Discharge Temperature Error
Please, do the following troubleshooting steps:
- Disconnect the unit, wait for 5 minutes and reconnect it. Check the discharge thermistor for continuity.
- Fix gauges on the system and switch on the cooling mode. Set the fan at a high position set 64 degrees and test-run the unit. Measure the suction pressure on the low side.
- If it is too low (110 / 130 PSI or lower), there may be a charge issue or a leak.
- Disconnect the unit and remove the charge. Check the piping for blockages and restrictions. Blow nitrogen through the evaporator, condenser and piping to ensure there are no obstruction.
- If there are no restrictions, apply a pressure of up to 600 PSI throughout the condenser. Check the condenser coil for leaks using soap bubbles. They are most likely to occur at flare nuts, bends, 2-way/3-way valves, etc. This simple method is even more effective than using an electronic leak detector.
- Replace parts, which have leaks.