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29

Table 11—

Troubleshooting Guide–Heating

SYMPTOM

CAUSE

REMEDY

Burners will not ignite

Water in gas line

Drain. Install drip leg.

No power to furnace

Check power supply fuses, wiring or circuit breaker.

No 20--v power supply to control circuit

Check transformer.

NOTE: Some transformers have internal over--current protection

that requires a cool--down period to reset.

Mis--wired or loose connections

Check all wiring and wire nut connections

Misaligned spark electrodes

Check flame ignition and sense electrode positioning.

Adjust as necessary.

No gas at main burners

1. Check gas line for air. Purge as necessary. NOTE: After purging

gas line of air, wait at least 5 minutes for any gas to dissipate be-

fore attempting to light unit.

2. Check gas valve.

Inadequate heating

Dirty air filter

Clean or replace filter as necessary

Gas input to furnace too low

Check gas pressure at manifold match with that on unit nameplate

Unit undersized for application

Replace with proper unit or add additional unit

Restricted airflow

Clean or replace filter. Remove any restriction.

Limit switch cycles main burners

Check rotation of blower, temperature rise of unit. Adjust as neces-

sary.

Poor flame characteristics

Incomplete combustion results in: Aldehyde odors,

carbon monoxide, sooting flame, floating flame

1. Tighten all screws around burner compartment

2. Cracked heat exchanger. Replace.

3. Unit over--fired. Reduce input (change orifices or adjust gas line

or manifold pressure).

4. Check burner alignment.

5. Inspect heat exchanger for blockage. Clean as necessary.

Table 12—

Troubleshooting Guide–LED Error Codes

SYMPTOM

CAUSE

REMEDY

Hardware failure

(LED OFF)

Loss of power to control module (IGC)*.

Check 5--amp fuse son IGC*, power to unit, 24--v circuit breaker,

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

nal overload in the 24--v transformer. If the overload trips, allow 10

minutes for automatic reset.

Fan ON/OFF delay modified

(LED/FLASH)

High limit switch opens during heat exchanger warm--

up period before fan--on delay expires. Limit switch

opens within three minutes after blower--off delay tim-

ing in heating mode.

Ensure unit is fired on rate; ensure temperature rise is correct.

Ensure unit’s external static pressure is within application guide-

lines.

Limit switch faults

(LED 2 flashes)

High temperature limit switch is open.

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

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

on the unit nameplate. Clean or replace filters.

Flame sense fault

(LED 3 flashes)

The IGC* sensed flame that should not be present.

Reset unit. If problem persists, replace control board.

4 consecutive limit switch

faults

(LED 4 flashes)

Inadequate airflow to unit.

Check the operation of the indoor (evaporator) fan motor and that

supply--air temperature rise agrees with range on unit nameplate

information.

Ignition lockout

(LED 5 flashes)

Unit unsuccessfully attempted ignition for 15 minutes.

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

sure that fame sense and ignition wires are properly terminated.

Verify that unit is obtaining proper amount of gas.

Induced--draft motor fault

(LED 6 flashes)

IGC does not sense that induced--draft motor is operat-

ing.*

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

sensor plug/IGC Terminal J2 connection. Proper connection:

PIN 1 -- White

PIN 2 -- Red

PIN 3 -- Black

Rollout switch fault

(LED 7 flashes)

Rollout switch has opened.

Rollout switch will automatically reset, but IGC* will continue to

lockout unit. Check gas valve operation. Ensure that induced--draft

blower wheel is properly secured to motor shaft. Inspect heat ex-

changer. Reset unit at unit disconnect.

Internal control fault

(LED 8 flashes)

Microprocessor has sensed an error in the software or

hardware.

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

IGC*.

Temporary software lockout

(LED 9 flashes)

Electrical interference impeding IGC software

Reset 24--v. to control board or turn thermostat off, then on again.

Fault will automatically reset itself in one (1) hour.

*

WARNING

:

If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that my be present before handling new control board. The IGC is

sensitive to static electricity and my be damaged if the necessary precautions are not taken.

IMPORTANT

: Refer to Table 11--Troubleshooting Guide--Heating for additional troubleshooting analysis.

LEGEND

IGC—Integrated Gas Unit Controller
LED—Light--Emitting Diode

48E

S

Содержание 48ES

Страница 1: ...Start Up Cooling Make Adjustments 18 Checking Cooling Control Operation 18 Checking Adjusting Refrigerant Charge 18 Indoor Airflow and Airflow Adjustments 19 Cooling Sequence of Operation 19 MAINTENAN...

Страница 2: ...t for shipping damage while unit is still on shipping pallet If unit appears to be damaged or is torn loose from its anchorage have it examined by transportation inspectors before removal Forward clai...

Страница 3: ...UNGROUNDED SURFACES POWER ENTRY SIDE 36 00 914 0 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES POWER ENTRY SIDE 42 00 1066 8 LEGEND CG Center of Gravity COND Condensor EVAP Evaporator...

Страница 4: ...m BETWEEN UNITS POWER ENTRY SIDE 42 00 1066 8 UNIT AND UNGROUNDED SURFACES POWER ENTRY SIDE 36 00 914 0 UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES POWER ENTRY SIDE 42 00 1066 8 LEGEN...

