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15

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IX. Trouble-Shooting

Each Kooltronic Air Conditioner is engineered for performance and built for reliability. They are designed to
require only routine maintenance. If your air conditioner should require warranty service, please
contact Kooltronic. If you require service out of warranty, we have compiled a trouble-shooting chart
to assist your service personnel. If additional assistance is required contact Kooltronic at (609) 466-3400

.

Problem

Cause

Solution

Unit does not run.

No Power.

Check Power Source and electrical connection.
Check unit ON-OFF switch (UL Listed units only).
Check unit power cord connection to terminal block.

After initial 15 minute energization

Return temperature is

Normal Operation.

of air conditioner, compressor and

between Thermostat set

Check return air temperature.

condenser fan do not run.

point and differential

Check sensor connection on Thermostat.

(

92°F to 99°F).

Unit not cooling. (Temperature

Failed Thermostat

Check Thermostat and Relay wire connections.

difference between return and

or Relay.

Replace Thermostat or Relay.

supply air is less than 10°F).

Evaporator Blower is running. 

Low Line Voltage.

Check Nameplate Voltage against supply Voltage.

Compressor and Condenser Blower
do not run. Return temperature is

Failed Compressor.

Check Compressor wire connections.

above set point plus differential (90°F).

Check Compressor overload.
Check Compressor Capacitor.
Replace Compressor.

D. Refrigerant Loss

Kooltronic Air Conditioners are subjected to a series of tests to detect refrigerant leaks, during and after
manufacture. It is possible that shipping or other damage, or microscopic leaks over a long period, may result
in the need for replenishment of refrigerant charge.

When it has been verified by a Certified EPA Technician

that a refrigerant shortage does exist, the leak must be repaired. Then the unit may be evacuated and
recharged in the field by a Certified EPA Technician only.

CAUTION

E. Relocation

If your Kooltronic Air Conditioner has to be moved to another location by truck, the following precautions
should be taken:

De-mount the air conditioner from the equipment, controller or enclosure.

Conform to the applicable provisions of PROCEDURE FOR PROPER PACKING AND SHIPMENT OF
KOOLTRONIC AIR CONDITIONERS in this manual under 

Section III. "PRODUCT HANDLING".

Refer to the data on the unit name plate which specifies the type of

refrigerant and the amount of charge in ounces. 

Summary of Contents for KAC4P3777R

Page 1: ...ONDITIONER IT IS IMPORTANT THAT INSTALLATION INSTRUCTIONS DOCUMENT NUMBER 900 090 00 SHIPPED WITH THE UNIT BE READ AND UNDERSTOOD THOROUGHLY KOOLTRONIC INC 30 Pennington Hopewell Road Pennington NJ 08...

Page 2: ...Introduction Kooltronic Air Conditioners are designed to provide a cool dehumidified environment for your electronic components There are models to fit virtually all sizes and shapes of electronics en...

Page 3: ...ate in a horizontal position only This placement must be done a minimum of 5 minutes prior to operating in order to allow the compressor oil to drain to the compressor sump area CAUTION 3 Before opera...

Page 4: ...LABORATORIES INC TYPES 3R 12 INTERFACE TO THE ELECTRICAL ENCLOSURE ONLY NEMA EEMAC UL50 BY UNDERWRITERS LABORATORIES INC TYPE 1 SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT COMPARTMENT ONLY Air Conditio...

Page 5: ...hrough the evaporator coil is transferred by the compressed refrigerant to the condenser coil Ambient air is then passed through the condenser coil where it absorbs the heat and is then discharged to...

Page 6: ...he unit receptacle labeled Thermostat Power 5 Turn the electrical power on 6 Verify that the evaporator blower is running The remote control includes a compressor time delay After operating three 3 mi...

Page 7: ...two upper studs Run the unit power cord through the enclosure cutout 5 Secure the unit to the enclosure using the remaining 4 supplied 1 4 bolts and nuts the two saved 1 4 nuts and the supplied 7 was...

Page 8: ...4 3 LOCK WASHER 3 1 2 3 NOTE CUSTOMER TO INSTALL GASKET AS SHOWN START AND END GASKET MATERIAL HERE USE ONE CONTINUOUS PIECE OF GASKET AROUND PERIMETER OF UNIT BEND GASKET AROUND THE CORNERS DO NOT S...

Page 9: ...2 11 50 292 1 1 4 20 MOUNTING STUD TYP 2 PLACES POWER CORD 1 4 20 CAGE NUTS TYP 4 PLACES 7 50 190 5 13 00 330 2 8 24 209 3 9 41 239 0 Drawings and Dimensions KAC4P3777R Dimensions inches mm are for re...

Page 10: ...aporator Impeller Capacitor 0452 06 Condenser Coil 0666 66 Evaporator Coil 0667 64 Heater 0718 22 Filter 8001F Heating Thermostat 0750 132 Cooling Thermostat 0750 131 Standard Features Low Temperature...

Page 11: ...11 Wiring Schematic WD 1327 KAC4P3777R WD 1327...

Page 12: ...12 Wiring Schematic WDNCRMAN KAC4P3777R WDNCRMAN...

Page 13: ...EVAPORATOR BLOWER BK GN CAP HEATER COOLING T STAT THERMAL CUTOUT HEATER T STAT LIMITER SWITCH PRESSURE SWITCH CONDENSER IMPELLER RELAY NC NO CONDENSER IMPELLER R C S O L CAP COMPRESSOR WD 1328 Rev A K...

Page 14: ...y A Filter and condenser coil service If an optional filter is installed on externally mounted air conditioners filter should not be used for internal mounted air conditioner the rear panel must be re...

Page 15: ...running Low Line Voltage Check Nameplate Voltage against supply Voltage Compressor and Condenser Blower do not run Return temperature is Failed Compressor Check Compressor wire connections above set p...

Page 16: ...l difference between return and Coil clogged supply air is less than 10 F Evaporator Blower Condenser Loss of Refrigerant Locate and repair leak Blower and Compressor are running Ice on Evaporator Coi...

Page 17: ...was received by customer Number of parts to be returned Product description model and serial number Reason for return Action requested Contact name telephone FAX numbers and e mail address Pack unit i...

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