Bryant 548F Installation, Start-Up And Service Instructions Manual page 44

PROBLEM
Damper does not Indoor Fan is
open. Off.
No power to EconoMi$er
controller.
No power to G Terminal.
Controller fault.
Thermostat fault.
Actuator Fault.
EconoMi$er Minimum position set
operation limited incorrectly.
to minimum
EconoMi$er changeover
position.
set point set too high or
too low.
Supply air temperature
sensor faulty.
OAT sensor faulty.
Damper position Supply air low limit
less than minimum strategy controlling.
position set point.
Damper does not CO
return to minimum controlling.
position.
Damper does not Damper travel is
close on power
restricted.
loss
LEGEND
IFM — Indoor-Fan Motor
PL — Plug
Table 32 — EconoMi$er Troubleshooting
CAUSE
Check to ensure that 24 vac is present at Terminal C1 (Common Power)
on the IFC (Indoor Fan contactor) or that 24 vac is present at
the IFO (Indoor Fan On) terminal. Check whether 24 vac is
present at PL (Plug 6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is
not present, check wiring (see unit label diagram).
Check proper thermostat connection to G on the connection board.
Check to ensure that 24 vac is present across Terminals 24 VAC and
24V COM on the EconoMi$er control. If 24 vac is not present, check
wiring (see unit label diagram). If 24 vac is present, STATUS light should
be on constantly.
If IFM is on, check to ensure 24 vac is present on G Terminal of the
EconoMi$er controller. If 24 vac is not present, check wiring (see unit
label diagram).
If STATUS light is flashing on flash, the EconoMi$er controller is
experiencing a fault condition. Cycle power to the controller. If condition
continues, replace the EconoMi$er controller.
If STATUS light is flashing two flashes, the EconoMi$er controller senses
the thermostat is wired incorrectly. Check wiring between the thermostat
and the connection board in the electrical panel. The fault condition is
caused by Y2 being energized before Y1.
Check the wiring between the EconoMi$er controller and the actuator.
Hold CONFIG button between three and ten seconds to verify the
actuator's operation. (This process takes three minutes to complete.)
Verify that the MIN POS (%) is set greater than zero. Adjust
MIN POS (%) to 100% to verify operation, and then set to correct setting.
Set at correct value. See Table 3.
If STATUS light is flashing four flashes, the supply air temperature
sensor is faulty. Check wiring or replace sensor.
If STATUS light is flashing five flashes, the OAT sensor is faulty. Check
wiring or replace sensor.
The supply air temperature is less than 45° F, causing the minimum
position to decrease. Refer to the Start-Up instructions. Verify correct
setting of MIN POS (%). If correct, EconoMi$er is operating correctly.
ventilation strategy If a CO
2
minimum position, the ventilation control strategy is controlling. Refer to
the Start-Up instructions. EconoMi$er is operating correctly.
Check to ensure the damper is not blocked.
sensor is being used, and the damper position is greater than
2
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REMEDY