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IX. Trouble-Shooting
Each Kooltronic Air Conditioner is engineered for performance and built for reliability.
They are designed to require no routine maintenance other than the cleaning of ambient
air filters. If your air conditioner should require service, 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 not Cooling No Power Check Power Source and
Electrical Connections
Loss of Refrigerant Locate and repair leak
Evaporator or Condenser Replace Motor, Capacitor or
Blower not operating entire Assembly
Filter clogged Clean or replace Filter
Clogged Evaporator or Clean Coil
Condenser Coil
Low Temperature Control Lower setting until unit starts
(Thermostat) improperly set
Low Temperature Control Replace Thermostat or Relay
(Thermostat) defective when applicable
Failed Compressor Replace Compressor
Ice on Evaporator Coil Insufficient Heat Load or Unit Contact Kooltronic
Oversized for Application
Failed Evaporator Blower Replace Evaporator Blower
Motor or Assembly
Clogged Evaporator Coil Clean Coil
Condensate draining Enclosure not properly sealed Check and seal all openings
continuously
Excessive opening of Enclosure Eliminate the frequency of
door opening
Excessive vibration Defective Motor in Blower Replace Motor
Defective Wheel in Blower Replace Wheel
Compressor Loose Tighten Mounting Bolts
Compressor Inoperative Low line Voltage Check Nameplate Voltage
against supply
Loss of Compressor Oil Replace Compressor
Loss of Refrigerant Locate and repair leak
Failed Compressor Capacitor Replace Capacitor
Thermal Overload Contact Kooltronic
Power interruptions Allow Compressor time to reset
Refrigerant or Oil leaks Crack or pin hole in tubing or Replace tubing or rebraze joint
brazed joint
