To initiate a manual defrost on the Unifrost CR1800FT counter fridge, press and hold the DEFROST button on the controller for 5 seconds.
Applies to
This guide applies specifically to the Unifrost CR1800FT commercial counter fridge.
Before you start
- Confirm that the Unifrost CR1800FT counter fridge is properly powered up before attempting to operate the controller.
- Note that the appliance automatically runs a defrost cycle every six hours starting from initial power-up.
- Check if abnormal cabinet temperatures are being caused by excessive ice formation on the evaporator coil.
- Be prepared to defrost the appliance as the standard troubleshooting procedure when too much ice covers the evaporator.
- Ensure that no mechanical tools or sharp scrapers are brought near the refrigeration components.
Safety warnings
- Risk of fire or explosion is present because this appliance uses flammable R290 refrigerant.
- Do not use mechanical devices or tools to accelerate the defrosting of the refrigerator.
- Do not puncture or pierce any part of the refrigerant piping.
- The refrigeration system must be repaired only by trained service personnel.
Automatic Defrost Timing and Timer Reset Rules
The Unifrost CR1800FT appliance automatically runs a defrost cycle every six hours under standard operation.
This automatic cycle interval starts counting from the time the appliance is initially powered up.
Starting a manual defrost also resets the automatic defrost timer.
The next automatic defrost cycle will start six hours after the manual defrost has finished.
The automatic defrost schedule resumes its six-hour intervals from the exact time the manual defrost completes.
Step-by-Step Manual Defrost Procedure
Operators can manually defrost the appliance directly from the front controller interface whenever required.
- Locate the DEFROST button on the front control panel of the appliance.
- Press and hold the DEFROST button for 5 seconds.
- Confirm that the defrost cycle starts immediately upon holding the button.
- Check that the Defrost LED illuminates on the controller display.
- Allow the defrost cycle to run for its full duration, which will last a maximum of 30 minutes.
Defrost Indicators and Cycle Duration
When manual defrost is initiated, the defrost cycle will start immediately.
The Defrost LED illuminates to indicate that the defrost cycle is actively in progress.
The defrost cycle will last for a maximum duration of 30 minutes.
Starting this manual defrost cycle resets the appliance's automatic defrost timer.
The subsequent automatic defrost will start six hours after the manual defrost has finished.
Troubleshooting Evaporator Ice Build-up
Excessive ice on the evaporator can cause the appliance temperature to become too high or too low while powered on.
If there is too much ice on the evaporator, defrost the appliance to resolve the issue.
Running the manual defrost cycle eliminates excessive evaporator ice build-up without physical intervention.
Do not attempt to scrape or chip ice from the evaporator using mechanical tools.
Mechanical devices must be avoided because puncturing refrigerant piping creates a fire or explosion risk with flammable R290 refrigerant.
Flammable R290 Refrigerant Safety Boundaries
The Unifrost CR1800FT contains flammable R290 refrigerant within its cooling circuit.
Flammable refrigerant introduces a risk of fire or explosion if safety rules are violated.
Never use mechanical devices or sharp tools to defrost the refrigerator cabinet.
Take strict care never to puncture or damage the refrigerant piping under any circumstances.
All repairs and internal servicing must be performed only by trained service personnel.
Stop and get help if
- Stop operation immediately if refrigerant piping is punctured or leaking flammable R290 refrigerant.
- Do not proceed with any internal equipment repairs if you are not trained service personnel.
When to call an engineer
- Call a trained service technician if the appliance requires repairs or refrigerant circuit servicing.
- Escalate to qualified service personnel if temperature faults persist after defrosting excessive ice from the evaporator.