Canadian Curtis Refrigeration Inc

By: Canadian Curtis  09-12-2011
Keywords: Coil

Service and Maintenance


  • Check electrical breakers/fuses – there may be multiple circuit breakers for each unit.
  • Check the temperature control to make sure someone has not adjusted the operating temperature incorrectly or changed the setting to heating instead of cooling.
  • Check to see if the condenser coil is dirty or blocked, not allowing the heat transfer at the condenser – this is located outside of the box usually on top or at a remote location, possibly outdoors.
  • Do not use the dial thermometer on the door frame as the actual temperature of the freezer/cooler – these are only an indicator and are easily affected by the door opening due to the sensor location
  • Note - When units go into defrost steam may occur at the coil inside walk-in freezers – it is not smoke - also on reach-ins at the condensate pan underneath the freezer or cooler.
  • If the coil inside the cooler is iced up, manually defrost the coil by shutting of the compressor. The fans should remain on to defrost the coil. After defrosting the coil the temperature should fall to the set temperature. If it ices up again call for service.


Failures due to the malfunction of electrical or plumbing facilities are not covered under warranty. Normal maintenance as contained in the Operating Instructions is the responsibility of the purchaser, or a qualified service agent.

Please be advised that in conformance with the industry standard practice Canadian Curtis Refrigeration Inc. assumes no responsibility for product or production losses due to malfunction or failure of the equipment, however caused. It is the responsibility of the equipment owner or operator to secure appropriate protective insurance.

  • Cleaning of evaporator coils
  • Cleaning of condenser coils
  • Cleaning of evaporator condensate drain pans
  • Cleaning of evaporator fan motors and blades
  • Lubricate fan motors
  • Checking of all electrical components
  • Checking of all settings
  • Checking refrigerant and oil charge

Annual Cleaning

  • Dismantling of evaporator for chemical cleaning
  • Chemical cleaning of evaporator coils
  • Cleaning of outdoor condenser coils
  • Cleaning of indoor evaporator drain pans
  • Clearing of condensation drain lines
  • Cleaning of evaporator fan blades
  • Checking of all electrical components
  • Checking of all settings
  • Re-installation of indoor cooler units
  • Checking refrigerant and oil charge

Key Benefits

  • Pro-long life span of equipment
  • Savings on electrical energy costs

Recommended Service Frequency

  • 24 Hour Operation Monthly (12x)
  • 12 Hour operation Bi-Monthly (6x)
  • 8 Hour operation Quarterly (4x)
  • See Regular Maintenance Service and Annual Cleaning for details.


  • High Temperature - Opening and closing the door will result in a temporary rise in temperature. Remember, the thermometer indicates air temperature not product temperature. Loading your unit with warm product will result in a rise in air temperature until product heat has been removed. During defrost cycles the temperature readout may rise slightly. Never attempt to adjust the condensing unit controls. All controls are factory preset to allow for proper operation.
  • Ice on coil - Ice or frost on the evaporator coil is normal in freezers. The auto-defrost system is designed to eliminate any normal frost accumulation on the coil every 6 to 8 hours. Excessive ice accumulation is not normal and can be caused by high ambient humidity, excessive use, improper condensate draining, faulty drain line heater or leaving the door open for prolonged periods.
  • Compressor failure - If the compressor is not running, first make sure the unit is not on defrost as the condensing unit shuts down for the cycle. Check the breaker and fuses even if the lights inside the cabinet still function.
  • Condensate pan - If the pan is not working properly, the condensate will overflow onto the floor make sure the pan is plugged in and positioned correctly. Check for faulty fuses even if the condensing unit and coil fans are still operating.

Keywords: Coil