Fujitsu error code a1

Fujitsu error code a1

Discharge Temperature Error

Please, do the following troubleshooting steps:

  1. Disconnect the unit, wait for 5 minutes and reconnect it. Check the discharge thermistor for continuity.
  2. 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.
  3. If it is too low (110 / 130 PSI or lower), there may be a charge issue or a leak.
  4. 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.
  5. 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.
  6. Replace parts, which have leaks.