Carrier 48HJD005-007 specifications Troubleshooting, LED Error Code Service Analysis

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TROUBLESHOOTING

TROUBLESHOOTING

Refer to Tables 30-36 for troubleshooting details.

Table 30 — LED Error Code Service Analysis

SYMPTOM

CAUSE

REMEDY

Hardware failure.

Loss of power to control module (IGC).

Check 5 amp fuse on IGC, power to unit, 24-v circuit breaker, and

(LED OFF)

 

transformer. Units without a 24-v circuit breaker have an internal

 

 

overload in the 24-v transformer. If the overload trips, allow

 

 

10 minutes for automatic reset.

Fan ON/OFF delay modified

High limit switch opens during heat

Ensure unit is fired on rate and temperature rise is correct.

(LED/FLASH)

exchanger warm-up period before fan-on

 

 

delay expires.

 

 

Limit switch opens within three minutes

Ensure units’ external static pressure is within application guidelines.

 

after blower-off delay timing in Heating mode.

 

Limit switch fault.

High temperature limit switch is open.

Check the operation of the indoor (evaporator) fan motor.

(LED 2 flashes)

 

Ensure that the supply-air temperature rise is in accordance with

 

 

the range on the unit nameplate.

Flame sense fault.

The IGC sensed flame that should not be

Reset unit. If problem persists, replace control board.

(LED 3 flashes)

present.

 

4 consecutive limit

Inadequate airflow to unit.

Check operation of indoor (evaporator) fan motor and that supply-air

switch faults.

 

temperature rise agrees with range on unit nameplate information.

(LED 4 flashes)

 

 

Ignition lockout.

Unit unsuccessfully attempted ignition for

Check ignitor and flame sensor electrode spacing, gaps, etc.

(LED 5 flashes)

15 minutes.

Ensure that flame sense and ignition wires are properly

 

 

terminated. Verify that unit is obtaining proper amount of gas.

Induced-draft motor fault.

IGC does not sense that induced-draft

Check for proper voltage. If motor is operating, check the

(LED 6 flashes)

motor is operating.

speed sensor plug/IGC Terminal J2 connection. Proper

 

 

connection: PIN 1— White, PIN 2 — Red, PIN 3 — Black.

Rollout switch fault.

Rollout switch has opened.

Rollout switch will automatically reset, but IGC will continue to

(LED 7 flashes)

 

lock out unit. Check gas valve operation. Ensure that induced-

 

 

draft blower wheel is properly secured to motor shaft.

 

 

Reset unit at unit disconnect.

Internal control fault.

Microprocessor has sensed an error in the

If error code is not cleared by resetting unit power, replace the IGC.

(LED 8 flashes)

software or hardware.

 

If the IGC must be replaced, be sure to ground yourself to dissi- pate any electrical charge that may be present before handling new control board. The IGC is sensitive to static electricity and may be damaged if the necessary precautions are not taken.

IMPORTANT: Refer to heating troubleshooting for additional heating section troubleshooting information.

