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Carrier Cassette Air Conditioner Error Codes

 Carrier cassette fault codes; Once a failure occurs with the indoor unit in operation, the green unit LED flashes at intervals of 0.5 seconds. The fault code is deduced from the number of times the green LED flashes, blocking unit operation. Between one flash cycle and the next one, a pause of 5 seconds elapses.

Carrier Cassette Air Conditioner Fault Codes
Carrier Cassette Air Conditioner Fault Codes

Carrier Fault Codes and Troubleshooting

Once a failure occurs with the indoor unit in operation, the green unit LED flashes at intervals of 0.5 seconds. The fault code is deduced from the number of times the green LED flashes, blocking unit operation. Between one flash cycle and the next one, a pause of 5 seconds elapses.

Error CodesDescription
3Room air sensor fault
2Condensate discharge pump
4Indoor unit coil sensor fault
6Filter dirty
7Outdoor unit failure
10EEPROM corrupt
11Card serial number damaged
12Address / zone incomplete
13Gas flow distributor corrupt
14Outdoor air thermistor
Carrier Cassette Display of Selected Functions
Carrier Cassette Display of Selected Functions

 

Aircon will not start:

  • The main switch is switched OFF, place the switch in the ON position.
  • The fuses on the main switch are burnt out; replace the fuses. ( this operation need to be carried out by qualified personnel only).
  • Wait for 3 minutes: protection against frequent compressor cycling is ON.
  • Selected temperature is higher than the room temperature (or lower in the heating mode).

The unit emits unpleasant smells:

Unpleasant smells can accumulate on the air filters and then be dispersed into the room during air conditioner operation. Switch the unit OFF and contact an authorised service centre to have the filters cleaned. Restart unit in the ventilation (fan only) mode and open windows to change room air.

The unit makes strange noises:

Occasionally the unit makes strange noises at start-up, during operation or when it has stopped. These are generally due to the effect of temperature changes on the plastic parts.

Air conditioner is not supplying enough cooling (or heating):

  • Air cannot circulate freely.
  • Dirty filter reduces air quantity circulating.
  • Filter must be cleaned by skilled personnel only.
  • Doors and/or windows are open.
  • Fan speed has been set to ‘low’.
  • Air flow direction is not correct for optimum ventilation.
  • Selected temperature is not correct.

P (Green LED) indicator is flashing:

System malfunction. Contact service organisation after having ensured that:

  • Air circulation is not obstructed.
  • Outdoor unit coil is not obstructed and causing severe reduction of air circulation.
  • Condensate drainage tube is not obstructed.

As regards fault codes to be communicated to the after-sales

Q (Red LED) indicator is illuminated:

In the heating mode, the LED switches on to indicate an active defrost condition.

Periodical checks

Carrier Cassette Periodical Checks
Carrier Cassette Periodical Checks

Carrier Cassette Air Conditioner  MANUAL PDF

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