is part of the Donper R290 series, often found within the Donper-Compressor-Catalog-PDF.pdf . 4. Troubleshooting and Maintenance When servicing the Go to product viewer dialog for this item.
(Note: exact numeric ratings vary by supplier and operating conditions — always use the compressor’s datasheet for final design.) l68wu1 compressor pdf
Low Back Pressure (LBP) and Middle/Low Back Pressure (M/LBP). is part of the Donper R290 series, often
It depends on the region and refrigerant. Many R134a variants are still in production, but some older models using R12 are discontinued. The PDF will indicate the refrigerant. (Note: exact numeric ratings vary by supplier and
| Problem | Potential Causes | General Solutions | | :--- | :--- | :--- | | | Power supply issue, blown fuse, faulty pressure switch, tripped motor overload | Check power supply, reset breaker, replace fuse, allow compressor to cool and reset overload | | Compressor Hums but Doesn't Start | Faulty start capacitor, low voltage, seized motor, incorrect wiring | Check the start capacitor, verify voltage levels, inspect motor and wiring | | Starts and Stops Quickly | Faulty pressure switch, air leak, faulty check valve, overheating | Inspect pressure switch settings, check for system air leaks, test the check valve | | Runs Continuously | System air leak, excessive air consumption, worn piston rings, faulty pressure switch | Locate and repair leaks, inspect air tools for usage, check valves and rings | | Excessive Oil in System | Restricted air intake, restricted oil return, poorly filtered air, system contaminants | Check and clean air filters, inspect oil return lines, check for system contamination | | Unusual Noise or Vibration | Loose drive components, worn bearings, damaged parts, loose hardware | Inspect and tighten all mounting bolts, check for damaged bearings or faulty components |
Typically suitable for 300 to 350 Litre Capacity Deep Freezers. Voltage/Frequency: 220–240 V / 50 Hz. Motor Type: RSCR (Resistance Start Capacitor Run). Starting Torque: Low Starting Torque (LST). Design and Application
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