Bryant DuraPac 558F Installation & Service Instructions Manual page 34

PROBLEM
Damper Does Not Indoor (Evaporator) 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 to Incorrectly
Minimum Position
EconoMi$er Changeover
Set Point Set Too High or
Too Low
Discharge Air
Thermistor Faulty
Outdoor Air Temperature
Sensor Faulty
Damper Position Supply Air Low Limit
Less than Minimum Strategy Controlling
Position Set Point
Damper Does Not CO
Return to Minimum Controlling
Position
Damper Does Not Damper Travel is
Close on Power Loss Restricted
LEGEND
IFM — Indoor-Fan Motor
PL — Plug
Table 19 — Perfect Humidity™ Dehumidification Subcooler Service Analysis
PROBLEM
Subcooler will not energize
Subcooler will not deenergize
Low system capacity
Table 18 — EconoMi$er Troubleshooting
POTENTIAL CAUSE
Check to ensure that 24 vac is present at Terminal C1 (Common Power)
on the IFC (Indoor [Evaporator] Fan Contactor) or that 24 vac is present at
the IFO (Indoor [Evaporator] Fan On) terminal. Check whether 24 vac is
present at PL6-1 (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
24 V 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 one 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$er controller senses that
the thermostat is wired incorrectly. Check wiring between the thermostat
and the connection board in the electrical panel. The fault condition is
caused by Y2 being energized before Y1.
Check the wiring between the EconoMi$er controller and the actuator.
Hold CONFIG button between 3 and 10 seconds to verify the
actuator's operation. (This process takes 3 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 5.
If STATUS light is flashing 4 flashes, Discharge Air Thermistor is
faulty. Check wiring or replace sensor.
If STATUS light is flashing 5 flashes, Outdoor Air Temperature Sensor is
faulty. Check wiring or replace sensor.
The supply-air temperature is less than 45 F, causing the minimum
position to be decreased. 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.
CAUSE
No power to subcooler control transformer.
No power from subcooler control transformer to
liquid line three way valve.
Liquid line three-way valve will not operate.
Liquid Line three-way valve will not close.
Low refrigerant charge or frosted coil.
REMEDY
sensor is being used, and the damper position is greater than
2
Check power source. Ensure all wire connections
are tight.
1. Fuse open; check fuse. Ensure continuity of wiring.
2. Subcooler control low pressure switch open.
Cycle unit off and allow low-pressure switch
to reset. Replace switch if it will not close.
3. Transformer bad; check transformer.
1. Solenoid coil defective; replace.
2. Solenoid valve stuck closed; replace.
Valve is stuck open; replace.
1. Check charge amount. See system charging
section.
2. Evaporator coil frosted; check and replace
subcooler control low pressure switch if necessary.
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REMEDY