Carrier 50TJ016-028 specifications EconoMi$er Troubleshooting, Problem Potential Cause Remedy

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Table 17 — EconoMi$er Troubleshooting

 

PROBLEM

POTENTIAL CAUSE

REMEDY

Damper Does Not

Indoor (Evaporator) Fan is

Check to ensure that 24 vac is present at Terminal C1 (Common Power)

Open

Off

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.

 

 

No Power to EconoMi$er

Check to ensure that 24 vac is present across Terminals 24 VAC and

 

 

Controller

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.

 

 

No Power to G Terminal

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).

 

 

Controller Fault

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.

 

 

Thermostat Fault

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.

 

 

Actuator Fault

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.)

EconoMi$er

Minimum Position Set

Verify that the MIN POS (%) is set greater than zero. Adjust MIN POS (%)

Operation Limited to

Incorrectly

to 100% to verify operation, and then set to correct setting.

Minimum Position

 

 

EconoMi$er Changeover

Set at correct value. See Table 5.

 

 

Set Point Set Too High or

 

 

 

Too Low

 

 

 

Discharge Air

If STATUS light is flashing 4 flashes, Discharge Air Thermistor is

 

 

Thermistor Faulty

faulty. Check wiring or replace sensor.

 

 

Outdoor Air Temperature

If STATUS light is flashing 5 flashes, Outdoor Air Temperature Sensor is

 

 

Sensor Faulty

faulty. Check wiring or replace sensor.

Damper Position

Supply Air Low Limit

The supply-air temperature is less than 45 F, causing the minimum

Less than Minimum

Strategy Controlling

position to be decreased. Refer to the Start-Up instructions. Verify correct

Position Set Point

 

setting of MIN POS (%). If correct, EconoMi$er is operating correctly.

Damper Does Not

CO2 Ventilation Strategy

If a CO2 sensor is being used, and the damper position is greater than

Return to Minimum

Controlling

minimum position, the ventilation control strategy is controlling. Refer to

Position

 

The Start-Up instructions. EconoMi$er is operating correctly.

Damper Does Not

Damper Travel is

Check to ensure the damper is not blocked.

Close on Power Loss

Restricted

 

 

LEGEND

 

 

IFM

Indoor Fan Motor

 

 

PL

Plug

 

 

Table 18 — MoistureMiser Dehumidification Subcooler Service Analysis

PROBLEM

CAUSE

 

REMEDY

Subcooler will not energize

No power to subcooler

Check power source. Ensure all wire connections

 

control transformer.

are tight.

 

No power from subcooler

1.

Fuse open; check fuse. Ensure continuity of wiring.

 

control transformer to liquid line three way valve.

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.

 

Liquid line three-way valve

1.

Solenoid coil defective; replace.

 

will not operate.

2.

Solenoid valve stuck closed; replace.

Subcooler will not deenergize

Liquid Line three-way valve

Valve is stuck open; replace.

 

will not close.

 

 

Low system capacity

Low refrigerant charge or

1.

Check charge amount. See system charging

 

frosted coil.

 

section.

 

 

2.

Evaporator coil frosted; check and replace

 

 

 

subcooler control low pressure switch if necessary.

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Contents Contents InstallationSafety Considerations Unit Roof Curb DetailsFt-in 016 Unit Maximum Dimensions Shipping Weight020 024Base Unit Dimensions, 50TJ016,020 Base Unit Dimensions, 50TJ024,028 COMPRESSOR/MANUFACTURER Physical DataConcentric Duct Details Unit Voltage Make Electrical ConnectionsGND NECMin Max Electrical DataRLA LRA Qty FLA ea50TJ Unbalanced 3-Phase Supply VoltageOptional Non-Fused Disconnect Wiring Make Outdoor-Air Inlet AdjustmentsHeat Anticipator Settings Unit Stage016-028 Seal Strip Location Air Hood Cross-Sectional View EconoMi$er Switchover Control Strategy Default Potentiometer SettingsChangeover Set Points Motormaster I Control Installation 50TJ016 and 020 Only Wind Baffle Details Motormaster I Sensor Locations START-UP Air Quantity LimitsUnit Minimum CFM Maximum CFM Fiop Fan Performance 50TJ016Fan Performance 50TJ020 Fan Performance 50TJ028 Accessory/FIOP Static Pressure in. wg 50TJ016 Accessory/FIOP Static Pressure in. wg 50TJ020-028Fan Rpm at Motor Pulley Settings Base Unit Operation Lubrication ServiceManufacturer Lubricant Evaporator Fan Service and ReplacementCondenser-Fan Adjustment Belt Tension Adjustment To adjust belt tensionEconoMi$er Adjustment EconoMi$er Control Module Flash Code IdentificationFlash Code Cause Action Taken by ECONOMI$ER Protective Devices Cooling Charging Chart208/240 v Amps 200/230 v kW 71.3/82.3 Electric Heat117/135 156/180Typical Component Arrangement 50TJ024 Shown HTR HPSIFC IFRTroubleshooting Cooling Service AnalysisProblem Cause Remedy EconoMi$er Troubleshooting MoistureMiser Dehumidification Subcooler Service AnalysisProblem Potential Cause Remedy Call for Free Catalog Service TrainingPage PRE-START-UP START-UP Checklist