Страница 5: ...eck pan Short Support CTyp G E F G D E A05308 UNIT SIZE ODS CATALOG NUMBER A IN MM B IN MM C IN MM D IN MM E IN MM F IN MM G IN MM 48ES018 036 CPRFCURB006A00 8 203 11 279 16 1 2 419 28 3 4 730 30 3 8...

Страница 6: ...eered and designed to be installed only on Small Packaged Products This bracket is to be used to rig lift a Small Packaged Product onto roofs or other elevated structures Prior to initial use and at m...

Страница 7: ...Size in 20x24x1 508x610x25 mm 24x30x1 610x762x25 mm 24x36x1 610x914x25 mm Table 1 Physical Data Con t Unit 48ES UNIT SIZE 048090 048115 048130 060090 060115 060130 NOMINAL CAPACITY ton 4 4 4 5 5 5 OPE...

Страница 8: ...sure that the outlet of the trap is at least 1 in 25 4 mm lower than the drain pan condensate connection to prevent the pan from overflowing See Fig 7 Prime the trap with water When using agravel apro...

Страница 9: ...joint when making pipe connections Use only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and or national codes Never use Teflon tape 4 Install sediment tra...

Страница 10: ...nd power up unit NOTE The design and installation of the duct system must be in accordance with the standards of the NFPA for installation of nonresidence type air conditioning and ventilating systems...

Страница 11: ...when the standard power and low voltage entry points are used See Fig 3 and 4 for acceptable location See unit wiring label and Fig 11 for reference when making high voltage connections Proceed as fol...

Страница 12: ...rate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured 3 Do not remove compressor terminal cover until all electrical sources are disconnected a...

Страница 13: ...e Refer to unit rating plate for required charge Step 2 Start up Heating and Make Adjustments Complete the required procedures given in the Pre Start Up section before starting the unit Do not jumper...

Страница 14: ...h only a minor change in the manifold pressure is required Observe manifold pressure and proceed as follows to adjust gas input 1 Removecoverscrewoverregulatoradjustmentscrew ongas valve 2 Turn regula...

Страница 15: ...15 A07230 Fig 15 208 230 1 60 Wiring Diagram 48ES...

Страница 16: ...16 A07232 Fig 16 208 230 3 60 Wiring Diagram 48ES...

Страница 17: ...17 A07231 Fig 17 460 3 60 Wiring Diagram 48ES...

Страница 18: ...e rollout switch reaches the maximum allowable temperature the control circuit trips closing the gas valve and stopping gas flow to the burners The indoor evaporator fan motor IFM and induced draft mo...

Страница 19: ...tions and adjusted properly Airflow can be changed using the User Interface ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Disconnect electrical power...

Страница 20: ...a gauge to the service port 2 Measure the Liquid line temperature by attaching a temperature sensing device to it 3 Insulate the temperature sensing device so that the Outdoor Ambient doesn t affect...

Страница 21: ...9 994 917 837 702 570 442 Heating Rise oF C 54 30 58 32 62 34 68 38 NA NA NA NA NA Medium Watts 503 491 479 461 450 436 418 404 389 CFM 1320 1244 1162 1081 1005 897 767 662 541 Heating Rise oF C 51 28...

Страница 22: ...729 1647 1496 Heating Rise oF C 31 17 32 18 33 18 34 19 36 20 37 21 39 22 41 23 45 25 48ES N 060115 35 65 19 36 Low1 Watts 786 769 754 736 722 705 684 658 616 CFM 2027 1960 1901 1821 1759 1693 1616 15...

Страница 23: ...necessary AIR FILTER IMPORTANT Never operate the unit without a suitable air filter in the return air duct system Always replacethe filterwith thesame dimensional size and type as originally installed...

Страница 24: ...ses Observe the main burner flames and adjust if necessary Removal of Gas Train To remove the gas train for servicing 1 Shut off main gas valve 2 Shut off power to unit and install lockout tag 3 Remov...

Страница 25: ...function has occurred check each electrical component with the proper electrical instrumentation Refer to the unit wiring label when making these checks REFRIGERANT CIRCUIT Annually inspect all refrig...

Страница 26: ...t extreme high pressure The relief port has an operating range between 550 26 34 kPa and 625 psi 29 93 kPa differential pressure The Copeland scroll compressor uses Mobil 3MAF POE oil Copeland Ultra 2...

Страница 27: ...ow side with 550 psig low side retard S Use hoses with 700 psig service pressure rating S Leak detectors should be designed to detect HFC refrigerant S Puron as with other HFCs is only compatible with...

Страница 28: ...or Replace and determine cause Insufficient line voltage Determine cause and correct Blocked outdoor coil Determine cause and correct Defective run start capacitor Determine cause and replace Faulty o...

Страница 29: ...te ensure temperature rise is correct Ensure unit s external static pressure is within application guide lines Limit switch faults LED 2 flashes High temperature limit switch is open Check the operati...

Страница 30: ...________ COMPRESSOR AMPS_________________________________ INDOOR EVAPORATOR FAN AMPS___________ TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE ___________DB RETURN AIR TEMPERATURE ___________DB ______...

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