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Subject to change without prior notice Revised 03-11

6 720 220 046

26 TA Series

Troubleshooting

TroubleSHooTInG

Problem

Possible Cause

Checks and Corrections

Entire unit

does not run

Power Supply Off

Apply power, close disconnect

Blown Fuse

Replace fuse or reset circuit breaker. Check for correct fuses

Voltage Supply Low

If voltage is below minimum voltage specified on unit data plate,

contact local power company.

Thermostat

Set the fan to “ON”, the fan should run. Set thermostat to “COOL” and

lowest temperature setting, the unit should run in the cooling mode

(reversing valve energized). Set unit to “HEAT” and the highest tempera-

ture setting, the unit should run in the heating mode. If neither the blower

or compressor run in all three cases, the thermostat could be miswired or

faulty.To ensure miswired or faulty thermostat verify 24 volts is available

on the condensing section low voltage terminal strip between “R” and

“C”, “Y” and “C”, and “O” and “C”. If the blower does not operate, verify

24 volts between terminals “G” and “C” in the air handler. Replace the

thermostat if defective.

Blower

operates but

compressor

does not

Thermostat

Check setting, calibration, and wiring

Wiring

Check for loose or broken wires at compressor, capacitor, or contactor.

Safety Controls

Check UPM board red default L.E.D. for Blink Code

Compressor

overload open

If the compressor is cool and the overload will not reset, replace compres-

sor.

Compressor motor

grounded

Internal winding grounded to the compressor shell. Replace compressor.

If compressor burnout, install suction filter dryer.

Compressor

windings Open

After compressor has cooled, check continuity of the compressor

windings. If the windings are open, replace the compressor

Unit off on

high pressure

control

Discharge pressure

too high

In “COOLING” mode: Lack of or inadequate water flow. Entering water

temperature is too warm. Scaled or plugged condenser.

In “HEATING” mode: Lack of or inadequate air flow. Blower inoperative,

clogged filter or restrictions in duct work

Refrigerant charge

The unit is overcharged with refrigerant. Reclaim refrigerant, evacuate

and recharge with factor recommended charge.

High pressure

Check for defective or improperly calibrated high pressure switch.

Unit off on

low pressure

control

Suction pressure

too low

In “COOLING” mode: Lack of or inadequate air flow. Entering

air temperature is too cold. Blower inoperative, clogged filter or

restrictions in duct work

In “HEATING” mode: Lack of or inadequate water flow. Entering water

temperature is too cold. Scaled or plugged condenser.

Refrigerant charge

The unit is low on refrigerant. Check for refrigerant leak, repair,

evacuate and recharge with factory recommended charge.

Low pressure

switch

Check for defective or improperly calibrated low pressure switch.

Unit short

cycles

Unit oversized

Recalculate heating and or cooling loads.

Thermostat

Thermostat installed near a supply air grill; relocate thermostat.

Readjust heat anticipator.

Wiring and controls Check for defective or improperly calibrated low pressure switch.

Содержание TA025

Страница 1: ...Installation and Maintenance Manual TA Series 6 720 220 046 Revised 03 11 ...

Страница 3: ...ed Systems 12 System Checkout 13 Unit Start Up 13 Heat Recovery Package 13 Maintenance 15 Well Water Application 16 Cooling Tower Boiler Application 17 Earth Coupled Application 18 Wiring Diagrams 19 Single Phase ECM Blower 19 Single Phase ECM Blower Electric Heat 20 Operating Pressures Temperatures 21 Unit Check Out 25 Trouble Shooting 26 Table of Contents Model Nomenclature SUPPLY AIR LOCATION T...

Страница 4: ...ored or moved in the normal upright position as indicated by the UP arrows on each carton at all times If unit stacking is required stack units as follows Vertical units less than 6 tons no more than two high Horizontal units less than 6 tons no more than three high Do not stack units larger than 6 tons SAFETY CONSIDERATIONS Installation and servicing of this equipment can be hazardous due to syst...

Страница 5: ... drain in both directions to facilitate condensate removal See Figure 4 Figure 4 slightly larger than the base to minimize vibration transmission to the building structure It is not necessary to anchor the unit to the floor See Figure 1 MOUNTING HORIZONTAL UNITS While horizontal units may be installed on any level surface strong enough to hold their weight they are typically suspended above a ceil...

Страница 6: ... must be as large as the unit connections on the heat pump larger on long runs Never use flexible hoses of a smaller inside diameter than that of the fluid connections on the unit TA units are supplied with either a copper or optional cupro nickel condenser Copper is adequate for ground water that is not high in mineral content Should your well driller express concern regarding the quality of the ...

