Ibis Rooftop Air Conditioner Error Codes



Error CodesMeaning
E1Room sensor fault. Usually a faulty connection (plug), damaged lead or a faulty sensor itself.
E2Inside coil sensor fault. Usually a faulty connection (2 plugs) Damaged lead or faulty sensor.
E3Outside coil sensor fault. Usually a faulty connection (2 plugs), damaged lead or faulty sensor.
E4Indicates lack of refrigerant, or the compressor is not running, or the thermistor is out of calibration. Check that the compressor is running by listening.
E5E5 indicates excessive temp. of the outside coil if on cooling, OR excessive temp of the inside coil in heat mode. On cooling, the E5 will appear if the outside coil temp exceeds 68C. This is an indication of condenser airflow reduced or non-existent.
E6 & E7Error codes E6 & E7 are not utilised in this system. If either of these codes appear, then change the main control board.
  • E1: Room sensor failure
  • E2: Indoor coil sensor failure
  • E3: Outdoor coil sensor failure
  • E4: Insufficient of refrigerant
  • E5: Compressor overload
  • E6: Not Used
  • E7 : Not Used
  • E8: Outdoor air sensor failure
  • E9: Wall pad room sensor failure

Troubleshooting

Symptom: Unit does not operate

Cause:

  1. No power supply to unit
  2. Remote control is not operating
  3. Fault condition rapid flashes of ‘Fan’ indicator light on plenum

Correction:




  1. Check that mains power is plugged into van and that the supply is switched ON. Check the van’s air-conditioner power circuit breaker is ‘ON’
  2. Check the remote control screen. If blank then replace batteries, Remote control batteries.
  3. 4 rapid flashes – inside coil not cooling “E4”, 5 rapid flashes – return air sensor fault “E1”, 6 rapid flashes – inside coil sensor fault “E2”, 7 rapid flashes – outside coil sensor fault “E3”, 8 rapid flashes – outside coil over temperature “E5”.

Symptom: Poor cooling or heating performance

Cause:

  1. Return air filter is blocked
  2. Air outlets are closed
  3. Outside fan air intake is blocked
  4. High outside air temperatures in cooling
  5. Low outside air temperatures in heating
  6. Intermittent operation during very hot & very cold days

Correction:

  1. Remove filter, clean & replace. Remove filter from plenum. Clean filter every 4 weeks, more frequently with high use
  2. Ensure that at least 2 outlets are opened. Highest capacity occurs when all 4 outlets are fully opened
  3. Check that debris has not blocked the external air intake of the roof top unit. Clear intake grille
  4. Take action to reduce your peak heat load – extend awnings, close blinds, windows & hatches, start air conditioner earlier in the morning
  5. Discuss expected heat loss with your caravan supplier and size air conditioning capacity to suit
  6. During cooling on very hot days the compressor overload may be activated. This is to protect the unit. Take all steps to reduce heat load on caravan

Symptom: Water coming from roof top unit and draining across the outside of the caravan roof

Cause:

  1. In cooling mode this is ‘condensate’ water that has been removed from the air inside your van
  2. In heating mode this is water that has been melted during de-ice cycles

Correction:

  1. This is normal. The unit will dehumidify air inside the caravan and provide more comfortable living conditions. In humid conditions close doors, windows and hatches. Run the inside fan on High or Medium. Avoid using Low or Auto fan speeds in these conditions
  2. This is normal. During heating on cold mornings the unit will periodically enter automatic de-ice mode to clear ice from the outside coil. Normal operation will resume once ice has been melted

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