. Setting the humidifier control:
• If the home is vacant, set the humidifier control to "OFF."
• If in Manual Mode and the system is installed during
cooling season, set the humidifier control to "OFF."
• If the home is occupied, set the humidifier control to
"Normal." For Manual Mode, set to 35%.
• The Blower Activation feature will not activate immediately
even if there is low humidity. The humidifier control will
wait for the next HVAC call or 1 hour, whichever comes
first, before starting the humidifier. To start the humidifier
before these conditions are satisfied, set the humidifier
control to test mode. When the humidifier starts, set the
humidifier control to "Normal."
9. Instruct the homeowner to refer to the Aprilaire Owner's
Manual for the initial adjustment period.
10. Make sure the red "Call Dealer for Service" light is not
flashing. If the red "Call Dealer for Service" light is flashing,
refer to the troubleshooting guide.
20
TROUBLESHOOTING GUIDE
SYMPTOM
"Call Dealer For Service" light flashing (see Figure M).
TROUBLESHOOTING PROCEDURE
Applies to both Automatic and Manual operation unless
indicated otherwise.
Display Error Code: E1: RH Sensor
Rotate humidifier control knob to the "Test/Reset" position.
After 5 seconds, the green "Humidifier On" light will blink,
resetting the error. If "E1" returns, replace the humidifier
control.
Display Error Code: E2: Control Knob
Rotate humidifier control knob to the "Test/Reset" position.
After 5 seconds, the green "Humidifier On" light will blink,
resetting the error. If "E2" returns, replace the humidifier
control.
Display Error Code: E3: Outdoor Temperature Sensor
Auto Mode (switch in "AUTO" position)
1. Make sure that the ODT sensor is properly connected to the
ODT terminals on the humidifier control.
2. Measure the resistance of the ODT sensor by removing the
leads from the humidifier control terminals and measuring
the resistance across the wires with an ohmmeter. Confirm
the reading with the temperature in Table 1 on page 23.
Reconnect the ODT sensor leads. If the resistance value
does not match the temperature value, replace the ODT
sensor.
21