Страница 7: ...cities and maximum fuse breaker sizing Figure 5 Electrical Box Component Layout SINGLE TWO STEP Figure 6 ECM Interface Board ECM INTERFACE BOARD THERMOSTAT CONNECTIONS Thermostatwiringisconnectedtothe10pinscrewtype terminalblockonthelowercenterportionoftheECM InterfaceBoard Inadditiontoprovidingaconnecting pointforthermostatwiring theinterfaceboardalso translatesthermostatinputsintocontrolcommands...

Страница 8: ...ermostat connection block are four sets of jumper pins labeled ADJ DELAY HEAT and COOL The ADJ set of pins are labeled NORM and TEST TA units will all be set on the NORM position from the factory however airflow can be increased or decreased by 15 from the pre programmed setting by relocating the jumper in this section The TEST position is used to verify proper motor operation If a motor problem i...

Страница 9: ...imesin1hour theunitwillentera hardlockoutandneedtobereset BROWNOUT SURGE POWER INTERRUPTION PROTECTION The brownout protection in the UPM board will shut down the compressor if the incoming power falls below 18 VAC The compressor will remain off till the voltage goes above 18 VAC and the anti short cycle timer 300 seconds times out The unit will not go into a hard lockout MALFUNCTIONOUTPUT Thecont...

Страница 10: ...ppropriate tap to ensure a minimum of 18 volts secondary control voltage 24 volts is ideal for best operation 2 Long length thermostat and control wiring leads may create voltage drop Increase wire gauge or up size transformers may be required to insure minimum secondary voltage supply 3 Boschrecommendsthefollowingguidelinesfor wiringbetweenathermostatandtheunit 18GAup to60foot 16GAupto100ftand14G...

Страница 11: ...ntil the thermostat stages are satisfied Note that if the unit compressor lock out for any reason at this time the electric heaters will continue to function normally Once the thermostat is satisfied the compressor shuts down and the fan ramps down either fan only mode or off over a span of 30 seconds If emergency heat W2 EM is called for the fan will ramp up to emergency heat air flow immediately...

Страница 12: ...Utilizing the Ground Loop Pumping Package GLP makes the installation easy Anti freeze solutions are utilized when low evaporating conditions are expected to occur Refer to the GLP installation manuals for more specific instructions Earth Coupled Systems anyknownhazardsexistinyourarea werecommend propertestingtoassurethewellwaterqualityissuitable forusewithwatersourceequipment Inconditions anticipa...

Страница 13: ... Set the thermostat to maintain the desired space temperature 12 Check for vibrations leaks etc Heat Recovery package The Heat Recovery package is a factory mounted option It consists of a forced pumped unit that em ploys a circulating pump to move water through a double wall vented heat exchanger and returns the heated water to the water tank The water is heated by superheated refrigerant dischar...

Страница 14: ...efrigeration system and conserve the most energy On tanks with both upper and lower elements and thermostats the lower element should be turned down to 100 F while the upper element should be adjusted to 120 F Depending upon the specific needs of the customer you may need to adjust the upper element differently On tanks with a single thermostat lower the thermostat setting to 120 F or the LOW posi...

Страница 15: ...r is not required however may be performed on some motors to extend motor life Use SAE 20 non detergent electric motor oil 4 The condensate drain should be checked annually by cleaning and flushing to insure proper drainage 5 Periodic lockouts almost always are caused by air or water flow problems The lockout shutdown of the unit is a normal protective measure in the design of the equipment If con...

Страница 16: ...F EWT MIN 1 LINE VOLTAGE DISCONNECT UNIT 2 FLEX DUCT CONNECTION 3 LOW VOLTAGE CONTROL CONNECTION 4 LINE VOLTAGE CONNECTION 5 VIBRATION PAD 6 P T PORTS 7 HOSE KITS Optional 8 BALL VALVES 9 SOLENOID VALVE SLOW CLOSING 10 CONDENSATE DRAIN CONNECTION 11 PRESSURE TANK Optional 12 LINE VOLTAGE DISCONNECT ELECTRIC HEATER NOTE SEE FIGURE 3 FOR CONDENSATE DRAIN CONNECTION ...

Страница 17: ...lication COOLING TOWER BOILER APPLICATION 1 LINE VOLTAGE DISCONNECT UNIT 2 LOW VOLTAGE CONTROL CONNECTION 3 P T PLUGS Optional 4 HOSE KITS Optional 5 BALL VALVES 6 SUPPLY AND RETURN LINES OF CENTRAL SYSTEM 7 FLEX DUCT CONNECTION 8 HANGING BRACKETS ASSEMBLY 9 THREADED ROD 10 HANGING BRACKET ASSEMBLY NOTE SEE FIGURE 3 FOR CONDENSATE DRAIN CONNECTION ...

