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16

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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.

(75°F to 86°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 nameplate which specifies the type of

refrigerant and the amount of charge in ounces. 

Содержание Guardian KNA4C9DP47L-1

Страница 1: ... THAT THIS MANUAL BE READ AND UNDERSTOOD THOROUGHLY KOOLTRONIC INC 30 Pennington Hopewell Road Pennington NJ 08534 609 466 3400 FAX 609 466 1114 www kooltronic com 900 039 101 2 20 CDR 20226 GUARDIAN SERIES KNA4C9DP47L 1 Find additional information on this model at kooltronic com or use the Technical Documents QR code below Technical Documents ...

Страница 2: ...18 I 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 enclosures in capacities ranging from 1 000 to 30 000 BTU H Our closed loop design also ensures that your components will not be exposed to hot dirty operating conditions This Manual provides you w...

Страница 3: ...to operating in order to allow the compressor oil to drain to the compressor sump area CAUTION 3 Before operating this unit all electrical wiring must be checked to assure the proper connection to the correct power source Minimum circuit ampacity should be at least 125 of the amperage found on the air conditioner nameplate for the corresponding voltage Do not exceed the maximum fuse size found on ...

Страница 4: ...tches these requirements r Make sure that these parameters are met Failure to do so may result in permanent damage to the unit ALL MOTORS ARE THERMALLY PROTECTED VIOLATES WARRANTY UNAUTHORIZED SERVICE OR MODIFICATION OUTDOOR USE COMPARTMENT ONLY NEMA EEMAC UL50 BY UNDERWRITERS LABORATORIES INC TYPE 1 SPECIAL PURPOSE AIR CONDITIONER EQUIPMENT TYPE 3R 12 4 INTERFACE TO THE ELECTRICAL ENCLOSURE ONLY ...

Страница 5: ...s the heat and is then discharged to the environment When the Kooltronic Air Conditioner is properly sized it should operate constantly and maintain 75 F to 115 F enclosure temperature depending on the ambient temperatures CONTROL ACTION The evaporator blower operates continuously The compressor is cycled on and off by the action from the factory preset programmable thermostat A pressure switch co...

Страница 6: ...ore the new set point value push the SET key again or wait 10 seconds HOW TO CHANGE A PARAMETER VALUE To change a parameter s value operate as follows 1 Enter the Programming mode by pressing the SET plus down arrow keys for 3 seconds the C or F LED starts blinking 2 Select the required parameter Press the SET key to display its value 3 Use up or down arrow keys to change its value 4 Press SET to ...

Страница 7: ...ap code 7 0 65535 rEL Software release 0 rSE Real set point 0 onF on off key enabling ES PbC Kind of probe ntc Adr Serial address 1 1 247 HES Differential for energy saving 0 F 54 54 rrd Regulation restart with door open alarm y odc Compress status when open door no nPS Number of activation of pressure switch 15 0 15 did Digital input alarm delay 5 min 0 255 i1F Digital input configuration EAL i1P...

Страница 8: ...ge 6 for instructions on adjustment of the thermostat 7 Operate the air conditioner for approximately ten 10 minutes During this period no unusual noise or vibration should be evident Both the evaporator and condenser fans or blowers should be delivering air through their respective discharge ports The cool air discharged should be less than 70 F when the room temperature is between 70 and 80 F It...

Страница 9: ...nd mounting holes do not interfere with components inside the cabinet To avoid damaging your air conditioner please read the following information before installation 1 These externally mounted air conditioners have two gasket layers to ensure a proper seal This seal is necessary to maintain the integrity of the closed loop system and the enclosure NEMA 4 or NEMA 4X Rating 2 Attach two hooks to th...

Страница 10: ...18 0 7 00 178 0 32 8 0 7 00 178 0 5 00 127 0 16 28 414 0 28 79 731 0 1 54 39 0 11 05 281 0 13 59 345 0 1 75 44 0 17 09 434 0 10 312 10 0 DIA HOLES MOUNTING PLAN 2 1 MOUNTING PLAN Dimensions inches mm are for reference only and are subject to change KNA4C9DP47L 1 WARM AIR RETURN FROM ENCLOSURE COOL AIR OUTLET TO ENCLOSURE 1 2 ...

Страница 11: ... 5 67 144 0 2 48 63 0 17 29 439 0 10 81 274 0 9 86 250 0 MOUNTING BRACKETS 17 50 445 0 16 44 418 0 2 42 62 0 6 20 157 0 MODBUS TERMINAL BLOCK 11 14 283 0 30 8 0 33 27 845 0 NOTE FILTER BRACKET NOT SHOWN 4 2 3 2 2 1 3 8 ID X 1 2 OD PVC DRAIN TUBE K_NA4C9DP47L Dimensions inches mm are for reference only and are subject to change Drawings and Dimensions GA290002A CONDENSER AIR INLET Ambient Air In CO...

Страница 12: ...Cycling Control 0712 18 Thermostat 0750 136 Thermostat Sensor 0750 136 01 Relay 0694 57 Expansion Valve 0689 39 Hot Gas Bypass Valve 0689 23 Drain Tube 5 Foot 0625 38 0500 Standard Features Baked Powder Finish Built in Condensate Evaporator CFC Free R134a Refrigerant Closed Loop Cooling Compressor Short Cycle Protector Condenser Impeller Cycling Epoxy Coated Condenser and Evaporator Coils Condense...

Страница 13: ...13 Wiring Diagrams ...

Страница 14: ...14 Wiring Diagrams ...

Страница 15: ...nued operation under these conditions will cause damage shorten compressor life and void the warranty A Filter and condenser coil service The rear panel must be removed in order to clean the filters After removal the filters should be flushed under warm running water with clean side up If the accumulated dirt is oily washing in a detergent bath is recommended followed by a warm water wash as above...

Страница 16: ...s 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 refrig...

Страница 17: ...or Clean Coil 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 Coil Clean Evaporator Coil Check discharge and suction pressure for Refrigerant leak Check for any obstruction of Evaporator airflow Check and seal all openings Excessive condensate Eliminate...

Страница 18: ...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 in a suitable container for shipment preferably the original packaging if available All Air Conditioners must be returned in an upright position properly secured to a pallet Improper packaging may void war...

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