- 33 -
troubleshooting Guidelines
(CoNt’D)
Symptom
Potential Problem
Solution
The motor is
running with no
demand from the
HVAC System.
There is a constant
fan call from the
thermostat.
WARNING: ALWAYS
DISCONNECT MAIN
HVAC SYSTEM
POWER BEFORE
DIS-CONNECTING
OR RE-CONNECTING
ANY WIRES OR
CONNECTORS TO THE
EVERGREEN MOTOR.
The Evergreen IM is designed to
operate a special constant fan
speed if there is power on the
High Voltage POWER connections
and the High Voltage SIGNAL
connections with no power on
the Low Voltage SIGNAL (speed)
connections.
If there is a constant fan call from
the thermostat this is normal.
If there is not a constant fan call
from the thermostat check the High
Voltage SIGNAL connections. If
they are connected to a constant
120vac source refer to the wiring
diagrams on pages 9-12.
There is too much
airflow and/or any
of the following:
The temperature
rise is too low
oR
The electric strip
heat airflow is to
cold
oR
There is no
dehumidification
in the A/C mode.
The selected speed,
horse power or
motor is too high.
WARNING: ALWAYS
DISCONNECT MAIN
HVAC SYSTEM
POWER BEFORE
DIS-CONNECTING
OR RE-CONNECTING
ANY WIRES OR
CONNECTORS TO THE
EVERGREEN MOTOR.
To reduce the speed of the
motor, change the Low Voltage
SIGNAL (speed) connection to the
thermostat demand to a lower
value.
See the wiring diagram on page 30.
To reduce the horse power of the
motor change the High Voltage
SIGNAL connection(s) to the HVAC
System fan controls.
See the selection chart on page 30.
If the motor is on the lowest horse
power and the lowest speed and
there is still too much airflow, the
motor selections is too big for
the HVAC system.
The motor turns
on and off multiple
times when the
main power to
the HVAC system
is reset.
The motor is
performing a
rotation sensing.
The rotation sensing
feature should only
perform once, the
first time the motor
is turned on or if it
has been reset as
described on the
next page.
See “Rotation Sensing” page 23.
If the motor has been operating
properly for more than 60 seconds
but continues to perform the
rotation sensing feature any time
the High Voltage Power to the
motor is disconnected, please call
the Evergreen Hotline at 866-503-
8566.
®
I
Evergreen IM manual 01-13.indd 33
2/13/13 11:12 AM