LEGEND

IGC — Integrated Gas Unit Controller

LED — Light-Emitting Diode

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Contents Step 1 - Provide Unit Support CONTENTSSAFETY CONSIDERATIONS INSTALLATION1′-4″ Fig. 1 - Roof Curb DetailsFig. 3 - Condensate Drain Pan Fig. 2 - Unit Leveling TolerancesStep 7 - Make Electrical Connections Table 1 - Physical Data Table 1 - Physical Data cont Fig. 5 - Base Unit Dimensions - 48HJ004-007 1/2″3/4″ Fig. 6 - Flue Hood Details Step 8 - Adjust Factory-Installed OptionsFig. 7 - Gas Piping Guide With Accessory Thru-the-Curb Service ConnectionsFig. 8 - Power Wiring Connections Fig. 10 - Field Control Wiring RacewayFig. 9 - Low-Voltage Connections With or Without Economizer Never operate a motor where a phase imbalance in supply volt age is greater than 2%. Use the following formula to determinethe percent of voltage imbalance Table 2C - 48HJ High-Static Motor Units Without Electrical Convenience Outlet 208/230-V Unit Shown Fig. 11 - Accessory Field-Installed HumidistatFig. 14 - Outdoor-Air Hood Details Fig. 13 - Typical Access Panel LocationsFig. 15 - Durablade Economizer Installed in Unit Fig. 16 - Horizontal Durablade Economizer InstallationFig. 20 - Outdoor-Air Thermostat Enthalpy Control Installation Wiring HarnessFig. 19A - Durablade Economizer Damper Minimum Position Setting Fig. 19B - Durablade Economizer Minimum Position Damper SettingFig. 22 - Durablade Economizer Barometric Relief Damper CharacteristicsFig. 24 - Typical Access Panel Locations Fig. 25 - Exhaust Air Hood AssemblyFig. 29 - EconoMi$er Installed Fig. 28 - Rear EconoMi$er Flange InstallationFig. 26 - Outdoor-Air Hood Assembly Fig. 27 - Completed Hood AssemblyPOWER EXHAUST SYSTEM HIGH VOLTAGE Fig. 31 - EconoMi$er Sensor WiringFig. 33 - Typical Access Panel Locations Fig. 32 - Wiring Diagram for Power Exhaust SystemPotentiometers Factory Settings Fig. 34 - Supply-Air Sensor PlacementTable 4 - Default Potentiometer Settings Fig. 35 - EconoMi$er Control AdjustmentStep 9 - Adjust Evaporator-Fan Speed - Ad Fig. 38 - Evaporator-Fan Pulley AdjustmentFig. 37 - Belt-Drive Motor Mounting Table 5A - 48HJ Fan Rpm at Motor Pulley Setting With Standard Motor Table 6 - Evaporator-Fan Motor Data - Standard MotorTable 7 - Evaporator-Fan Motor Data - High-Static Motors Table 8 - Motor Nominal Horsepower Table 9 - Outdoor Sound Power Total UnitBels Table 12 - 48HJ005 Fan Performance - Vertical Discharge Units With Standard Motor 3-Phase Units Single-Phase UnitsTable 16 - 48HJ007 Fan Performance - Vertical Discharge Units With Standard Motor Table 18 - 48HJ004 Fan Performance - Horizontal Discharge Units With Standard Motor Table 20 - 48HJ005 Fan Performance - Horizontal Discharge Units With Standard Motor 3-Phase Units Package Static Pressure Drop in. wg FIOP - Factory-Installed OptionTable 26 - Economizer Static Pressure Drop in. wg Table 27 - FIOP MoistureMiser DehumidificationSTART-UP PRE-START-UPHeating Operating SequenceTable 28 - Altitude Compensation When the supply-air temperature falls between 57 F and Fig. 39 - MoistureMiser Option Operation Fig. 42 - Separating Coil Sections SERVICELubrication Fig. 40 - Cleaning Condenser Coil Fig. 41 - Propping Up Top PanelFig. 43 - Condenser-Fan Adjustment Fig. 44 - Cooling Charging Chart Standard 48HJ004Fig. 45 - Cooling Charging Chart Standard 48HJ005 Fig. 47 - Cooling Charging Chart Standard 48HJ007 Fig. 46 - Cooling Charging Chart Standard 48HJ006Fig. 48 - Cooling Charging Chart, 48HJ004 with Optional MoistureMiser Dehumidification Package Fig. 52 - Burner Section Details Fig. 53 - Burner Tray Details Table 29 - LED Error Code Description48HJF005-007 - 150,000 BTUH INPUT Fig. 54 - Spark Gap AdjustmentLOW HEAT 48HJE004, 48HJD005-007 - 72,000 BTUH INPUT MEDIUM AND HIGH HEAT 48HJE005-007, 48HJF004 - 115,000 BTUH INPUTTable 30 - LED Error Code Service Analysis TROUBLESHOOTINGTable 32 - Durablade Economizer Service Analysis Table 31 - Heating Service AnalysisTable 34 - EconoMi$er Troubleshooting Table 33 - EconoMi$er Flash Code IdentificationCritical Table 35 - MoistureMiser Dehumidification Subcooler Service Analysis Compressor operates continuously Table 36 - Cooling Service Analysis208/230 3-Phase Unit Shown Fig. 55 - Typical Wiring Schematic and Component ArrangementNOTES FOR FIG LEGEND AND NOTES FOR FIGReplaces 48HJ-17SI Page III. START-UP START-UP CHECKLIST Remove and Store in Job FileI. PRELIMINARY INFORMATION II. PRE-START-UP insert checkmark in box as each item is completed
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