Страница 18: ...NE VOLTAGE DISCONNECT UNIT 2 FLEX DUCT CONNECTION 3 LOW VOLTAGE CONTROL CONNECTION 4 LINE VOLTAGE CONNECTION UNIT 5 P T PORTS 6 VIBRATION PAD 7 CONDENSATE DRAIN 8 GROUND LOOP CONNECTION KIT 555 000 001 9 GROUND LOOP PUMPING PACKAGE GL001 1 or 002 1 10 POLYETHELENE WITH INSULATION 11 LINE VOLTAGE DISCONNECT ELECTRIC HEATER NOTE SEE FIGURE 3 FOR CONDENSATE DRAIN CONNECTION ...

Страница 19: ...6 720 220 046 Revised 03 11 Subject to change without prior notice 19 TA Series Typical Wiring Diagram Figure 13 Typical Wiring Diagram Single Phase ECM Blower Motor ...

Страница 20: ...Subject to change without prior notice Revised 03 11 6 720 220 046 20 TA Series Typical Wiring Diagram Single Phase ECM Blower Motor Electric Heat Typical Wiring Diagram ...

Страница 21: ...17 17 19 138 168 305 373 8 9 23 27 8 143 174 288 353 8 10 18 21 145 177 312 382 5 6 24 29 4 153 186 346 423 14 17 16 19 151 184 317 388 8 10 25 29 8 147 179 325 398 8 9 17 20 158 193 325 398 6 7 26 31 4 158 191 389 477 13 16 16 18 8 152 185 366 448 8 9 17 20 4 5 73 89 266 325 5 6 15 18 9 0 77 94 272 333 3 4 16 19 4 5 117 143 189 231 14 17 18 22 86 105 279 341 6 7 17 21 9 0 112 137 178 217 8 9 19 2...

Страница 22: ... 21 17 21 117 143 311 380 12 15 27 33 12 0 132 153 291 356 10 12 18 22 123 151 319 390 8 10 29 35 6 0 134 164 349 426 17 20 17 20 128 157 324 396 13 16 29 36 12 0 129 158 328 401 9 12 18 22 135 165 332 406 9 11 31 38 6 0 139 170 392 480 16 20 16 20 12 0 133 163 369 451 9 11 17 21 6 0 71 87 277 339 6 7 15 19 12 0 75 92 284 347 4 5 16 20 6 0 118 144 194 237 21 25 19 23 84 102 291 356 7 9 18 22 12 0 ...

Страница 23: ...157 315 385 13 16 19 23 131 160 364 444 11 14 31 38 14 0 125 153 294 360 10 12 19 24 139 170 371 454 8 10 33 40 7 0 132 161 348 426 13 16 18 22 143 175 385 471 12 15 33 41 14 0 128 156 326 398 10 12 19 23 152 186 393 480 9 11 35 43 7 0 134 164 382 466 12 15 17 21 14 0 131 160 357 436 9 11 18 22 9 0 71 87 259 316 5 7 19 23 18 0 76 92 264 322 4 5 20 25 9 0 116 141 175 213 18 22 19 23 84 102 280 342 ...

Страница 24: ... 11 14 31 38 18 0 128 156 297 363 10 12 19 24 142 173 374 457 8 10 33 40 9 0 135 164 351 429 13 16 18 22 146 178 388 474 12 15 33 41 18 0 131 159 329 401 10 12 19 23 155 189 396 483 9 11 35 43 9 0 137 167 385 469 12 15 17 21 18 0 134 163 360 439 9 11 18 22 Suction Pressure PSIG Water Temp Drop F COOLING HEATING Entering Water Temp F Water Flow GPM Water Temp Rise F Air Temp Drop F Suction Pressure...

Страница 25: ..._________ _______________ ______________ Fluid Flow gpm ______________________________ ______________________________ Source Fluid Type _______________________________ ______________________________ Fluid Flow gpm ______________________________ ______________________________ Fluid Side Pressure Drop ______________________________ ______________________________ Suction Discharge Pressure psig _____...

Страница 26: ... Compressor motor grounded Internal winding grounded to the compressor shell Replace compressor If compressor burnout install suction filter dryer Compressor windings Open After compressor has cooled check continuity of the compressor windings If the windings are open replace the compressor Unit off on high pressure control Discharge pressure too high In COOLING mode Lack of or inadequate water fl...

Страница 27: ... causing inefficient operation Compressor Check for defective compressor If discharge is too low and suction pressure is too high compressor is not pumping properly Replace compressor Reversing Valve Defective reversing valve creating bypass of refrigerant from discharge of suction side of compressor Replace reversing valve Operating pressures Compare unit operation pressures to the pressure tempe...

Страница 28: ...601 N W 65th Court Ft Lauderdale FL 33309 Phone 954 776 5471 Fax 954 776 5529 www boschtaxcredit com www fhp mfg com ...

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